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如创建一个数组
var myarr=new Array(9);
由于数组长度可以动态调整,作用并不大,你写的语句只是创建了一个制定长度的数组。
由于数组长度可以动态调整,作用并不大,你写的语句只是创建了一个制定长度的数组。