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    <p>If by JavaScript you also include versions newer than version 1.5, then you could also see the following:</p> <hr> <p><strong>Expression closures:</strong></p> <p>JavaScript 1.7 and older:</p> <pre><code>var square = function(x) { return x * x; } </code></pre> <p>JavaScript 1.8 added a shorthand <a href="http://en.wikipedia.org/wiki/Lambda_calculus#Lambda_calculus_and_programming_languages">Lambda notation</a> for writing simple functions with <a href="https://developer.mozilla.org/en/JavaScript/New_in_JavaScript/1.8#Expression_closures_%28Merge_into_own_page.2fsection%29">expression closures</a>:</p> <pre><code>var square = function(x) x * x; </code></pre> <hr> <p><strong>reduce() method:</strong></p> <p>JavaScript 1.8 also introduces the <a href="https://developer.mozilla.org/En/Core_JavaScript_1.5_Reference/Global_Objects/Array/Reduce">reduce()</a> method to Arrays:</p> <pre><code>var total = [0, 1, 2, 3].reduce(function(a, b){ return a + b; }); // total == 6 </code></pre> <hr> <p><strong>Destructuring assignment:</strong></p> <p>In JavaScript 1.7, you can use the <a href="https://developer.mozilla.org/en/New_in_JavaScript_1.7#Destructuring_assignment_%28Merge_into_own_page.2fsection%29">destructuring assignment</a>, for example, to swap values avoiding temporary variables:</p> <pre><code>var a = 1; var b = 3; [a, b] = [b, a]; </code></pre> <hr> <p><strong>Array Comprehensions and the filter() method:</strong> </p> <p><a href="https://developer.mozilla.org/en/JavaScript/Guide/Predefined_Core_Objects#Array_comprehensions">Array Comprehensions</a> were introduced in JavaScript 1.7 which can reduce the following code:</p> <pre><code>var numbers = [1, 2, 3, 21, 22, 30]; var evens = []; for (var i = 0; i &lt; numbers.length; i++) { if (numbers[i] % 2 === 0) { evens.push(numbers[i]); } } </code></pre> <p>To something like this:</p> <pre><code>var numbers = [1, 2, 3, 21, 22, 30]; var evens = [i for each(i in numbers) if (i % 2 === 0)]; </code></pre> <p>Or using the <a href="https://developer.mozilla.org/en/JavaScript/Reference/Global_Objects/Array/filter"><code>filter()</code></a> method in Arrays which was introduced in JavaScript 1.6:</p> <pre><code>var numbers = [1, 2, 3, 21, 22, 30]; var evens = numbers.filter(function(i) { return i % 2 === 0; }); </code></pre>
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    1. POIs there a good JS shorthand reference out there?
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    1. USDaniel Vassallo
    1. USDaniel Vassallo
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    1. COi don't think any minifier would do any of this... :)
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      1. USgalambalazs
    2. CO@galambalazs: No, I don't think so as well. It would be incorrect for the minifier to do that, because such conversions would make code incompatible in engines that support versions 1.5 of JavaScript... Nevertheless, these are still a few options to shorten code in later versions, probably more for readability purposes rather than for minification.
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    3. CO@galambalazs: I didn't interpret the question that way :) ... The OP asks: "I'd like to incorporate whatever shorthand techniques there are in my regular coding habits..."
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