<script>
var arr = [0,1001, 2,6,9]
Array.prototype.$filter = function (callback) {
let arr = this
let ans = new Array()
for (let i = 0; i < arr.length; i++) {
if(callback(arr[i])) {
ans.push(arr[i])
}
}
return ans
}
var result = arr.$filter((item) => {
return item >= 1
})
console.log(result);
</script>
js simple filter
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Origin blog.csdn.net/weixin_48329823/article/details/123230603
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