for循环indexof()
var a=[1, 2, 2, 3, 4, 2, 2,5,36,4,78,3,3,3,3];
var b=[];
for (var i =0; i <a.length; i++) {
if(b.indexOf(a[i])==-1 && a.indexOf(a[i])!==a.lastIndexOf(a[i])){
b.push(a[i]);
}
}
console.log(b);
微信扫一扫
for循环indexof()
var a=[1, 2, 2, 3, 4, 2, 2,5,36,4,78,3,3,3,3];
var b=[];
for (var i =0; i <a.length; i++) {
if(b.indexOf(a[i])==-1 && a.indexOf(a[i])!==a.lastIndexOf(a[i])){
b.push(a[i]);
}
}
console.log(b);
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