From f26c94edabcce1eb3b4de959cd03c13bc3a86e29 Mon Sep 17 00:00:00 2001
From: iamsoorena <s.soorena@gmail.com>
Date: Thu, 14 Dec 2017 18:41:38 +0330
Subject: [PATCH 01/29] adding function to clean json objects, deeply.

---
 snippets/clean-json-objects.md | 20 ++++++++++++++++++++
 1 file changed, 20 insertions(+)
 create mode 100644 snippets/clean-json-objects.md

diff --git a/snippets/clean-json-objects.md b/snippets/clean-json-objects.md
new file mode 100644
index 000000000..46ef745dc
--- /dev/null
+++ b/snippets/clean-json-objects.md
@@ -0,0 +1,20 @@
+### Clean Json objects
+
+Clean your json object from unwanted keys, deeply.
+provide set of `keys` to keep and an indicator for `children` if there is any.
+
+```js
+const cleanObj = (obj, keys = [], childIndicator) => {
+  Object.keys(obj).forEach(key => {
+    if (key === childIndicator) {
+      cleanObj(obj[key], keys, childIndicator)
+    } else if (!keys.includes(key)) {
+      delete obj[key]
+    }
+  })
+}
+/*
+  dirtyObj = { a: 1, b: 2, children: {a: 1, b :2}}
+  let cleaned = cleanObj(dirtyObj, [a]) // { a: 1, children : { a: 1}} 
+ */
+```

From 210976364c03912aa668eeb51b2eebda686c5079 Mon Sep 17 00:00:00 2001
From: atomiks <sprytex@gmail.com>
Date: Fri, 15 Dec 2017 09:04:08 +1100
Subject: [PATCH 02/29] Create compose-functions.md

---
 snippets/compose-functions.md | 15 +++++++++++++++
 1 file changed, 15 insertions(+)
 create mode 100644 snippets/compose-functions.md

diff --git a/snippets/compose-functions.md b/snippets/compose-functions.md
new file mode 100644
index 000000000..cd60bb7e0
--- /dev/null
+++ b/snippets/compose-functions.md
@@ -0,0 +1,15 @@
+### Compose functions
+
+Use the `...rest` operator to gather all function arguments into an array. Return a function which takes
+a single argument and uses `Array.reduceRight()` to return the result of applying each function.
+
+```js
+const compose = (...fns) => n => fns.reduceRight((acc, fn) => fn(acc), n);
+/*
+const addOne = n => n + 1;
+const square = n => n * n;
+const double = n => n * 2;
+compose(addOne, square, double)(2) -> 17
+equivalent to: addOne(square(double(2)))
+*/
+```

From c8a3a91642c823c9d2ed10ac78749d1ced40e275 Mon Sep 17 00:00:00 2001
From: Huseyin Sekmenoglu <sekmenhuseyin@users.noreply.github.com>
Date: Fri, 15 Dec 2017 11:35:57 +0300
Subject: [PATCH 03/29] Create convert-json-date.md

---
 snippets/convert-json-date.md | 14 ++++++++++++++
 1 file changed, 14 insertions(+)
 create mode 100644 snippets/convert-json-date.md

diff --git a/snippets/convert-json-date.md b/snippets/convert-json-date.md
new file mode 100644
index 000000000..3c0d276dc
--- /dev/null
+++ b/snippets/convert-json-date.md
@@ -0,0 +1,14 @@
+### Convert Json Date
+ 
+Convert dates coming from ajax as json to readable format
+Example: converts "/Date(1489525200000)/" to "15/2/2017"
+ 
+ ```js
+cconst JsonToDate = arr =>
+    {
+        const dt = new Date(parseInt(arr.toString().substr(6)));
+        return dt.getDate() + '/' + dt.getMonth() + '/' + dt.getFullYear();
+    };
+ // JsonToDate(/Date(1489525200000)/) -> 15/2/2017
+ ```
+ 

From cec3db48a67a94ea2e41305325984a409cbf5f8c Mon Sep 17 00:00:00 2001
From: iamsoorena <s.soorena@gmail.com>
Date: Fri, 15 Dec 2017 13:08:12 +0330
Subject: [PATCH 04/29] resolving some issues about comments

---
 snippets/clean-json-objects.md | 7 ++++---
 1 file changed, 4 insertions(+), 3 deletions(-)

