krisnod · August 29, 2015 14:27 · Aug 16, 2015 · Aug 14, 2015 · Aug 8, 2015 · Aug 8, 2015
diff --git a/arrayzing.md b/arrayzing.md
@@ -71,7 +71,7 @@ Or
 
 ```javascript
 var meals = ['breakfast', 'lunch', 'dinner'];
-meals.slice(-1);
+meals.slice(-1)[0];
 // 'dinner'
 ```
 
@@ -284,7 +284,7 @@ meals.forEach(function(currentValue, index, arr){
 ```javascript
 var meals = ['breakfast', 'lunch', 'dinner', 'supper'];
 
-meals.filter(function() (item) {
+meals.filter(function(item) {
   return item !== 'breakfast';
 });
 // ['lunch', 'dinner', 'supper'];

diff --git a/arrayzing.md b/arrayzing.md
@@ -44,7 +44,7 @@ var meals = ['breakfast', 'lunch', 'dinner'] ;
 ## Empty an array
 
 ```javascript
-var meals = new Array('breakfast', 'lunch', 'dinner');
+var meals = ['breakfast', 'lunch', 'dinner'];
 meals.length = 0
 ```
 

diff --git a/arrayzing.md b/arrayzing.md
@@ -53,7 +53,7 @@ meals.length = 0
 ```javascript
 var meals = ['breakfast', 'lunch', 'dinner'];
 
-var copy = meals.slice(0, meals.length);
+var copy = meals.slice();
 // ['breakfast', 'lunch', 'dinner']
 ```
 
@@ -337,16 +337,17 @@ meals.push('afternoon tea');
 ```javascript
 var meals = ['breakfast', 'elevenses', 'brunch'];
 
-function inArray(arr, query){
+function inArray(arr, item){
   var found = -1,
       len = arr.length, 
-      i = 0; 
+      i = len; 
 
-  for(; i < len; i++){
+  while(--i) {
     if(arr[i] === query){
       found = i;
     }
   }
+
   return found;
 }
 

diff --git a/arrayzing.md b/arrayzing.md
@@ -15,7 +15,6 @@ This is a work-in-progress cheatsheet for JS arrays. Please feel free to leave a
 * [Remove single item at a specific index](#user-content-remove-single-item-at-a-specific-index)
 * [Remove several items](#user-content-remove-several-items)
 * [Reverse an array](#user-content-reverse-an-array)
-* [Randomise an array](#user-content-randomise-an-array)
 * [Delimit an array](#user-content-delimit-an-array)
 * [Sort in numerical order](#user-content-sort-in-numerical-order)
 * [Sort in alphabetical order](#user-content-sort-in-alphabetical-order)
@@ -33,6 +32,7 @@ This is a work-in-progress cheatsheet for JS arrays. Please feel free to leave a
 * [Find index of an item](#user-content-find-index-of-an-item)
  * [ES4 and below](#user-content-es4-and-below-1)
  * [ES5 and above](#user-content-es5-and-above-1)
+* [Randomise an array](#user-content-randomise-an-array)
 * [Chaining Methods](#chaining-methods)
 
 ## Create an array
@@ -183,30 +183,6 @@ meals.reverse();
 // ['dinner', 'lunch', 'breakfast'];
 ```
 
-## Randomise an array
-
-```javascript
-function randomiseArray(arr) {
-    var buffer = [], start;
-
-    for(var i = arr.length; i >= arr.length && i > 0;i--) {
-        start = Math.floor(Math.random() * arr.length);
-        buffer.push(arr.splice(start, 1)[0])
-    };
-
-    return buffer;
-}
-
-randomiseArray([0,1,2,3,4]);
-// [2,1,0,3,4]
-
-randomiseArray([0,1,2,3,4]);
-// [3,2,1,4,0]
-
-randomiseArray([0,1,2,3,4]);
-// [1,2,4,0,3]
-```
-
 ## Delimit an array
 
