How to generate hash number of a string in Go?

Question

For example:

hash("HelloWorld") = 1234567 

Is there any built-in function could do this ?

Thanks.

Answer 1

The hash package is helpful for this. Note it's an abstraction over specific hash implementations. Some ready made are found in the package subdirectories.

Example:

package main  import (         "fmt"         "hash/fnv" )  func hash(s string) uint32 {         h := fnv.New32a()         h.Write([]byte(s))         return h.Sum32() }  func main() {         fmt.Println(hash("HelloWorld"))         fmt.Println(hash("HelloWorld.")) } 

(Also here)

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Output:

926844193 107706013 

Answer 2

Here is a function you could use to generate a hash number:

// FNV32a hashes using fnv32a algorithm func FNV32a(text string) uint32 {     algorithm := fnv.New32a()     algorithm.Write([]byte(text))     return algorithm.Sum32() } 

I put together a group of those utility hash functions here: https://github.com/shomali11/util

You will find FNV32, FNV32a, FNV64, FNV64a, MD5, SHA1, SHA256 and SHA512