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[·­Òë]High Performance JavaScript(013)

Conditionals  Ìõ¼þ±í´ïʽ
    Similar in nature to loops, conditionals determine how execution flows through JavaScript. The traditional argument of whether to use if-else statements or a switch statement applies to JavaScript just as it does to other languages. Since different b ......

[·­Òë]High Performance JavaScript(021)

Splitting Up Tasks  ·Ö½âÈÎÎñ
    What we typically think of as one task can often be broken down into a series of subtasks. If a single function is taking too long to execute, check to see whether it can be broken down into a series of smaller functions that complete in smaller ......

[·­Òë]High Performance JavaScript(025)

µÚ°ËÕ  Programming Practices  ±à³Ìʵ¼ù
    Every programming language has pain points and inefficient patterns that develop over time. The appearance of these traits occurs as people migrate to the language and start pushing its boundaries. Since 2005, when the term "Ajax" ......

[·­Òë]High Performance JavaScript(033)

Summary  ×ܽá
    When web pages or applications begin to feel slow, analyzing assets as they come over the wire and profiling scripts while they are running allows you to focus your optimization efforts where they are needed most.
    µ±ÍøÒ³»òÓ¦ÓóÌÐò±äÂýʱ£¬·ÖÎ ......

JavaScript±à³Ì±Ê¼Ç

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<script>
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function isNumeric(strNumber) {
var newPar=/^(-|\+)?\d+(\.\d+)?$/
alert(newPar.test(strNumber)); }
 //¼ ......
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