 ```javascript
@@ -389,6 +365,30 @@ meals.indexOf('brunch');
 // 2
 ```
 
+## Randomise an array
+
+```javascript
+function randomiseArray(arr) {
+    var buffer = [], start;
+
+    for(var i = arr.length; i >= arr.length && i > 0;i--) {
+        start = Math.floor(Math.random() * arr.length);
+        buffer.push(arr.splice(start, 1)[0])
+    };
+
+    return buffer;
+}
+
+randomiseArray([0,1,2,3,4]);
+// [2,1,0,3,4]
+
+randomiseArray([0,1,2,3,4]);
+// [3,2,1,4,0]
+
+randomiseArray([0,1,2,3,4]);
+// [1,2,4,0,3]
+```
+
 # Chaining methods
 
 ```javascript

diff --git a/arrayzing.md b/arrayzing.md
@@ -41,12 +41,6 @@ This is a work-in-progress cheatsheet for JS arrays. Please feel free to leave a
 var meals = ['breakfast', 'lunch', 'dinner'] ;
 ```
 
-Or
-
-```javascript
-var meals = new Array('breakfast', 'lunch', 'dinner');
-```
-
 ## Empty an array
 
 ```javascript

diff --git a/arrayzing.md b/arrayzing.md
@@ -17,8 +17,8 @@ This is a work-in-progress cheatsheet for JS arrays. Please feel free to leave a
 * [Reverse an array](#user-content-reverse-an-array)
 * [Randomise an array](#user-content-randomise-an-array)
 * [Delimit an array](#user-content-delimit-an-array)
-* [Sort in alphabetical/numerical order](#user-content-sort-in-alphabeticalnumerical-order)
-* [Sort in reverse alphabetical/numerical order](#user-content-sort-in-reverse-alphabeticalnumerical-order)
+* [Sort in numerical order](#user-content-sort-in-numerical-order)
+* [Sort in alphabetical order](#user-content-sort-in-alphabetical-order)
 * [Join two arrays together](#user-content-join-two-arrays-together)
 * [Copy specific item(s)](#user-content-copy-specific-items)
 * [Augment items within an array](#user-content-augment-items-within-an-array)

diff --git a/arrayzing.md b/arrayzing.md
@@ -223,29 +223,25 @@ meals.join(' AND ');
 // 'breakfast AND lunch AND dinner'
 ```
 
-## Sort in alphabetical/numerical order
+## Sort in alphabetical order
 
 ```javascript
 
-var meals = ['breakfast', 'lunch', 'dinner'];
+var meals = ['dinner', 'supper', 'breakfast', 'lunch'];
 
 meals.sort();
-// ['breakfast', 'dinner', 'lunch']
+// ['breakfast', 'dinner', 'lunch', 'supper']
 ```
 
-## Sort in reverse alphabetical/numerical order
+## Sort in numerical order
 
 ```javascript
-[0, 1, 2, 3, 4, 5, 6].sort(function(a, b) {
-  return b > a;
-});
-// [6, 5, 4, 3, 2, 1, 0]
-```
+var numbers = [1438,2605,794,3947,6241,11745,2585];
 
