Array.prototype.in_array = function (element) {
for (var i = 0; i < this.length; i++) {
if (this[i] == element) {
return true;
}
}
return false;
}
var arr = [1,2,3,4,5]
arr.in_array(5) //true
判断某值是否在该数组中
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转载自blog.csdn.net/supertree_l/article/details/83537618
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