jquery removes array repeating elements

There's a problem to be aware of.
Arr[j]==i you seem to refer to the equality judgment when an array element is a number type ...
But often we may have to make equality judgments about different types of ... This is the practical application of the problem should be considered

Case of 1!=new number (1)
The situation of null==undefined

0== "0" situation and so on

So obviously simple = = and = = are not suitable.
A Equals method should be implemented independently to make equality judgments ... To set rules based on requirements

var x=[1,1,3,4,5,3];
var y=[];
var tarray=function (I,arr) {
var Yap=false;
for (Var j=0;j<arr.length;j++) {
if (arr[j]==i) {yap=true;break;};
}
if (!yap) Arr.push (i);
};
for (Var t=0;t<x.length;t++) {
Tarray (X[t],y);
}
alert (y.length);
Alert (y.tostring ());