-Or
-```javascript
-[0, 1, 2, 3, 4, 5, 6].sort().reverse();
-// [6, 5, 4, 3, 2, 1, 0]
+numbers.sort(function(a, b) {
+    return a - b;
+});
+// [794,1438,2585,2605,3947,6241,11745]
 ```
 
 ## Join two arrays together

diff --git a/arrayzing.md b/arrayzing.md
@@ -87,7 +87,7 @@ meals.slice(-1);
 
 var meals = ['breakfast', 'lunch', 'dinner'];
 
-['breakfast', 'lunch', 'dinner'].shift();
+meals.shift();
 // 'breakfast'
 
 meals;

diff --git a/arrayzing.md b/arrayzing.md
@@ -1,6 +1,6 @@
 # Arrayzing - The JavaScript array cheatsheet
 
-This is a WIP cheatsheet to help those on get a little stuck when.
+This is a work-in-progress cheatsheet for JS arrays. Please feel free to leave a comment if this has helped you or you would like to suggest anything.
 
 * [Create an array](#user-content-create-an-array)
 * [Empty an array](#user-content-empty-an-array)

diff --git a/LICENSE b/LICENSE
@@ -0,0 +1,20 @@
+The MIT License (MIT)
+
+Copyright (c) 2015 Justin Perry
+
+Permission is hereby granted, free of charge, to any person obtaining a copy of
+this software and associated documentation files (the "Software"), to deal in
+the Software without restriction, including without limitation the rights to
+use, copy, modify, merge, publish, distribute, sublicense, and/or sell copies of
+the Software, and to permit persons to whom the Software is furnished to do so,
+subject to the following conditions:
+
+The above copyright notice and this permission notice shall be included in all
+copies or substantial portions of the Software.
+
+THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, FITNESS
+FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR
+COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER
+IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
+CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
diff --git a/arrayzing.md b/arrayzing.md
@@ -1,5 +1,7 @@
 # Arrayzing - The JavaScript array cheatsheet
 
+This is a WIP cheatsheet to help those on get a little stuck when.
+
 * [Create an array](#user-content-create-an-array)
 * [Empty an array](#user-content-empty-an-array)
 * [Clone an array](#user-content-clone-an-array)
@@ -451,4 +453,4 @@ getMealsByMaxCalories(meals, 850, 2000);
   }
 ]
 */
-```
+```
diff --git a/arrayzing.md b/arrayzing.md
@@ -1,4 +1,4 @@
-# Array Cheatsheet
+# Arrayzing - The JavaScript array cheatsheet
 
 * [Create an array](#user-content-create-an-array)
 * [Empty an array](#user-content-empty-an-array)

diff --git a/arrayzing.md b/arrayzing.md
@@ -191,28 +191,24 @@ meals.reverse();
 
 ```javascript
 function randomiseArray(arr) {
-    if(Object.prototype.toString.call(arr) !== '[object Array]') return;
-
-    var copy = arr.slice(0, arr.length),
-        buffer = [],
-        start;
+    var buffer = [], start;
 
-    for(var i = copy.length; i >= copy.length && i > 0;i--) {
-        start = parseInt(Math.random() * copy.length, 16);
-        buffer.push(copy.splice(start, 1)[0])
+    for(var i = arr.length; i >= arr.length && i > 0;i--) {
+        start = Math.floor(Math.random() * arr.length);
+        buffer.push(arr.splice(start, 1)[0])
     };
 
     return buffer;
 }
 
-randomiseArray(arr);
+randomiseArray([0,1,2,3,4]);
 // [2,1,0,3,4]
 
-randomiseArray(arr);
+randomiseArray([0,1,2,3,4]);
 // [3,2,1,4,0]
 
-randomiseArray(arr);
-// [1,2,4,0,2]
+randomiseArray([0,1,2,3,4]);
+// [1,2,4,0,3]
 ```
 
 ## Delimit an array

diff --git a/arrayzing.md b/arrayzing.md
@@ -58,8 +58,6 @@ meals.length = 0
 var meals = ['breakfast', 'lunch', 'dinner'];
 
 var copy = meals.slice(0, meals.length);
-
-copy;
 // ['breakfast', 'lunch', 'dinner']
 ```
 

diff --git a/arrayzing.md b/arrayzing.md
@@ -52,6 +52,17 @@ var meals = new Array('breakfast', 'lunch', 'dinner');
 meals.length = 0
 ```
 
+## Clone an array
+
+```javascript
+var meals = ['breakfast', 'lunch', 'dinner'];
+
+var copy = meals.slice(0, meals.length);
+
+copy;
+// ['breakfast', 'lunch', 'dinner']
+```
+
 ## Get last item
 
