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This article is about what dictionaries are in javascript. The editor thinks it is very practical, so share it with you as a reference and follow the editor to have a look.

1. Like a collection, a dictionary is a data structure that stores unique values, but it is stored in the form of key-value pairs.

2. There is a dictionary called Map in ES6.

3. Common operations of dictionaries: adding, deleting and deleting key-value pairs.

Example

Const m = new Map (); / / add m.set ('asides,' aa'); m.set ('breadth,''bb); / / delete m.delete ('b'); / / delete all m.clear (); / / change m.set ('asides,' aaa'); / / check m.get ('a'); Thank you for reading! This is the end of the article on "what is a dictionary in javascript". I hope the above content can be of some help to you, so that you can learn more knowledge. if you think the article is good, you can share it for more people to see!

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