[Guide] Functional Programming: Sort an Array Alphabetically using the sort Method. Fixes and enhancements. (#34678)
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@ -8,7 +8,7 @@ challengeType: 1
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<section id='description'>
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The <code>sort</code> method sorts the elements of an array according to the callback function.
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For example:
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<blockquote>function ascendingOrder(arr) {<br> return arr.sort(function(a, b) {<br> return a - b;<br> });<br>}<br>ascendingOrder([1, 5, 2, 3, 4]);<br>// Returns [1, 2, 3, 4, 5]<br><br>function reverseAlpha(arr) {<br> return arr.sort(function(a, b) {<br> return a === b ? 0 : a < b ? : 1 : -1;<br> });<br>}<br>reverseAlpha(['l', 'h', 'z', 'b', 's']);<br>// Returns ['z', 's', 'l', 'h', 'b']</blockquote>
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<blockquote>function ascendingOrder(arr) {<br> return arr.sort(function(a, b) {<br> return a - b;<br> });<br>}<br>ascendingOrder([1, 5, 2, 3, 4]);<br>// Returns [1, 2, 3, 4, 5]<br><br>function reverseAlpha(arr) {<br> return arr.sort(function(a, b) {<br> return a === b ? 0 : a < b ? 1 : -1;<br> });<br>}<br>reverseAlpha(['l', 'h', 'z', 'b', 's']);<br>// Returns ['z', 's', 'l', 'h', 'b']</blockquote>
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Note: It's encouraged to provide a callback function to specify how to sort the array items. JavaScript's default sorting method is by string Unicode point value, which may return unexpected results.
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</section>
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@ -28,7 +28,7 @@ Using this logic, simply reverse engineer the function to return a new array in
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function alphabeticalOrder(arr) {
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// Add your code below this line
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return arr.sort(function(a,b) {
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return a > b;
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return a !== b ? a < b ? -1 : 1 : 0;
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});
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// Add your code above this line
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}
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