获取数组中倒数某个值的位置代码,ActionScript代码库,德仔网

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【ActionScript】获取数组中倒数某个值的位置

作者: / 发布于2011/1/3/ 1519

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            <pre style="line-height: 150%; font-family: Verdana, Monospace; font-size: 12px; font-weight: bold; margin-right: 10px"><span style="color: #0000ff">function</span> arrLastIndexOf<span style="color: #66cc66">(</span>arr:<span style="color: blue">Array</span>, <span style="color: blue">object</span>:<span style="color: blue">Object</span><span style="color: #66cc66">)</span>:<span style="color: blue">Number</span> <span style="color: #66cc66">{</span>
<span style="color: #0099cc">for</span><span style="color: #66cc66">(</span><span style="color: #0000ff">var</span> i:<span style="color: blue">Number</span> = arr.<span style="color: blue">length</span> - <span style="color: #cc66cc">1</span>; i <span style="color: #66cc66">></span>= <span style="color: #cc66cc">0</span>; i--<span style="color: #66cc66">)</span> <span style="color: #66cc66">{</span>
 <span style="color: #0099cc">if</span><span style="color: #66cc66">(</span>arr<span style="color: #66cc66">[</span>i<span style="color: #66cc66">]</span> == <span style="color: blue">object</span><span style="color: #66cc66">)</span> <span style="color: #66cc66">{</span>
 <span style="color: #0099cc">return</span> i;
 <span style="color: #66cc66">}</span>
<span style="color: #66cc66">}</span>
<span style="color: #0099cc">return</span> <span style="color: #0000ff">null</span>;
<span style="color: #66cc66">}</span>


<span style="color: #0000ff">var</span> arr:<span style="color: blue">Array</span> = <span style="color: #0000ff">new</span> <span style="color: blue">Array</span><span style="color: #66cc66">(</span><span style="color: #ff0000">"a"</span>, <span style="color: #ff0000">"b"</span>, <span style="color: #ff0000">"c"</span>, <span style="color: #ff0000">"a"</span>, <span style="color: #ff0000">"b"</span>, <span style="color: #ff0000">"c"</span><span style="color: #66cc66">)</span>;
<span style="color: blue">trace</span><span style="color: #66cc66">(</span>arrLastIndexOf<span style="color: #66cc66">(</span>arr, <span style="color: #ff0000">"a"</span><span style="color: #66cc66">)</span><span style="color: #66cc66">)</span>; <span style="font-style: italic; color: #808080">//outputs 3</span>
<span style="color: blue">trace</span><span style="color: #66cc66">(</span>arrLastIndexOf<span style="color: #66cc66">(</span>arr, <span style="color: #ff0000">"c"</span><span style="color: #66cc66">)</span><span style="color: #66cc66">)</span>; <span style="font-style: italic; color: #808080">//outputs 5</span></pre>
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