Shulou(Shulou.com)05/31 Report--

This article mainly explains "es6 how to determine whether the array is duplicated", the content of the explanation is simple and clear, easy to learn and understand, now please follow the editor's train of thought slowly in depth, together to study and learn "es6 how to determine whether the array is repeated" bar!

Judgment method: 1, use the length attribute to obtain the length of the original array; 2, use "[... new Set (arr)]" to remove the repeated elements in the array and return a new array; 3, use the length attribute to obtain the length of the array after deduplication; 4, use the "= =" to compare whether the length of the array obtained twice is equal, if equal, the array is not repeated.

The operating environment of this tutorial: windows7 system, ECMAScript version 6, Dell G3 computer.

Es6's method of judging whether an array is duplicated or not

Realize the idea:

Using length attribute to get the length of the original array

Use [... new Set (arr)] to remove repeating elements from the array.

Using the length attribute to get the length of the array after being deduplicated

Using the = = operator to compare, whether the length of the array obtained twice is equal, and if so, the array is not repeated.

Implementation code:

Var arr = [1Jing 2 Jing 3 Jing 3 Jing 4 Jue 5]; len1=arr.length;newArr= [... new Set (arr)]; len2=newArr.length;if (len1==len2) {console.log ("array does not repeat");} else {}

As you can see, the array in the above example is duplicated.

Var arr = [1Jing 2Jing 3Jing 4Jing 5]; len1=arr.length;newArr= [. New Set (arr)]; len2=newArr.length;if (len1==len2) {console.log ("array does not repeat");} else {}

As you can see, the array in the above example is not duplicated.

Thank you for your reading, the above is the content of "how es6 determines whether the array is duplicated". After the study of this article, I believe you have a deeper understanding of how to judge whether the array is repeated by es6, and the specific use needs to be verified in practice. Here is, the editor will push for you more related knowledge points of the article, welcome to follow!

Welcome to subscribe "Shulou Technology Information " to get latest news, interesting things and hot topics in the IT industry, and controls the hottest and latest Internet news, technology news and IT industry trends.