diff --git a/snippets/clean-json-objects.md b/snippets/clean-json-objects.md
index 46ef745dc..2835b37fd 100644
--- a/snippets/clean-json-objects.md
+++ b/snippets/clean-json-objects.md
@@ -14,7 +14,8 @@ const cleanObj = (obj, keys = [], childIndicator) => {
   })
 }
 /*
-  dirtyObj = { a: 1, b: 2, children: {a: 1, b :2}}
-  let cleaned = cleanObj(dirtyObj, [a]) // { a: 1, children : { a: 1}} 
- */
+  dirtyObj = {a: 1, b: 2, children: {a: 1, b: 2}}
+  cleanObj(dirtyObj, ["a"],"children")
+  console.log(dirtyObj)// { a: 1, children : { a: 1}}
+*/
 ```

From fce4b2b0f3c040f8b0d443001d01738b21d8ad67 Mon Sep 17 00:00:00 2001
From: David Wu <david10608@gmail.com>
Date: Fri, 15 Dec 2017 14:34:55 +0100
Subject: [PATCH 05/29] Create 3DigHexcode-to-6DigHexcode.md

---
 snippets/3DigHexcode-to-6DigHexcode.md | 12 ++++++++++++
 1 file changed, 12 insertions(+)
 create mode 100644 snippets/3DigHexcode-to-6DigHexcode.md

diff --git a/snippets/3DigHexcode-to-6DigHexcode.md b/snippets/3DigHexcode-to-6DigHexcode.md
new file mode 100644
index 000000000..d424f41cd
--- /dev/null
+++ b/snippets/3DigHexcode-to-6DigHexcode.md
@@ -0,0 +1,12 @@
+### 3DigHexcode to 6DigHexcode
+
+Use `Array.map()` to map the array created by `String.split()` and `Array.join()` to join 
+the mapped array for converting a three-digit RGB notated hexadecimal colorcode to the six-digit form. 
+
+```js
+const convertHex = shortHex => 
+  shortHex[0] == '#' ? ('#' + shortHex.slice(1).split('').map(x => x+x).join('')) : 
+    ('#' + shortHex.split('').map(x => x+x).join(''))
+// convertHex('#03f') -> '#0033ff'
+// convertHex('05a') -> '#0055aa'
+```

From bbd04774f03754c9ad81b70b5e791403ca8a9266 Mon Sep 17 00:00:00 2001
From: Yash Ghelani <yashnghelani@icloud.com>
Date: Fri, 15 Dec 2017 21:03:53 +0530
Subject: [PATCH 06/29] Fix broken link

---
 README.md | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/README.md b/README.md
index 776d746ef..5393cf1c8 100644
--- a/README.md
+++ b/README.md
@@ -967,7 +967,7 @@ const speak = message => {
 [⬆ back to top](#table-of-contents)
 ## Node
 
-### Write a JSON to a file
+### Write JSON to file
 
 Use `fs.writeFile()`, template literals and `JSON.stringify()` to write a `json` object to a `.json` file.
 

From 3c48c3b5d8d19b29c4e5b0e534d1c10beab1e20f Mon Sep 17 00:00:00 2001
From: Justin Lee <justinlee0022@gmail.com>
Date: Fri, 15 Dec 2017 07:39:39 -0800
Subject: [PATCH 07/29] Added compose such that the rightmost function may have
 any arity. Added spread operator to explanation of pipe.

---
 snippets/compose.md | 14 ++++++++++++++
 snippets/pipe.md    |  2 +-
 2 files changed, 15 insertions(+), 1 deletion(-)
 create mode 100644 snippets/compose.md

diff --git a/snippets/compose.md b/snippets/compose.md
new file mode 100644
index 000000000..90088ebe2
--- /dev/null
+++ b/snippets/compose.md
@@ -0,0 +1,14 @@
+### Compose
+
+Use `Array.reduce()` with the spread operator (`...`) to perform right-to-;eft function composition.
+The last (rightmost) function can accept one or more arguments; the remaining functions must be unary.
+
+```js
+const compose = (...fns) => fns.reduce((f, g) => (...args) => f(g(...args)));
+/*
+const add5 = x => x + 5
+const multiply = (x, y) => x * y
+const multiplyAndAdd5 = compose(add5, multiply)
+multiplyAndAdd5(5, 2) -> 15
+*/
+```
diff --git a/snippets/pipe.md b/snippets/pipe.md
index e5136777b..434b4c0c3 100644
--- a/snippets/pipe.md
+++ b/snippets/pipe.md
@@ -1,6 +1,6 @@
 ### Pipe
 
-Use `Array.reduce()` to perform left-to-right function composition.
+Use `Array.reduce()` with the spread operator (`...`) to perform left-to-right function composition.
 The first (leftmost) function can accept one or more arguments; the remaining functions must be unary.
 
 ```js

From fd3ef95ab3ba1f69ae3a8cae42c564ab558292f3 Mon Sep 17 00:00:00 2001
From: Justin Lee <justinlee0022@gmail.com>
Date: Fri, 15 Dec 2017 08:44:13 -0800
Subject: [PATCH 08/29] Modified zip to use spread operator instead of
 Array.apply

---
 snippets/array-zip.md | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/snippets/array-zip.md b/snippets/array-zip.md
index 6c9a2491b..5c3193605 100644
--- a/snippets/array-zip.md
+++ b/snippets/array-zip.md
@@ -6,7 +6,7 @@ If lengths of the argument-arrays vary, `undefined` is used where no value could
 
 ```js
 const zip = (...arrays) => {
-  const maxLength = Math.max.apply(null, arrays.map(a => a.length));
+  const maxLength = Math.max(...arrays.map(x => x.length));
   return Array.from({length: maxLength}).map((_, i) => {
    return Array.from({length: arrays.length}, (_, k) => arrays[k][i]);
   })

From d03271b73386399ef0f17c0d8246e99eab2a198d Mon Sep 17 00:00:00 2001
From: Eduardo Cancino <ecancino@users.noreply.github.com>
Date: Fri, 15 Dec 2017 11:44:53 -0500
Subject: [PATCH 09/29] Update initialize-array-with-range.md

---
 snippets/initialize-array-with-range.md | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/snippets/initialize-array-with-range.md b/snippets/initialize-array-with-range.md
index def23fb9c..a601ddbb1 100644
--- a/snippets/initialize-array-with-range.md
+++ b/snippets/initialize-array-with-range.md
@@ -5,6 +5,6 @@ You can omit `start` to use a default value of `0`.
 
 ```js
 const initializeArrayRange = (end, start = 0) =>
-  Array.apply(null, Array(end - start)).map((v, i) => i + start);
+  Array.from({ length: end - start }).map((v, i) => i + start)
 // initializeArrayRange(5) -> [0,1,2,3,4]
 ```

From fb24d54bf1778af402b75c272c8a4880c50a7452 Mon Sep 17 00:00:00 2001
From: iamsoorena <s.soorena@gmail.com>
Date: Fri, 15 Dec 2017 20:18:18 +0330
Subject: [PATCH 10/29] change description for clean json object function to
 explain more about it's inner workings.

---
 snippets/clean-json-objects.md | 10 +++++-----
 1 file changed, 5 insertions(+), 5 deletions(-)

diff --git a/snippets/clean-json-objects.md b/snippets/clean-json-objects.md
index 2835b37fd..5268e3911 100644
--- a/snippets/clean-json-objects.md
+++ b/snippets/clean-json-objects.md
@@ -1,7 +1,7 @@
 ### Clean Json objects
 
-Clean your json object from unwanted keys, deeply.
-provide set of `keys` to keep and an indicator for `children` if there is any.
+Use `Object.keys()` method to iter through given json object and deleting keys that are not `include`d in given array.
+also if you give it a special key(`childIndicator`) it will search deeply inside it to apply function to inner objects too.
 
 ```js
 const cleanObj = (obj, keys = [], childIndicator) => {
@@ -14,8 +14,8 @@ const cleanObj = (obj, keys = [], childIndicator) => {
   })
 }
 /*
-  dirtyObj = {a: 1, b: 2, children: {a: 1, b: 2}}
-  cleanObj(dirtyObj, ["a"],"children")
-  console.log(dirtyObj)// { a: 1, children : { a: 1}}
+  testObj = {a: 1, b: 2, children: {a: 1, b: 2}}
+  cleanObj(testObj, ["a"],"children")
+  console.log(testObj)// { a: 1, children : { a: 1}}
 */
 ```

From 68a2c3a7e87c4164c03471a1864b94dd579fb799 Mon Sep 17 00:00:00 2001
From: iamsoorena <s.soorena@gmail.com>
Date: Fri, 15 Dec 2017 20:23:23 +0330
Subject: [PATCH 11/29] refactoring grammatical problems and assigning better
 name to keys argument.

---
 snippets/clean-json-objects.md | 8 ++++----
 1 file changed, 4 insertions(+), 4 deletions(-)

diff --git a/snippets/clean-json-objects.md b/snippets/clean-json-objects.md
index 5268e3911..5af7b6221 100644
--- a/snippets/clean-json-objects.md
+++ b/snippets/clean-json-objects.md
@@ -1,14 +1,14 @@
 ### Clean Json objects
 
-Use `Object.keys()` method to iter through given json object and deleting keys that are not `include`d in given array.
+Use `Object.keys()` method to loop over given json object and deleting keys that are not `include`d in given array.
 also if you give it a special key(`childIndicator`) it will search deeply inside it to apply function to inner objects too.
 
