How to use the js some method

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Concept

1. For each element in the array, but this method is that as long as the comparison result of one element is true, the return result is true, on the contrary, the comparison result of all elements is false.

2. Some executes the callback function for each element in the array until you find a value that makes callback return a "true value" (that is, a value that can be converted to a Boolean true).

Grammar

Arr.some (fn [, thisArg])

Attention to use

Some () does not detect empty arrays.

Some () does not change the original array.

Example

Var arr = [1Jing 2Jing 3Jing 4Jing 5] var result = arr.some (function (item,index) {return item > 3}) the above is all the content of this article "how to use the js some method". Thank you for reading! I believe you will gain a lot after reading this article. The editor will update different knowledge for you every day. If you want to learn more knowledge, please pay attention to the industry information channel.