JavaScript: Difference between revisions

Revision as of 02:42, 3 June 2012

Revision as of 06:20, 3 June 2012

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; object based: JavaScript is almost entirely [[object-based]]. JavaScript [[Object (computer science)|objects]] are [[associative array]]s, augmented with prototypes (see below). Object property names are string keys: <code>obj.x&nbsp;=&nbsp;10</code> and <code>obj['x']&nbsp;=&nbsp;10</code> are equivalent, the dot notation being [[syntactic sugar]]. Properties and their values can be added, changed, or deleted at run-time. Most properties of an object (and those on its prototype inheritance chain) can be enumerated using a <code>for...in</code> loop. JavaScript has a small number of built-in objects such as <code>Function</code> and <code>Date</code>.

; run-time evaluation: JavaScript includes an <code>[[eval]]</code> function that can execute statements provided as strings at run-time.

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===Functional===