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Editor to share with you what are the ways to deal with the Array constructor in js, I believe most people do not know much about it, so share this article for your reference, I hope you can learn a lot after reading this article, let's go to know it!

1. NewArray (arg1,arg2, …) When the parameter length is 0 or greater than or equal to 2, the passed parameters will in turn become items 0 to N of the new array.

When the parameter length is 0, an empty array is returned.

2. NewArray (len), which returns an array containing only len elements when len is not a numeric value.

When len is a numeric value, the maximum len cannot exceed 32-bit unsigned shaping, that is, it needs to be less than 2 to the power of 32 (len maximum is Math.pow (2 Magin32)), otherwise Rangeerror will be thrown.

Example

/ / using the Array constructor, you can customize the length var a = Array (6) / / [empty × 6] / / use the object literals var b = [] b.length = 6 / / [undefined × 6] all the contents of the article "what are the ways to deal with the Array constructor in js". Thank you for reading! I believe we all have a certain understanding, hope to share the content to help you, if you want to learn more knowledge, welcome to follow the industry information channel!

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