 ```javascript

diff --git a/arrayzing.md b/arrayzing.md
@@ -1,8 +1,9 @@
 # Array Cheatsheet
 
-* [Create an array](#user-content-creating-an-array)
+* [Create an array](#user-content-create-an-array)
 * [Empty an array](#user-content-empty-an-array)
-* [Get last item](#user-content-getting-last-item)
+* [Clone an array](#user-content-clone-an-array)
+* [Get last item](#user-content-get-last-item)
 * [Remove first item](#user-content-remove-first-item)
 * [Remove last item](#user-content-remove-last-item)
 * [Add new item(s) to beginning](#user-content-add-new-items-to-beginning)
@@ -32,7 +33,7 @@
  * [ES5 and above](#user-content-es5-and-above-1)
 * [Chaining Methods](#chaining-methods)
 
-## Creating an array
+## Create an array
 
 ```javascript
 var meals = ['breakfast', 'lunch', 'dinner'] ;
@@ -51,7 +52,7 @@ var meals = new Array('breakfast', 'lunch', 'dinner');
 meals.length = 0
 ```
 
-## Getting last item
+## Get last item
 
 ```javascript
 

diff --git a/arrayzing.md b/arrayzing.md
@@ -197,8 +197,10 @@ function randomiseArray(arr) {
 
 randomiseArray(arr);
 // [2,1,0,3,4]
+
 randomiseArray(arr);
 // [3,2,1,4,0]
+
 randomiseArray(arr);
 // [1,2,4,0,2]
 ```

diff --git a/arrayzing.md b/arrayzing.md
@@ -181,13 +181,26 @@ meals.reverse();
 
 ```javascript
 function randomiseArray(arr) {
-    var buffer = [], start;
-    for(var i = arr.length; i >= arr.length && i > 0;i--) {
-        start = parseInt(Math.random() * arr.length, 16);
-        buffer.push(arr.splice(start,1)[0])
+    if(Object.prototype.toString.call(arr) !== '[object Array]') return;
+
+    var copy = arr.slice(0, arr.length),
+        buffer = [],
+        start;
+
+    for(var i = copy.length; i >= copy.length && i > 0;i--) {
+        start = parseInt(Math.random() * copy.length, 16);
+        buffer.push(copy.splice(start, 1)[0])
     };
+
     return buffer;
 }
+
+randomiseArray(arr);
+// [2,1,0,3,4]
+randomiseArray(arr);
+// [3,2,1,4,0]
+randomiseArray(arr);
+// [1,2,4,0,2]
 ```
 
 ## Delimit an array

diff --git a/arrayzing.md b/arrayzing.md
@@ -12,6 +12,7 @@
 * [Remove single item at a specific index](#user-content-remove-single-item-at-a-specific-index)
 * [Remove several items](#user-content-remove-several-items)
 * [Reverse an array](#user-content-reverse-an-array)
+* [Randomise an array](#user-content-randomise-an-array)
 * [Delimit an array](#user-content-delimit-an-array)
 * [Sort in alphabetical/numerical order](#user-content-sort-in-alphabeticalnumerical-order)
 * [Sort in reverse alphabetical/numerical order](#user-content-sort-in-reverse-alphabeticalnumerical-order)
@@ -176,6 +177,19 @@ meals.reverse();
 // ['dinner', 'lunch', 'breakfast'];
 ```
 
+## Randomise an array
+
+```javascript
+function randomiseArray(arr) {
+    var buffer = [], start;
+    for(var i = arr.length; i >= arr.length && i > 0;i--) {
+        start = parseInt(Math.random() * arr.length, 16);
+        buffer.push(arr.splice(start,1)[0])
+    };
+    return buffer;
+}
+```
+
 ## Delimit an array
 
