npm install xxhashjsxxHash is a very fast hashing algorithm (see the details here). xxhashjs is a Javascript implementation of it, written in 100% Javascript. Although not as fast as the C version, it does perform pretty well given the current Javascript limitations in handling unsigned 32 bits integers.
In nodejs:
npm install xxhashjs
In the browser, include the following, and access the constructor with _XXH_:
``javascript`
* In one step:
`javascript`
var h = XXH.h32( 'abcd', 0xABCD ).toString(16) // seed = 0xABCD
> 0xCDA8FAE4
* In several steps (useful in conjunction of NodeJS streams):
`javascript`
var H = XXH.h32( 0xABCD ) // seed = 0xABCD
var h = H.update( 'abcd' ).digest().toString(16)
> 0xCDA8FAE4
* More examples in the examples directory:
* Compute xxHash from a file data
* Use xxHashjs in the browser
* XXH makes 2 functions available for 32 bits XXH and 64 bits XXH respectively, with the same signature:
* XXH.h32
* XXH.h64
* In one step:
XXH.h32(,
The data can either be a string, an ArrayBuffer or a NodeJS Buffer object.
The seed can either be a number or a UINT32 object.
* In several steps:
* instantiate a new XXH object H:
XXH.h32( or XXH.h32()
The seed can be set later on with the method
* add data to the hash calculation:
H.update()
* finish the calculations:
H.digest()
The object returned can be converted to a string with toString( or a number toNumber().digest()
Once has been called, the object can be reused. The same seed will be used or it can be changed with init(.
* XXH.h32()
*
Initialize the XXH object with the given seed. The seed can either be a number or a UINT32 object.
*
Add data for hashing. The data can either be a string, an ArrayBuffer or a NodeJS Buffer object.
* digest() (_UINT32_)
Finalize the hash calculations and returns an UINT32 object. The hash value can be retrieved with toString(
* XXH.h64()
*
Initialize the XXH object with the given seed. The seed can either be a number or a UINT64 object.
*
Add data for hashing. The data can either be a string, an ArrayBuffer or a NodeJS Buffer object.
*
Finalize the hash calculations and returns an UINT64 object. The hash value can be retrieved with toString(
MIT