Bling Hashes

String hash algorithms for node.js.

Installation

$ npm install --save bling-hashes

Introduce

There are 8 algorithms so far.

• BKDRHash
• APHash
• DJBHash
• JSHash
• RSHash
• SDBMHash
• PJWHash
• ELFHash
• CityHash
  • CityHash32: returns a 32-bit hash.
  • CityHash64: and similar return a 64-bit hash.
  • CityHash128: and similar return a 128-bit hash.

The benchmark, performance and implementation can be referenced here (各种字符串Hash函数比较).

Usage

First you should require this package.

var bling = require("bling-hashes");

And then you can pass any string to functions (the same name as algorithms, in lowercase).

Eg.

var hash1 = bling.bkdr("Hello world!"); ///< 501511565
var hash2 = bling.city32("玉扣"); ///< 887335438

Return Values

• From BKDR to ELF, the functions return a Number value;
• city32 returns a Number value too;
• city64 returns a Long value which may refer here;
• city128 returns a City128Value value which has properties below:
  • .toString(): The string value of the 128-bit number;
  • .toLongArray(): An array that includes two 64-bit Long value;
  • .toBuffers(): An array that includes two Buffers.
  • .toBigNumber(): A BigNumber value which may refer here;

Contribution

Thanks to BYVoid. The C++ implementation code was copied from his blog.

You're welcome to make pull requests.

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