diff --git a/README.md b/README.md index 0fea820f1..029e65dac 100644 --- a/README.md +++ b/README.md @@ -25,6 +25,7 @@ * [30 Seconds of Python](https://github.com/kriadmin/30-seconds-of-python-code) _(unofficial)_ * [30 Seconds of PHP](https://github.com/appzcoder/30-seconds-of-php-code) _(unofficial)_ * [30 Seconds of Kotlin](https://github.com/IvanMwiruki/30-seconds-of-kotlin) _(unofficial)_ +* [30 Seconds of Knowledge](https://chrome.google.com/webstore/detail/30-seconds-of-knowledge/mmgplondnjekobonklacmemikcnhklla) _(unofficial)_ #### Package @@ -673,7 +674,7 @@ const sum = pipeAsyncFunctions( x => x + 3, async x => (await x) + 4 ); -(async() => { +(async () => { console.log(await sum(5)); // 15 (after one second) })(); ``` @@ -2318,9 +2319,9 @@ The `func` is invoked with three arguments (`value, index, array`). const remove = (arr, func) => Array.isArray(arr) ? arr.filter(func).reduce((acc, val) => { - arr.splice(arr.indexOf(val), 1); - return acc.concat(val); - }, []) + arr.splice(arr.indexOf(val), 1); + return acc.concat(val); + }, []) : []; ``` @@ -5501,8 +5502,8 @@ Throws an exception if `n` is a negative number. const factorial = n => n < 0 ? (() => { - throw new TypeError('Negative numbers are not allowed!'); - })() + throw new TypeError('Negative numbers are not allowed!'); + })() : n <= 1 ? 1 : n * factorial(n - 1); @@ -6757,11 +6758,11 @@ const deepMapKeys = (obj, f) => ? obj.map(val => deepMapKeys(val, f)) : typeof obj === 'object' ? Object.keys(obj).reduce((acc, current) => { - const val = obj[current]; - acc[f(current)] = + const val = obj[current]; + acc[f(current)] = val !== null && typeof val === 'object' ? deepMapKeys(val, f) : (acc[f(current)] = val); - return acc; - }, {}) + return acc; + }, {}) : obj; ``` @@ -6835,9 +6836,9 @@ const dig = (obj, target) => target in obj ? obj[target] : Object.values(obj).reduce((acc, val) => { - if (acc !== undefined) return acc; - if (typeof val === 'object') return dig(val, target); - }, undefined); + if (acc !== undefined) return acc; + if (typeof val === 'object') return dig(val, target); + }, undefined); ```
diff --git a/docs/adapter.html b/docs/adapter.html index 9bc525747..10b4fce41 100644 --- a/docs/adapter.html +++ b/docs/adapter.html @@ -133,7 +133,7 @@ Object.assig x => x + 3, async x => (await x) + 4 ); -(async() => { +(async () => { console.log(await sum(5)); // 15 (after one second) })();

Recommended Resource - ES6: The Right Parts

Learn new ES6 JavaScript language features like arrow function, destructuring, generators & more to write cleaner and more productive, readable programs.

pipeFunctions

Performs left-to-right function composition.

Use Array.prototype.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.

const pipeFunctions = (...fns) => fns.reduce((f, g) => (...args) => g(f(...args)));
diff --git a/docs/index.html b/docs/index.html
index dcbb46dad..c95dab963 100644
--- a/docs/index.html
+++ b/docs/index.html
@@ -410,9 +410,9 @@

remove

Removes elements from an array for which the given function returns false.

Use Array.prototype.filter() to find array elements that return truthy values and Array.prototype.reduce() to remove elements using Array.prototype.splice(). The func is invoked with three arguments (value, index, array).

const remove = (arr, func) =>
   Array.isArray(arr)
     ? arr.filter(func).reduce((acc, val) => {
-      arr.splice(arr.indexOf(val), 1);
-      return acc.concat(val);
-    }, [])
+        arr.splice(arr.indexOf(val), 1);
+        return acc.concat(val);
+      }, [])
     : [];
 
remove([1, 2, 3, 4], n => n % 2 === 0); // [2, 4]

sample

Returns a random element from an array.