 ```js
-const cleanObj = (obj, keys = [], childIndicator) => {
+const cleanObj = (obj, keysToKeep = [], childIndicator) => {
   Object.keys(obj).forEach(key => {
     if (key === childIndicator) {
-      cleanObj(obj[key], keys, childIndicator)
-    } else if (!keys.includes(key)) {
+      cleanObj(obj[key], keysToKeep, childIndicator)
+    } else if (!keysToKeep.includes(key)) {
       delete obj[key]
     }
   })

From bd3ed7103b693007827efde9ffe4539f8c52c6a0 Mon Sep 17 00:00:00 2001
From: iamsoorena <s.soorena@gmail.com>
Date: Fri, 15 Dec 2017 20:41:36 +0330
Subject: [PATCH 12/29] adding read file to array function

---
 snippets/read-file-to-array.md | 19 +++++++++++++++++++
 tag_database                   |  1 +
 2 files changed, 20 insertions(+)
 create mode 100644 snippets/read-file-to-array.md

diff --git a/snippets/read-file-to-array.md b/snippets/read-file-to-array.md
new file mode 100644
index 000000000..451e2dd06
--- /dev/null
+++ b/snippets/read-file-to-array.md
@@ -0,0 +1,19 @@
+### Read a file to an Array
+
+Use `readFileSync` function in `fs` node package to create a `Buffer` from a file.
+convert buffer to string using `toString(encoding)` function.
+creating an array from contents of file by `split`ing file content line by line(each `\n`).
+
+  ```js
+const fs = require('fs');
+const readFileToArray = filename => fs.readFileSync(filename).toString('UTF8').split('\n');
+/*
+  contents of test.txt :
+    line1
+    line2
+    line3
+    ___________________________
+  let arr = readFileToArray('test.txt')
+  console.log(arr) // -> ['line1', 'line2', 'line3']
+ */
+```
\ No newline at end of file
diff --git a/tag_database b/tag_database
index 3acb709f1..8f05fb386 100644
--- a/tag_database
+++ b/tag_database
@@ -67,6 +67,7 @@ powerset:math
 promisify:function
 random-integer-in-range:utility
 random-number-in-range:utility
+read-file-to-array:node
 redirect-to-URL:browser
 reverse-a-string:string
 RGB-to-hexadecimal:utility

From 1f2edeac153d807ac60fbd5a70c410acabb25767 Mon Sep 17 00:00:00 2001
From: iamsoorena <s.soorena@gmail.com>
Date: Fri, 15 Dec 2017 21:24:55 +0330
Subject: [PATCH 13/29] adding function that make a new array containing every
 nth element of a given array.

---
 snippets/take-every-nth-element.md | 10 ++++++++++
 tag_database                       |  1 +
 2 files changed, 11 insertions(+)
 create mode 100644 snippets/take-every-nth-element.md

diff --git a/snippets/take-every-nth-element.md b/snippets/take-every-nth-element.md
new file mode 100644
index 000000000..26bffd8de
--- /dev/null
+++ b/snippets/take-every-nth-element.md
@@ -0,0 +1,10 @@
+### Take every nth element of an array
+
+Use `Array.filter()` to create a new array that contains every nth element of a given array.
+
+```js
+const everynth = (arr, nth) => arr.filter((e, i) => i % nth === 0)
+/*
+ console.log(everynth([1,2,3,4,5,6], 2)) // -> [ 1, 3, 5 ]
+*/
+```
diff --git a/tag_database b/tag_database
index 3acb709f1..6199d7b59 100644
--- a/tag_database
+++ b/tag_database
@@ -85,6 +85,7 @@ swap-values-of-two-variables:utility
 tail-of-list:array
 take-right:array
 take:array
+take-every-nth-element:array
 truncate-a-string:string
 unique-values-of-array:array
 URL-parameters:utility

From 2e37a71e8bcae4966fc857ae213650640288b49b Mon Sep 17 00:00:00 2001
From: Gabriel Bonner <17228243+gabrielbonner@users.noreply.github.com>
Date: Fri, 15 Dec 2017 10:46:46 -0800
Subject: [PATCH 14/29] Fix array.concat snippet

Correct return value
---
 snippets/array-concatenation.md | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/snippets/array-concatenation.md b/snippets/array-concatenation.md
index 40bf43c29..a77b50327 100644
--- a/snippets/array-concatenation.md
+++ b/snippets/array-concatenation.md
@@ -4,5 +4,5 @@ Use `Array.concat()` to concatenate an array with any additional arrays and/or v
 
 ```js
 const ArrayConcat = (arr, ...args) => [].concat(arr, ...args); 
-// ArrayConcat([1], [1, 2, 3, [4]]) -> [1, 2, 3, [4]]
+// ArrayConcat([1], [1, 2, 3, [4]]) -> [1, 1, 2, 3, [4]]
 ```

From df840befc537bf56489d86f103d1bcd7a4e48f00 Mon Sep 17 00:00:00 2001
From: Anx <anxsec@gmail.com>
Date: Sat, 16 Dec 2017 15:02:07 +0800
Subject: [PATCH 15/29] Update array-concatenation.md

---
 snippets/array-concatenation.md | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/snippets/array-concatenation.md b/snippets/array-concatenation.md
index 40bf43c29..a77b50327 100644
--- a/snippets/array-concatenation.md
+++ b/snippets/array-concatenation.md
@@ -4,5 +4,5 @@ Use `Array.concat()` to concatenate an array with any additional arrays and/or v
 
