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This article mainly introduces JavaScript how to use hasOwnProperty to achieve array de-duplication, the article is very detailed, has a certain reference value, interested friends must read it!

Using hasOwnProperty

Function unique (arr) {var obj = {}; return arr.filter (function (item, index, arr) {return obj.hasOwnProperty (typeof item + item)? False: (obj [typeof item + item] = true)} var arr = [1 true ", true,15, false, undefined, null, NaN," NaN ", 0," a ", {… }] / / everything is heavy.

Using hasOwnProperty to judge whether there are object attributes.

These are all the contents of the article "how JavaScript uses hasOwnProperty to achieve array deduplication". Thank you for reading! Hope to share the content to help you, more related knowledge, welcome to follow the industry information channel!

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