Use Math.random() to generate a random number, multiply it by length and round it off to the nearest whole number using Math.floor(). This method also works with strings.

const sample = arr => arr[Math.floor(Math.random() * arr.length)];
diff --git a/docs/math.html b/docs/math.html
index 3c1594771..9d264ace2 100644
--- a/docs/math.html
+++ b/docs/math.html
@@ -152,8 +152,8 @@ own individual rating by supplying it as the third argument.

factorial

Calculates the factorial of a number.

Use recursion. If n is less than or equal to 1, return 1. Otherwise, return the product of n and the factorial of n - 1. Throws an exception if n is a negative number.

const factorial = n =>
   n < 0
     ? (() => {
-      throw new TypeError('Negative numbers are not allowed!');
-    })()
+        throw new TypeError('Negative numbers are not allowed!');
+      })()
     : n <= 1
       ? 1
       : n * factorial(n - 1);
diff --git a/docs/object.html b/docs/object.html
index 42e04dbd6..32ddb34ab 100644
--- a/docs/object.html
+++ b/docs/object.html
@@ -139,11 +139,11 @@ o[1? obj.map(val => deepMapKeys(val, f))
     : typeof obj === 'object'
       ? Object.keys(obj).reduce((acc, current) => {
-        const val = obj[current];
-        acc[f(current)] =
+          const val = obj[current];
+          acc[f(current)] =
             val !== null && typeof val === 'object' ? deepMapKeys(val, f) : (acc[f(current)] = val);
-        return acc;
-      }, {})
+          return acc;
+        }, {})
       : obj;
 
const obj = {
   foo: '1',
@@ -178,9 +178,9 @@ o[1in obj
     ? obj[target]
     : Object.values(obj).reduce((acc, val) => {
-      if (acc !== undefined) return acc;
-      if (typeof val === 'object') return dig(val, target);
-    }, undefined);
+        if (acc !== undefined) return acc;
+        if (typeof val === 'object') return dig(val, target);
+      }, undefined);
 