 ```js
 const ArrayConcat = (arr, ...args) => [].concat(arr, ...args); 
-// ArrayConcat([1], [1, 2, 3, [4]]) -> [1, 2, 3, [4]]
+// ArrayConcat([1], [1, 2, 3, [4]]) -> [1, 1, 2, 3, [4]]
 ```

From 2c8667f347bb2e5c76c82caefe5617252d391ae0 Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?S=C3=A9bastien?= <demsking@gmail.com>
Date: Sat, 16 Dec 2017 08:21:49 +0100
Subject: [PATCH 16/29] Fix `Write json to file` anchor

---
 README.md | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/README.md b/README.md
index 776d746ef..57f54e56d 100644
--- a/README.md
+++ b/README.md
@@ -85,7 +85,7 @@
 * [Speech synthesis (experimental)](#speech-synthesis-experimental)
 
 ### Node
-* [Write json to file](#write-json-to-file)
+* [Write json to file](#write-a-json-to-a-file)
 
 ### Object
 * [Object from key value pairs](#object-from-key-value-pairs)

From 73016da6c7ef33674c3b9db0ebb322d498fc578d Mon Sep 17 00:00:00 2001
From: Yahya SayadArbabi <yahya.arbabi@gmail.com>
Date: Sat, 16 Dec 2017 10:53:43 +0330
Subject: [PATCH 17/29] Fix Write json to file link

---
 README.md | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/README.md b/README.md
index 776d746ef..57f54e56d 100644
--- a/README.md
+++ b/README.md
@@ -85,7 +85,7 @@
 * [Speech synthesis (experimental)](#speech-synthesis-experimental)
 
 ### Node
-* [Write json to file](#write-json-to-file)
+* [Write json to file](#write-a-json-to-a-file)
 
 ### Object
 * [Object from key value pairs](#object-from-key-value-pairs)

From 3e8d595511133797861fa6cd8240a89dd648c241 Mon Sep 17 00:00:00 2001
From: Soorena <s.soorena@gmail.com>
Date: Sat, 16 Dec 2017 13:30:55 +0330
Subject: [PATCH 18/29] updating array-without.md for more terse implementation
 and resolving a bug in the comment

a bug in comments(forgotten parentheses) resolved.
and `Array.indexOf() === -1 ` changed to `Array.includes()`
---
 snippets/array-without.md | 6 +++---
 1 file changed, 3 insertions(+), 3 deletions(-)

diff --git a/snippets/array-without.md b/snippets/array-without.md
index dd657fe2a..b5b41aee8 100644
--- a/snippets/array-without.md
+++ b/snippets/array-without.md
@@ -1,9 +1,9 @@
 ### Array without
 
-Use `Array.filter()` to create an array excluding all given values.
+Use `Array.filter()` to create an array excluding(using `!Array.includes()`) all given values.
 
 ```js
-const without = (arr, ...args) => arr.filter(v => args.indexOf(v) === -1);
-// without[2, 1, 2, 3], 1, 2) -> [3]
+const without = (arr, ...args) => arr.filter(v => !args.includes(v));
+// without([2, 1, 2, 3], 1, 2) -> [3]
 // without([2, 1, 2, 3, 4, 5, 5, 5, 3, 2, 7, 7], 3, 1, 5, 2) -> [ 4, 7, 7 ]
 ```

From 1b2ae33831ac436aa1cb65e3354a5affb5d818f3 Mon Sep 17 00:00:00 2001
From: Soorena <s.soorena@gmail.com>
Date: Sat, 16 Dec 2017 13:41:55 +0330
Subject: [PATCH 19/29] updating array conactenation example to use ES6

---
 snippets/array-concatenation.md | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/snippets/array-concatenation.md b/snippets/array-concatenation.md
index 40bf43c29..692f29ce1 100644
--- a/snippets/array-concatenation.md
+++ b/snippets/array-concatenation.md
@@ -1,8 +1,8 @@
 ### Array concatenation
 
-Use `Array.concat()` to concatenate an array with any additional arrays and/or values, specified in `args`.
+Use Array spread operators to concatenate an array with any additional arrays and/or values, specified in `args`.
 
 ```js
-const ArrayConcat = (arr, ...args) => [].concat(arr, ...args); 
+const ArrayConcat = (arr, ...args) => [...arr,...args]; 
 // ArrayConcat([1], [1, 2, 3, [4]]) -> [1, 2, 3, [4]]
 ```

From 2e13210c8207915afa08e1730dd7567b33de07f5 Mon Sep 17 00:00:00 2001
From: Naman Sachdeva <namansachdevaa@gmail.com>
Date: Sat, 16 Dec 2017 16:04:26 +0530
Subject: [PATCH 20/29] Rename write-json-to-file.md to
 write-a-json-to-a-file.md

---
 snippets/{write-json-to-file.md => write-a-json-to-a-file.md} | 0
 1 file changed, 0 insertions(+), 0 deletions(-)
 rename snippets/{write-json-to-file.md => write-a-json-to-a-file.md} (100%)

diff --git a/snippets/write-json-to-file.md b/snippets/write-a-json-to-a-file.md
similarity index 100%
rename from snippets/write-json-to-file.md
rename to snippets/write-a-json-to-a-file.md

From c3fb3a65a143ebf229e93c3078ad5b24d8a8659f Mon Sep 17 00:00:00 2001
From: Angelos Chalaris <chalarangelo@gmail.com>
Date: Sat, 16 Dec 2017 13:03:46 +0200
Subject: [PATCH 21/29] Build

---
 README.md                                                     | 2 +-
 snippets/{write-a-json-to-a-file.md => write-json-to-file.md} | 2 +-
 tag_database                                                  | 2 +-
 3 files changed, 3 insertions(+), 3 deletions(-)
 rename snippets/{write-a-json-to-a-file.md => write-json-to-file.md} (92%)

diff --git a/README.md b/README.md
index 1091edc7c..76e9af825 100644
--- a/README.md
+++ b/README.md
@@ -85,7 +85,7 @@
 * [Speech synthesis (experimental)](#speech-synthesis-experimental)
 
 ### Node
-* [Write json to file](#write-a-json-to-a-file)
+* [Write JSON to file](#write-json-to-file)
 
 ### Object
 * [Object from key value pairs](#object-from-key-value-pairs)
diff --git a/snippets/write-a-json-to-a-file.md b/snippets/write-json-to-file.md
similarity index 92%
rename from snippets/write-a-json-to-a-file.md
rename to snippets/write-json-to-file.md
index 17de5a44e..587e5f0f1 100644
--- a/snippets/write-a-json-to-a-file.md
+++ b/snippets/write-json-to-file.md
@@ -1,4 +1,4 @@
-### Write a JSON to a file
+### Write JSON to file
 
 Use `fs.writeFile()`, template literals and `JSON.stringify()` to write a `json` object to a `.json` file.
 
diff --git a/tag_database b/tag_database
index 3acb709f1..bf8f8003b 100644
--- a/tag_database
+++ b/tag_database
@@ -92,4 +92,4 @@ UUID-generator:utility
 validate-email:utility
 validate-number:utility
 value-or-default:utility
-write-json-to-file:node
+write-JSON-to-file:node

From 055646fdb61d30a1f72f14e698eeab0b9f2b0357 Mon Sep 17 00:00:00 2001
From: Angelos Chalaris <chalarangelo@gmail.com>
Date: Sat, 16 Dec 2017 13:33:43 +0200
Subject: [PATCH 22/29] Update array-concatenation.md

---
 snippets/array-concatenation.md | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/snippets/array-concatenation.md b/snippets/array-concatenation.md
index 692f29ce1..31e915bfc 100644
--- a/snippets/array-concatenation.md
+++ b/snippets/array-concatenation.md
@@ -1,6 +1,6 @@
 ### Array concatenation
 
-Use Array spread operators to concatenate an array with any additional arrays and/or values, specified in `args`.
+Use Array spread operators (`...`) to concatenate an array with any additional arrays and/or values, specified in `args`.
 
