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This article mainly explains "what is hash in javascript". The content in 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 "what is hash in javascript".

In javascript, hash refers to the hash table, which is a data structure that directly accesses the memory storage location according to the keywords; through the hash table, a corresponding relationship is established between the storage location of the data elements and the keywords of the data elements, and the function that establishes this corresponding relationship is called the hash function.

The operating environment of this tutorial: windows7 system, javascript1.8.5 version, Dell G3 computer.

The basic concepts of javascript hash:

Hash table (hash table) is a kind of data structure that accesses the memory storage location directly according to the keywords. Through the hash table, the corresponding relationship between the location of data elements and the keywords of data elements is established. The function that establishes this corresponding relationship is called hash function.

The construction method of hash table:

Assuming that the number of data elements to be stored is n, set a continuous storage unit of length m (m > n) with the keyword Ki (0) of each data element.

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