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var empty=[];
var numbers=[‘zero’,’one’,’two’,’three’,’four’,’five’,’six’,’seven’,’eight’,’nine’];
empty[1]                                   //undefined
numbers[1]                                //’one’
empty.length                            //0
numbers.length                         //10
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JavaScript¾«´â¶ÁÊé±Ê¼Ç(2)

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JavaScript¾«´â¶ÁÊé±Ê¼Ç(3)

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