 ```js
 const ArrayConcat = (arr, ...args) => [...arr,...args]; 

From a7f9e284a38864cc4df8641ca8f5f4d2dff2455c Mon Sep 17 00:00:00 2001
From: Angelos Chalaris <chalarangelo@gmail.com>
Date: Sat, 16 Dec 2017 13:35:24 +0200
Subject: [PATCH 23/29] Update take-every-nth-element.md

---
 snippets/take-every-nth-element.md | 6 ++----
 1 file changed, 2 insertions(+), 4 deletions(-)

diff --git a/snippets/take-every-nth-element.md b/snippets/take-every-nth-element.md
index 26bffd8de..639fb0e6c 100644
--- a/snippets/take-every-nth-element.md
+++ b/snippets/take-every-nth-element.md
@@ -3,8 +3,6 @@
 Use `Array.filter()` to create a new array that contains every nth element of a given array.
 
 ```js
-const everynth = (arr, nth) => arr.filter((e, i) => i % nth === 0)
-/*
- console.log(everynth([1,2,3,4,5,6], 2)) // -> [ 1, 3, 5 ]
-*/
+const everynth = (arr, nth) => arr.filter((e, i) => i % nth === 0);
+// everynth([1,2,3,4,5,6], 2) -> [ 1, 3, 5 ]
 ```

From 69e8f840753b54184f735ca3f379765bf9d1ad63 Mon Sep 17 00:00:00 2001
From: Angelos Chalaris <chalarangelo@gmail.com>
Date: Sat, 16 Dec 2017 13:40:52 +0200
Subject: [PATCH 24/29] Update 3DigHexcode-to-6DigHexcode.md

---
 snippets/3DigHexcode-to-6DigHexcode.md | 5 ++---
 1 file changed, 2 insertions(+), 3 deletions(-)

diff --git a/snippets/3DigHexcode-to-6DigHexcode.md b/snippets/3DigHexcode-to-6DigHexcode.md
index d424f41cd..2e9b9b8fc 100644
--- a/snippets/3DigHexcode-to-6DigHexcode.md
+++ b/snippets/3DigHexcode-to-6DigHexcode.md
@@ -1,12 +1,11 @@
 ### 3DigHexcode to 6DigHexcode
 
-Use `Array.map()` to map the array created by `String.split()` and `Array.join()` to join 
-the mapped array for converting a three-digit RGB notated hexadecimal colorcode to the six-digit form. 
+Use `Array.map()`, `split()` and `Array.join()` to join the mapped array for converting a three-digit RGB notated hexadecimal colorcode to the six-digit form. 
 
 ```js
 const convertHex = shortHex => 
   shortHex[0] == '#' ? ('#' + shortHex.slice(1).split('').map(x => x+x).join('')) : 
-    ('#' + shortHex.split('').map(x => x+x).join(''))
+    ('#' + shortHex.split('').map(x => x+x).join(''));
 // convertHex('#03f') -> '#0033ff'
 // convertHex('05a') -> '#0055aa'
 ```

From 0b844e4b3abbda87b55398f6b57f63dfd1e567d7 Mon Sep 17 00:00:00 2001
From: Angelos Chalaris <chalarangelo@gmail.com>
Date: Sat, 16 Dec 2017 13:43:15 +0200
Subject: [PATCH 25/29] Update and rename compose.md to compose-functions.md

---
 snippets/{compose.md => compose-functions.md} | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)
 rename snippets/{compose.md => compose-functions.md} (95%)

diff --git a/snippets/compose.md b/snippets/compose-functions.md
similarity index 95%
rename from snippets/compose.md
rename to snippets/compose-functions.md
index 90088ebe2..718755719 100644
--- a/snippets/compose.md
+++ b/snippets/compose-functions.md
@@ -1,4 +1,4 @@
-### Compose
+### Compose functions
 
 Use `Array.reduce()` with the spread operator (`...`) to perform right-to-;eft function composition.
 The last (rightmost) function can accept one or more arguments; the remaining functions must be unary.

From e0ae406574db1cfd4bb67360d3778832a6b48d1e Mon Sep 17 00:00:00 2001
From: Angelos Chalaris <chalarangelo@gmail.com>
Date: Sat, 16 Dec 2017 13:56:55 +0200
Subject: [PATCH 26/29] Housekeeping, tag and build

---
 README.md                                     | 89 ++++++++++++++++---
 ... => 3-digit-hexcode-to-6-digit-hexcode.md} |  8 +-
 snippets/initialize-array-with-range.md       |  2 +-
 snippets/{pipe.md => pipe-functions.md}       |  2 +-
 ...rray.md => read-file-as-array-of-lines.md} |  4 +-
 snippets/take-every-nth-element.md            |  2 +-
 tag_database                                  |  8 +-
 7 files changed, 92 insertions(+), 23 deletions(-)
 rename snippets/{3DigHexcode-to-6DigHexcode.md => 3-digit-hexcode-to-6-digit-hexcode.md} (73%)
 rename snippets/{pipe.md => pipe-functions.md} (95%)
 rename snippets/{read-file-to-array.md => read-file-as-array-of-lines.md} (93%)

diff --git a/README.md b/README.md
index 76e9af825..b40db071e 100644
--- a/README.md
+++ b/README.md
@@ -44,6 +44,7 @@
 * [Similarity between arrays](#similarity-between-arrays)
 * [Sum of array of numbers](#sum-of-array-of-numbers)
 * [Tail of list](#tail-of-list)
+* [Take every nth element](#take-every-nth-element)
 * [Take right](#take-right)
 * [Take](#take)
 * [Unique values of array](#unique-values-of-array)
@@ -61,8 +62,9 @@
 
