JavaScript method to merge two arrays and remove duplicates_javascript tips

The example in this article describes how to merge two arrays and remove duplicates using JavaScript. Share it with everyone for your reference. The specific implementation method is as follows:

Array.prototype.unique = function() {
var a = this.concat();
for(var i=0; i
for(var j=i+1; j
if(a[i] === a[j])
a.splice(j, 1);
}
}
return a;
};
//Demo
var array1 = ["a","b"];
var array2 = ["b", "c"];
var array3 = array1.concat(array2).unique();

Output result:
["a","b","c"]

I hope this article will be helpful to everyone’s JavaScript programming design.