 ```javascript

diff --git a/arrayzing.md b/arrayzing.md
@@ -296,6 +296,8 @@ var meals = ['breakfast', 'lunch', 'dinner'];
 function isArray(arr) {
   return !!(Object.prototype.toString.call(arr) === '[object Array]');
 }
+
+isArray(meals);
 // true
 ```
 

diff --git a/arrayzing.md b/arrayzing.md
@@ -5,8 +5,8 @@
 * [Get last item](#user-content-getting-last-item)
 * [Remove first item](#user-content-remove-first-item)
 * [Remove last item](#user-content-remove-last-item)
-* [Add new item(s) to beginning](#user-content-add-new-item-to-beginning)
-* [Add new item(s) to end](#user-content-add-new-item-to-end)
+* [Add new item(s) to beginning](#user-content-add-new-items-to-beginning)
+* [Add new item(s) to end](#user-content-add-new-items-to-end)
 * [Overwrite item at a specific index](#user-content-overwrite-item-at-a-specific-index)
 * [Add new item(s) at a specific index](#user-content-add-new-items-at-a-specific-index)
 * [Remove single item at a specific index](#user-content-remove-single-item-at-a-specific-index)

diff --git a/arrayzing.md b/arrayzing.md
@@ -5,8 +5,8 @@
 * [Get last item](#user-content-getting-last-item)
 * [Remove first item](#user-content-remove-first-item)
 * [Remove last item](#user-content-remove-last-item)
-* [Add new item to beginning](#user-content-add-new-item-to-beginning)
-* [Add new item to end](#user-content-add-new-item-to-end)
+* [Add new item(s) to beginning](#user-content-add-new-item-to-beginning)
+* [Add new item(s) to end](#user-content-add-new-item-to-end)
 * [Overwrite item at a specific index](#user-content-overwrite-item-at-a-specific-index)
 * [Add new item(s) at a specific index](#user-content-add-new-items-at-a-specific-index)
 * [Remove single item at a specific index](#user-content-remove-single-item-at-a-specific-index)

diff --git a/arrayzing.md b/arrayzing.md
@@ -23,10 +23,12 @@
 * [Execute a function once per array item](#user-content-execute-a-function-once-per-array-item)
 * [Filter an array](#user-content-filter-an-array)
 * [Detect an array](#user-content-detect-an-array)
-* [Simple FIFO queue](#user-content-simple-fifo-queue)
-* [Find index of an item](#user-content-find-index-of-an-item)
  * [ES4 and below](#user-content-es4-and-below)
  * [ES5 and above](#user-content-es5-and-above)
+* [Simple FIFO queue](#user-content-simple-fifo-queue)
+* [Find index of an item](#user-content-find-index-of-an-item)
+ * [ES4 and below](#user-content-es4-and-below-1)
+ * [ES5 and above](#user-content-es5-and-above-1)
 * [Chaining Methods](#chaining-methods)
 
 ## Creating an array

diff --git a/arrayzing.md b/arrayzing.md
@@ -22,7 +22,7 @@
 * [Return true if at least one item matches a condition](#user-content-return-true-if-at-least-one-item-matches-a-condition)
 * [Execute a function once per array item](#user-content-execute-a-function-once-per-array-item)
 * [Filter an array](#user-content-filter-an-array)
-* [Detect an array[(#user-content-detect-an-array)
+* [Detect an array](#user-content-detect-an-array)
 * [Simple FIFO queue](#user-content-simple-fifo-queue)
 * [Find index of an item](#user-content-find-index-of-an-item)
  * [ES4 and below](#user-content-es4-and-below)

diff --git a/arrayzing.md b/arrayzing.md
@@ -22,6 +22,7 @@
 * [Return true if at least one item matches a condition](#user-content-return-true-if-at-least-one-item-matches-a-condition)
 * [Execute a function once per array item](#user-content-execute-a-function-once-per-array-item)
 * [Filter an array](#user-content-filter-an-array)
+* [Detect an array[(#user-content-detect-an-array)
 * [Simple FIFO queue](#user-content-simple-fifo-queue)
 * [Find index of an item](#user-content-find-index-of-an-item)
  * [ES4 and below](#user-content-es4-and-below)
@@ -90,7 +91,7 @@ meals;
 // ['breakfast', 'lunch'];
 ```
 
-## Add new item to beginning
+## Add new item(s) to beginning
 
 ```javascript
 var meals = ['lunch', 'dinner'];
@@ -102,7 +103,7 @@ meals;
 // ['breakfast', 'lunch', 'dinner']
 ```
 
-## Add new item to end
+## Add new item(s) to end
 
 ```javascript
 
@@ -267,6 +268,7 @@ meals.some(function(item){ return item === 'burgers!!';});
 