 ### Function
 * [Chain asynchronous functions](#chain-asynchronous-functions)
+* [Compose functions](#compose-functions)
 * [Curry](#curry)
-* [Pipe](#pipe)
+* [Pipe functions](#pipe-functions)
 * [Promisify](#promisify)
 * [Run promises in series](#run-promises-in-series)
 * [Sleep](#sleep)
@@ -85,6 +87,7 @@
 * [Speech synthesis (experimental)](#speech-synthesis-experimental)
 
 ### Node
+* [Read file as array of lines](#read-file-as-array-of-lines)
 * [Write JSON to file](#write-json-to-file)
 
 ### Object
@@ -102,6 +105,7 @@
 * [Truncate a string](#truncate-a-string)
 
 ### Utility
+* [3 digit hexcode to 6 digit hexcode](#3-digit-hexcode-to-6-digit-hexcode)
 * [Escape regular expression](#escape-regular-expression)
 * [Get native type of value](#get-native-type-of-value)
 * [Hexcode to RGB](#hexcode-to-rgb)
@@ -128,11 +132,11 @@
 
 ### Array concatenation
 
-Use `Array.concat()` to concatenate an array with any additional arrays and/or values, specified in `args`.
+Use Array spread operators (`...`) to concatenate an array with any additional arrays and/or values, specified in `args`.
 
 ```js
-const ArrayConcat = (arr, ...args) => [].concat(arr, ...args); 
-// ArrayConcat([1], [1, 2, 3, [4]]) -> [1, 2, 3, [4]]
+const ArrayConcat = (arr, ...args) => [...arr,...args]; 
+// ArrayConcat([1], [1, 2, 3, [4]]) -> [1, 1, 2, 3, [4]]
 ```
 
 [⬆ back to top](#table-of-contents)
@@ -213,11 +217,11 @@ const union = (a, b) => Array.from(new Set([...a, ...b]));
 
 ### Array without
 
-Use `Array.filter()` to create an array excluding all given values.
+Use `Array.filter()` to create an array excluding(using `!Array.includes()`) all given values.
 
 ```js
-const without = (arr, ...args) => arr.filter(v => args.indexOf(v) === -1);
-// without[2, 1, 2, 3], 1, 2) -> [3]
+const without = (arr, ...args) => arr.filter(v => !args.includes(v));
+// without([2, 1, 2, 3], 1, 2) -> [3]
 // without([2, 1, 2, 3, 4, 5, 5, 5, 3, 2, 7, 7], 3, 1, 5, 2) -> [ 4, 7, 7 ]
 ```
 
@@ -231,7 +235,7 @@ If lengths of the argument-arrays vary, `undefined` is used where no value could
 
 ```js
 const zip = (...arrays) => {
-  const maxLength = Math.max.apply(null, arrays.map(a => a.length));
+  const maxLength = Math.max(...arrays.map(x => x.length));
   return Array.from({length: maxLength}).map((_, i) => {
    return Array.from({length: arrays.length}, (_, k) => arrays[k][i]);
   })
@@ -434,7 +438,7 @@ You can omit `start` to use a default value of `0`.
 
 ```js
 const initializeArrayRange = (end, start = 0) =>
-  Array.apply(null, Array(end - start)).map((v, i) => i + start);
+  Array.from({ length: end - start }).map((v, i) => i + start);
 // initializeArrayRange(5) -> [0,1,2,3,4]
 ```
 
@@ -551,6 +555,17 @@ const tail = arr => arr.length > 1 ? arr.slice(1) : arr;
 
 [⬆ back to top](#table-of-contents)
 
+### Take every nth element
+
+Use `Array.filter()` to create a new array that contains every nth element of a given array.
+
+```js
+const everynth = (arr, nth) => arr.filter((e, i) => i % nth === 0);
+// everynth([1,2,3,4,5,6], 2) -> [ 1, 3, 5 ]
+```
+
+[⬆ back to top](#table-of-contents)
+
 ### Take right
 
 Use `Array.slice()` to create a slice of the array with `n` elements taken from the end.
@@ -707,6 +722,22 @@ chainAsync([
 
 [⬆ back to top](#table-of-contents)
 
+### Compose functions
+
+Use `Array.reduce()` to perform right-to-left function composition.
+The last (rightmost) function can accept one or more arguments; the remaining functions must be unary.
+
+```js
+const compose = (...fns) => fns.reduce((f, g) => (...args) => f(g(...args)));
+/*
+const add5 = x => x + 5
+const multiply = (x, y) => x * y
+const multiplyAndAdd5 = compose(add5, multiply)
+multiplyAndAdd5(5, 2) -> 15
+*/
+```
+[⬆ back to top](#table-of-contents)
+
 ### Curry
 
 Use recursion.
@@ -725,9 +756,9 @@ const curry = (fn, arity = fn.length, ...args) =>
 
 [⬆ back to top](#table-of-contents)
 
-### Pipe
+### Pipe functions
 
-Use `Array.reduce()` to perform left-to-right function composition.
+Use `Array.reduce()` with the spread operator (`...`) to perform left-to-right function composition.
 The first (leftmost) function can accept one or more arguments; the remaining functions must be unary.
 
 ```js
@@ -967,6 +998,28 @@ const speak = message => {
 [⬆ back to top](#table-of-contents)
 ## Node
 
