var a = [1,2,3];
var b = a;
a = [4,5,6];
alert(b); //[1,2,3]
===========================================
var a = [1,2,3];
var b = a;
a.pop();
alert(b); //[1,2]
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var a = [1,2,3];
var b = a;
a = [4,5,6];
alert(b); //[1,2,3]
===========================================
var a = [1,2,3];
var b = a;
a.pop();
alert(b); //[1,2]
相关文章：