 ```javascript
 var meals = ['breakfast', 'lunch', 'dinner', 'supper'];
+
 meals.forEach(function(currentValue, index, arr){
   console.log(index, currentValue, arr);
 });
@@ -282,6 +284,27 @@ meals.filter(function() (item) {
 });
 // ['lunch', 'dinner', 'supper'];
 ```
+## Detect an array
+
+### ES4 and below
+
+```javascript
+var meals = ['breakfast', 'lunch', 'dinner'];
+
+function isArray(arr) {
+  return !!(Object.prototype.toString.call(arr) === '[object Array]');
+}
+// true
+```
+
+### ES5 and above
+
+```javascript
+var meals = ['breakfast', 'lunch', 'dinner'];
+
+Array.isArray(meals)
+// true
+```
 
 ## Simple FIFO queue
 

diff --git a/arrayzing.md b/arrayzing.md
@@ -60,6 +60,7 @@ meals[meals.length - 1];
 Or
 
 ```javascript
+var meals = ['breakfast', 'lunch', 'dinner'];
 meals.slice(-1);
 // 'dinner'
 ```

diff --git a/arrayzing.md b/arrayzing.md
@@ -55,7 +55,11 @@ var meals = ['breakfast', 'lunch', 'dinner'];
 
 meals[meals.length - 1];
 // 'dinner'
+```
+
+Or
 
+```javascript
 meals.slice(-1);
 // 'dinner'
 ```

diff --git a/arrayzing.md b/arrayzing.md
@@ -1,6 +1,7 @@
 # Array Cheatsheet
 
 * [Create an array](#user-content-creating-an-array)
+* [Empty an array](#user-content-empty-an-array)
 * [Get last item](#user-content-getting-last-item)
 * [Remove first item](#user-content-remove-first-item)
 * [Remove last item](#user-content-remove-last-item)
@@ -39,6 +40,13 @@ Or
 var meals = new Array('breakfast', 'lunch', 'dinner');
 ```
 
+## Empty an array
+
+```javascript
+var meals = new Array('breakfast', 'lunch', 'dinner');
+meals.length = 0
+```
+
 ## Getting last item
 
 ```javascript

diff --git a/arrayzing.md b/arrayzing.md
@@ -1,7 +1,7 @@
 # Array Cheatsheet
 
-* [Creating an array](#user-content-creating-an-array)
-* [Getting last item](#user-content-getting-last-item)
+* [Create an array](#user-content-creating-an-array)
+* [Get last item](#user-content-getting-last-item)
 * [Remove first item](#user-content-remove-first-item)
 * [Remove last item](#user-content-remove-last-item)
 * [Add new item to beginning](#user-content-add-new-item-to-beginning)

diff --git a/arrayzing.md b/arrayzing.md
@@ -22,7 +22,7 @@
 * [Execute a function once per array item](#user-content-execute-a-function-once-per-array-item)
 * [Filter an array](#user-content-filter-an-array)
 * [Simple FIFO queue](#user-content-simple-fifo-queue)
-* [Check if an item is in an array](#user-content-check-if-an-item-is-in-an-array)
+* [Find index of an item](#user-content-find-index-of-an-item)
  * [ES4 and below](#user-content-es4-and-below)
  * [ES5 and above](#user-content-es5-and-above)
 * [Chaining Methods](#chaining-methods)
@@ -287,15 +287,15 @@ meals.push('afternoon tea');
 // ... and so on ...
 ```
 
-## Check if an item is in an array
+## Find index of an item
 
 ### ES4 and below
 
 ```javascript
 var meals = ['breakfast', 'elevenses', 'brunch'];
 
 function inArray(arr, query){
-  var found = false,
+  var found = -1,
       len = arr.length, 
       i = 0; 
 
@@ -311,7 +311,7 @@ inArray(meals, 'brunch');
 // 2 - the index of the item in the array
 
 inArray(meals, 'dinner');
-// false
+// -1
 ```
 
 ## ES5 and above
No results found