+### Read file as array of lines
+
+Use `readFileSync` function in `fs` node package to create a `Buffer` from a file.
+convert buffer to string using `toString(encoding)` function.
+creating an array from contents of file by `split`ing file content line by line(each `\n`).
+
+  ```js
+const fs = require('fs');
+const readFileToArray = filename => fs.readFileSync(filename).toString('UTF8').split('\n');
+/*
+  contents of test.txt :
+    line1
+    line2
+    line3
+    ___________________________
+  let arr = readFileToArray('test.txt')
+  console.log(arr) // -> ['line1', 'line2', 'line3']
+ */
+```
+
+[⬆ back to top](#table-of-contents)
+
 ### Write JSON to file
 
 Use `fs.writeFile()`, template literals and `JSON.stringify()` to write a `json` object to a `.json` file.
@@ -1114,6 +1167,20 @@ const truncate = (str, num) =>
 [⬆ back to top](#table-of-contents)
 ## Utility
 
+### 3-digit hexcode to 6-digit hexcode
+
+Use `Array.map()`, `split()` and `Array.join()` to join the mapped array for converting a three-digit RGB notated hexadecimal colorcode to the six-digit form.
+
+```js
+const convertHex = shortHex =>
+  shortHex[0] == '#' ? ('#' + shortHex.slice(1).split('').map(x => x+x).join('')) :
+    ('#' + shortHex.split('').map(x => x+x).join(''));
+// convertHex('#03f') -> '#0033ff'
+// convertHex('05a') -> '#0055aa'
+```
+
+[⬆ back to top](#table-of-contents)
+
 ### Escape regular expression
 
 Use `replace()` to escape special characters.
diff --git a/snippets/3DigHexcode-to-6DigHexcode.md b/snippets/3-digit-hexcode-to-6-digit-hexcode.md
similarity index 73%
rename from snippets/3DigHexcode-to-6DigHexcode.md
rename to snippets/3-digit-hexcode-to-6-digit-hexcode.md
index 2e9b9b8fc..a138b34bb 100644
--- a/snippets/3DigHexcode-to-6DigHexcode.md
+++ b/snippets/3-digit-hexcode-to-6-digit-hexcode.md
@@ -1,10 +1,10 @@
-### 3DigHexcode to 6DigHexcode
+### 3-digit hexcode to 6-digit hexcode
 
-Use `Array.map()`, `split()` and `Array.join()` to join the mapped array for converting a three-digit RGB notated hexadecimal colorcode to the six-digit form. 
+Use `Array.map()`, `split()` and `Array.join()` to join the mapped array for converting a three-digit RGB notated hexadecimal colorcode to the six-digit form.
 
 ```js
-const convertHex = shortHex => 
-  shortHex[0] == '#' ? ('#' + shortHex.slice(1).split('').map(x => x+x).join('')) : 
+const convertHex = shortHex =>
+  shortHex[0] == '#' ? ('#' + shortHex.slice(1).split('').map(x => x+x).join('')) :
     ('#' + shortHex.split('').map(x => x+x).join(''));
 // convertHex('#03f') -> '#0033ff'
 // convertHex('05a') -> '#0055aa'
diff --git a/snippets/initialize-array-with-range.md b/snippets/initialize-array-with-range.md
index a601ddbb1..082325699 100644
--- a/snippets/initialize-array-with-range.md
+++ b/snippets/initialize-array-with-range.md
@@ -5,6 +5,6 @@ You can omit `start` to use a default value of `0`.
 
 ```js
 const initializeArrayRange = (end, start = 0) =>
-  Array.from({ length: end - start }).map((v, i) => i + start)
+  Array.from({ length: end - start }).map((v, i) => i + start);
 // initializeArrayRange(5) -> [0,1,2,3,4]
 ```
diff --git a/snippets/pipe.md b/snippets/pipe-functions.md
similarity index 95%
rename from snippets/pipe.md
rename to snippets/pipe-functions.md
index 434b4c0c3..6e34e1063 100644
--- a/snippets/pipe.md
+++ b/snippets/pipe-functions.md
@@ -1,4 +1,4 @@
-### Pipe
+### Pipe functions
 
 Use `Array.reduce()` with the spread operator (`...`) to perform left-to-right function composition.
 The first (leftmost) function can accept one or more arguments; the remaining functions must be unary.
diff --git a/snippets/read-file-to-array.md b/snippets/read-file-as-array-of-lines.md
similarity index 93%
rename from snippets/read-file-to-array.md
rename to snippets/read-file-as-array-of-lines.md
index 451e2dd06..c64b61c6f 100644
--- a/snippets/read-file-to-array.md
+++ b/snippets/read-file-as-array-of-lines.md
@@ -1,4 +1,4 @@
-### Read a file to an Array
+### Read file as array of lines
 
 Use `readFileSync` function in `fs` node package to create a `Buffer` from a file.
 convert buffer to string using `toString(encoding)` function.
@@ -16,4 +16,4 @@ const readFileToArray = filename => fs.readFileSync(filename).toString('UTF8').s
   let arr = readFileToArray('test.txt')
   console.log(arr) // -> ['line1', 'line2', 'line3']
  */
-```
\ No newline at end of file
+```
diff --git a/snippets/take-every-nth-element.md b/snippets/take-every-nth-element.md
index 639fb0e6c..8db496353 100644
--- a/snippets/take-every-nth-element.md
+++ b/snippets/take-every-nth-element.md
@@ -1,4 +1,4 @@
-### Take every nth element of an array
+### Take every nth element
 
 Use `Array.filter()` to create a new array that contains every nth element of a given array.
 
diff --git a/tag_database b/tag_database
index 34efb5b8c..0e529695e 100644
--- a/tag_database
+++ b/tag_database
@@ -1,3 +1,4 @@
+3-digit-hexcode-to-6-digit-hexcode:utility
 anagrams-of-string-(with-duplicates):string
 array-concatenation:array
 array-difference:array
@@ -17,6 +18,7 @@ check-for-palindrome:string
 chunk-array:array
 collatz-algorithm:math
 compact:array
+compose-functions:function
 count-occurrences-of-a-value-in-array:array
 current-URL:browser
 curry:function
@@ -62,12 +64,12 @@ object-to-key-value-pairs:object
 ordinal-suffix-of-number:utility
 percentile:math
 pick:array
-pipe:function
+pipe-functions:function
 powerset:math
 promisify:function
 random-integer-in-range:utility
 random-number-in-range:utility
-read-file-to-array:node
+read-file-as-array-of-lines:node
 redirect-to-URL:browser
 reverse-a-string:string
 RGB-to-hexadecimal:utility
@@ -84,9 +86,9 @@ standard-deviation:math
 sum-of-array-of-numbers:array
 swap-values-of-two-variables:utility
 tail-of-list:array
+take-every-nth-element:array
 take-right:array
 take:array
-take-every-nth-element:array
 truncate-a-string:string
 unique-values-of-array:array
 URL-parameters:utility

From 46ca8b33b770c00285cb6d4cbff33a66ed63be2b Mon Sep 17 00:00:00 2001
From: Angelos Chalaris <chalarangelo@gmail.com>
Date: Sat, 16 Dec 2017 14:22:08 +0200
Subject: [PATCH 27/29] Removed swap

---
 README.md                                | 12 ------------
 snippets/swap-values-of-two-variables.md |  8 --------
 tag_database                             |  1 -
 3 files changed, 21 deletions(-)
 delete mode 100644 snippets/swap-values-of-two-variables.md

diff --git a/README.md b/README.md
index b40db071e..51eefca5a 100644
--- a/README.md
+++ b/README.md
@@ -121,7 +121,6 @@
 * [Random integer in range](#random-integer-in-range)
 * [Random number in range](#random-number-in-range)
 * [RGB to hexadecimal](#rgb-to-hexadecimal)
-* [Swap values of two variables](#swap-values-of-two-variables)
 * [URL parameters](#url-parameters)
 * [UUID generator](#uuid-generator)
 * [Validate email](#validate-email)
@@ -1367,17 +1366,6 @@ const rgbToHex = (r, g, b) => ((r << 16) + (g << 8) + b).toString(16).padStart(6
 
