Determine the value existing in the array

This time I will bring you the judgment of the value that exists in the array, and what are the precautions for judging the value that exists in the array. The following is a practical case, let's take a look.

<title>jquery判断值是否存在于数组中</title>
<meta>


<script></script>
<script>
//参数第一个为数组，第二个为需要判断是否存在于数组中的值
function isInArray(arr,val){
  var str = ","+arr.join(",")+",";
  if(str.indexOf(","+val+",") != "-1"){
    //该数存在于数组中
    arr.splice($.inArray(val,arr),1);  //把该数从数组中删除
    console.log(arr);
  }else{
    //该数不存在于数组中
    console.log("不存在");
  }
}
var arr = [1,28,60,80,6];
isInArray(arr,28);//存在，删除元素28
isInArray(arr,18);//不存在，提示“不存在”
</script>

Run results:

I believe you have mastered the method after reading the case in this article. For more exciting information, please pay attention to other related articles on the php Chinese website!

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