var ary=[1,2,3,4];
function fn(ary){
ary[0]=0;
ary=[0];
ary[0]=100;
return ary;
}
var res=fn(ary);//res
console.log(ary);
console.log(res);
var ary=[1,2,3,4];
function fn(ary){
ary[0]=0;
ary=[0];
ary[0]=100;
return ary;
}
var res=fn(ary);//res
console.log(ary);
console.log(res);var ary=[1,2,3,4];
function fn(ary){
ary[0]=0;//
ary=[0];//
ary[0]=100;//
return ary;
}
var res=fn(ary);//res
console.log(ary);//
console.log(res);function is also an object, which is a reference data type, and when assigned, it passes a reference value, which is equivalent to an address.
var res=fn;//res
//
var res = fn(ary)// fn(ary) res
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