 [⬆ back to top](#table-of-contents)
 
-### Swap values of two variables
-
-Use array destructuring to swap values between two variables.
-
-```js
-[varA, varB] = [varB, varA];
-// [x, y] = [y, x]
-```
-
-[⬆ back to top](#table-of-contents)
-
 ### URL parameters
 
 Use `match()` with an appropriate regular expression to get all key-value pairs, `Array.reduce()` to map and combine them into a single object.
diff --git a/snippets/swap-values-of-two-variables.md b/snippets/swap-values-of-two-variables.md
deleted file mode 100644
index bb2f67150..000000000
--- a/snippets/swap-values-of-two-variables.md
+++ /dev/null
@@ -1,8 +0,0 @@
-### Swap values of two variables
-
-Use array destructuring to swap values between two variables.
-
-```js
-[varA, varB] = [varB, varA];
-// [x, y] = [y, x]
-```
diff --git a/tag_database b/tag_database
index 0e529695e..cbf76124d 100644
--- a/tag_database
+++ b/tag_database
@@ -84,7 +84,6 @@ sort-characters-in-string-(alphabetical):string
 speech-synthesis-(experimental):media
 standard-deviation:math
 sum-of-array-of-numbers:array
-swap-values-of-two-variables:utility
 tail-of-list:array
 take-every-nth-element:array
 take-right:array

From 4fc9b6904a6d66afbb4b0bb1fb13f0a5e1a11f9f Mon Sep 17 00:00:00 2001
From: Angelos Chalaris <chalarangelo@gmail.com>
Date: Sat, 16 Dec 2017 14:24:50 +0200
Subject: [PATCH 28/29] Tag and build

---
 README.md                                     | 25 +++++++++++++++++++
 ...n-json-objects.md => clean-JSON-object.md} |  6 ++---
 tag_database                                  |  1 +
 3 files changed, 29 insertions(+), 3 deletions(-)
 rename snippets/{clean-json-objects.md => clean-JSON-object.md} (85%)

diff --git a/README.md b/README.md
index 51eefca5a..c15a1a0cb 100644
--- a/README.md
+++ b/README.md
@@ -91,6 +91,7 @@
 * [Write JSON to file](#write-json-to-file)
 
 ### Object
+* [Clean JSON object](#clean-json-object)
 * [Object from key value pairs](#object-from-key-value-pairs)
 * [Object to key value pairs](#object-to-key-value-pairs)
 * [Shallow clone object](#shallow-clone-object)
@@ -1032,6 +1033,30 @@ const jsonToFile = (obj, filename) => fs.writeFile(`${filename}.json`, JSON.stri
 [⬆ back to top](#table-of-contents)
 ## Object
 
+### Clean JSON object
+
+Use `Object.keys()` method to loop over given json object and deleting keys that are not `include`d in given array.
+also if you give it a special key(`childIndicator`) it will search deeply inside it to apply function to inner objects too.
+
+```js
+const cleanObj = (obj, keysToKeep = [], childIndicator) => {
+  Object.keys(obj).forEach(key => {
+    if (key === childIndicator) {
+      cleanObj(obj[key], keysToKeep, childIndicator);
+    } else if (!keysToKeep.includes(key)) {
+      delete obj[key];
+    }
+  })
+}
+/*
+  testObj = {a: 1, b: 2, children: {a: 1, b: 2}}
+  cleanObj(testObj, ["a"],"children")
+  console.log(testObj)// { a: 1, children : { a: 1}}
+*/
+```
+
+[⬆ back to top](#table-of-contents)
+
 ### Object from key-value pairs
 
 Use `Array.reduce()` to create and combine key-value pairs.
diff --git a/snippets/clean-json-objects.md b/snippets/clean-JSON-object.md
similarity index 85%
rename from snippets/clean-json-objects.md
rename to snippets/clean-JSON-object.md
index 5af7b6221..241f6ce09 100644
--- a/snippets/clean-json-objects.md
+++ b/snippets/clean-JSON-object.md
@@ -1,4 +1,4 @@
-### Clean Json objects
+### Clean JSON object
 
 Use `Object.keys()` method to loop over given json object and deleting keys that are not `include`d in given array.
 also if you give it a special key(`childIndicator`) it will search deeply inside it to apply function to inner objects too.
@@ -7,9 +7,9 @@ also if you give it a special key(`childIndicator`) it will search deeply inside
 const cleanObj = (obj, keysToKeep = [], childIndicator) => {
   Object.keys(obj).forEach(key => {
     if (key === childIndicator) {
-      cleanObj(obj[key], keysToKeep, childIndicator)
+      cleanObj(obj[key], keysToKeep, childIndicator);
     } else if (!keysToKeep.includes(key)) {
-      delete obj[key]
+      delete obj[key];
     }
   })
 }
diff --git a/tag_database b/tag_database
index cbf76124d..9f1b18f46 100644
--- a/tag_database
+++ b/tag_database
@@ -16,6 +16,7 @@ capitalize-first-letter:string
 chain-asynchronous-functions:function
 check-for-palindrome:string
 chunk-array:array
+clean-JSON-object:object
 collatz-algorithm:math
 compact:array
 compose-functions:function

From 0ebfd8ab39d97a63ca8aab46482944967a418626 Mon Sep 17 00:00:00 2001
From: Angelos Chalaris <chalarangelo@gmail.com>
Date: Sat, 16 Dec 2017 14:28:58 +0200
Subject: [PATCH 29/29] Update and rename convert-json-date.md to
 json-to-date.md

---
 snippets/{convert-json-date.md => json-to-date.md} | 4 +---
 1 file changed, 1 insertion(+), 3 deletions(-)
 rename snippets/{convert-json-date.md => json-to-date.md} (64%)

diff --git a/snippets/convert-json-date.md b/snippets/json-to-date.md
similarity index 64%
rename from snippets/convert-json-date.md
rename to snippets/json-to-date.md
index 3c0d276dc..7e5efcdc7 100644
--- a/snippets/convert-json-date.md
+++ b/snippets/json-to-date.md
@@ -1,7 +1,5 @@
-### Convert Json Date
+### JSON to date
  
-Convert dates coming from ajax as json to readable format
-Example: converts "/Date(1489525200000)/" to "15/2/2017"
  
  ```js
 cconst JsonToDate = arr =>