diff --git a/README.md b/README.md index a464bbcd4..e5ef8965e 100644 --- a/README.md +++ b/README.md @@ -676,7 +676,7 @@ const sum = pipeAsyncFunctions( x => x + 3, async x => (await x) + 4 ); -(async () => { +(async() => { console.log(await sum(5)); // 15 (after one second) })(); ``` @@ -2321,9 +2321,9 @@ 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); + }, []) : []; ``` @@ -5504,8 +5504,8 @@ 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); @@ -5906,7 +5906,7 @@ midpoint([1, 3], [2, 4]); // [1.5, 3.5] Returns the minimum value of an array, after mapping each element to a value using the provided function. -Use `Array.prototype.map()` to map each element to the value returned by `fn`, `Math.min()` to get the maximum value. +Use `Array.prototype.map()` to map each element to the value returned by `fn`, `Math.min()` to get the minimum value. ```js const minBy = (arr, fn) => Math.min(...arr.map(typeof fn === 'function' ? fn : val => val[fn])); @@ -6809,11 +6809,11 @@ 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; ``` @@ -6887,9 +6887,9 @@ 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 002459fc2..7ed734395 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 55d7cb9a2..b2a9ca352 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 b29f95b92..ea60b10ff 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);
@@ -236,7 +236,7 @@ own individual rating by supplying it as the third argument.
 
midpoint([2, 2], [4, 4]); // [3, 3]
 midpoint([4, 4], [6, 6]); // [5, 5]
 midpoint([1, 3], [2, 4]); // [1.5, 3.5]
-

minBy

Returns the minimum value of an array, after mapping each element to a value using the provided function.

Use Array.prototype.map() to map each element to the value returned by fn, Math.min() to get the maximum value.

const minBy = (arr, fn) => Math.min(...arr.map(typeof fn === 'function' ? fn : val => val[fn]));
+

minBy

Returns the minimum value of an array, after mapping each element to a value using the provided function.

Use Array.prototype.map() to map each element to the value returned by fn, Math.min() to get the minimum value.

const minBy = (arr, fn) => Math.min(...arr.map(typeof fn === 'function' ? fn : val => val[fn]));
 
minBy([{ n: 4 }, { n: 2 }, { n: 8 }, { n: 6 }], o => o.n); // 2
 minBy([{ n: 4 }, { n: 2 }, { n: 8 }, { n: 6 }], 'n'); // 2

percentile

Uses the percentile formula to calculate how many numbers in the given array are less or equal to the given value.

Use Array.prototype.reduce() to calculate how many numbers are below the value and how many are the same value and apply the percentile formula.

const percentile = (arr, val) =>
diff --git a/docs/object.html b/docs/object.html
index 195ff9755..7308197ff 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 970453bdc..c736420ee 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 c97559833..737130b6e 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 86ebe69b6..cf3acc9cc 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 8c93add3b..47d6f620c 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 a8c472774..58de9c2e0 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 6de78dab9..ad3b141de 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);
@@ -990,9 +990,9 @@ 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) =>