Javscript removes the specified element from the array and returns a new array

To delete a value from an array and return a new array, you need to traverse the old array to find the element to delete

 
 
Array.prototype.remove=function(value){ 
var len = this.length; 
for(var i=0,n=0;i<len;i++){//Assign the element to be deleted to the new array
if(this[i]!=value){ 
this[n++]=this[i]; 
}else{ 
console.log(i);//For testing
} 
} 
this.length = n; 
}; 

var arr = ['1','2','3','5','2','1','4','2','2']; 
arr.remove(2); 
console.log(arr); 

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