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This article mainly explains "how to understand the js array pattern". The content of the article is simple and clear, and it is easy to learn and understand. Please follow the editor's train of thought to study and learn "how to understand the js array pattern".

1. Match an array. According to the length of array elements, array matching can be divided into strict length matching and shortest length matching.

2. If there is an ellipsis, you can match any more array elements. Array syntax does not support holes (consecutive commas) and trailing commas. Iterators are not supported.

Example

Test ("value array", () = > {let y = match ('[]') let v = y ([]) let w = y ({}) expect (v) .toEqual (true) expect (w) .toEqual (false)}) test ("array elements") () = > {let input ='[1] 'let y = match (input) let v = y ([1]) let w = y ([{x: 0}]) expect (v) .toEqual (true) expect (w) .toEqual (false)}) test ("elements elements value", () = > {let input =' [1,2] 'let y = match (input) let v = y ([1,2]) let w = y ([null]) 1]) expect (v) .toEqual (true) expect (w) .toEqual (false)}) Thank you for your reading The above is the content of "how to understand the js array pattern". After the study of this article, I believe you have a deeper understanding of how to understand the js array pattern, 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!

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