const data = {
   level1: {
     level2: {
diff --git a/snippets/deepMapKeys.md b/snippets/deepMapKeys.md
index c736420ee..970453bdc 100644
--- a/snippets/deepMapKeys.md
+++ b/snippets/deepMapKeys.md
@@ -13,11 +13,11 @@ const deepMapKeys = (obj, f) =>
     ? obj.map(val => deepMapKeys(val, f))
     : typeof obj === 'object'
       ? Object.keys(obj).reduce((acc, current) => {
-        const val = obj[current];
-        acc[f(current)] =
+          const val = obj[current];
+          acc[f(current)] =
             val !== null && typeof val === 'object' ? deepMapKeys(val, f) : (acc[f(current)] = val);
-        return acc;
-      }, {})
+          return acc;
+        }, {})
       : obj;
 ```
 
diff --git a/snippets/dig.md b/snippets/dig.md
index 737130b6e..c97559833 100644
--- a/snippets/dig.md
+++ b/snippets/dig.md
@@ -10,9 +10,9 @@ const dig = (obj, target) =>
   target in obj
     ? obj[target]
     : Object.values(obj).reduce((acc, val) => {
-      if (acc !== undefined) return acc;
-      if (typeof val === 'object') return dig(val, target);
-    }, undefined);
+        if (acc !== undefined) return acc;
+        if (typeof val === 'object') return dig(val, target);
+      }, undefined);
 ```
 
 ```js
diff --git a/snippets/factorial.md b/snippets/factorial.md
index cf3acc9cc..86ebe69b6 100644
--- a/snippets/factorial.md
+++ b/snippets/factorial.md
@@ -11,8 +11,8 @@ Throws an exception if `n` is a negative number.
 const factorial = n =>
   n < 0
     ? (() => {
-      throw new TypeError('Negative numbers are not allowed!');
-    })()
+        throw new TypeError('Negative numbers are not allowed!');
+      })()
     : n <= 1
       ? 1
       : n * factorial(n - 1);
diff --git a/snippets/pipeAsyncFunctions.md b/snippets/pipeAsyncFunctions.md
index 47d6f620c..8c93add3b 100644
--- a/snippets/pipeAsyncFunctions.md
+++ b/snippets/pipeAsyncFunctions.md
@@ -17,7 +17,7 @@ const sum = pipeAsyncFunctions(
   x => x + 3,
   async x => (await x) + 4
 );
-(async() => {
+(async () => {
   console.log(await sum(5)); // 15 (after one second)
 })();
 ```
diff --git a/snippets/remove.md b/snippets/remove.md
index 58de9c2e0..a8c472774 100644
--- a/snippets/remove.md
+++ b/snippets/remove.md
@@ -9,9 +9,9 @@ The `func` is invoked with three arguments (`value, index, array`).
 const remove = (arr, func) =>
   Array.isArray(arr)
     ? arr.filter(func).reduce((acc, val) => {
-      arr.splice(arr.indexOf(val), 1);
-      return acc.concat(val);
-    }, [])
+        arr.splice(arr.indexOf(val), 1);
+        return acc.concat(val);
+      }, [])
     : [];
 ```
 
diff --git a/test/_30s.js b/test/_30s.js
index 4dece075b..670d752fc 100644
--- a/test/_30s.js
+++ b/test/_30s.js
@@ -240,11 +240,11 @@ const deepMapKeys = (obj, f) =>
     ? obj.map(val => deepMapKeys(val, f))
     : typeof obj === 'object'
       ? Object.keys(obj).reduce((acc, current) => {
-        const val = obj[current];
-        acc[f(current)] =
+          const val = obj[current];
+          acc[f(current)] =
             val !== null && typeof val === 'object' ? deepMapKeys(val, f) : (acc[f(current)] = val);
-        return acc;
-      }, {})
+          return acc;
+        }, {})
       : obj;
 const defaults = (obj, ...defs) => Object.assign({}, obj, ...defs.reverse(), obj);
 const defer = (fn, ...args) => setTimeout(fn, 1, ...args);
@@ -267,9 +267,9 @@ const dig = (obj, target) =>
   target in obj
     ? obj[target]
     : Object.values(obj).reduce((acc, val) => {
-      if (acc !== undefined) return acc;
-      if (typeof val === 'object') return dig(val, target);
-    }, undefined);
+        if (acc !== undefined) return acc;
+        if (typeof val === 'object') return dig(val, target);
+      }, undefined);
 const digitize = n => [...`${n}`].map(i => parseInt(i));
 const distance = (x0, y0, x1, y1) => Math.hypot(x1 - x0, y1 - y0);
 const drop = (arr, n = 1) => arr.slice(n);
@@ -341,8 +341,8 @@ const extendHex = shortHex =>
 const factorial = n =>
   n < 0
     ? (() => {
-      throw new TypeError('Negative numbers are not allowed!');
-    })()
+        throw new TypeError('Negative numbers are not allowed!');
+      })()
     : n <= 1
       ? 1
       : n * factorial(n - 1);
@@ -988,9 +988,9 @@ const reject = (pred, array) => array.filter((...args) => !pred(...args));
 const remove = (arr, func) =>
   Array.isArray(arr)
     ? arr.filter(func).reduce((acc, val) => {
-      arr.splice(arr.indexOf(val), 1);
-      return acc.concat(val);
-    }, [])
+        arr.splice(arr.indexOf(val), 1);
+        return acc.concat(val);
+      }, [])
     : [];
 const removeNonASCII = str => str.replace(/[^\x20-\x7E]/g, '');
 const renameKeys = (keysMap, obj) =>