Learn Data Structures and Algorithms with Golang

Hashing

Hash functions were introduced in Chapter 4, Non-Linear Data Structures. Hash implementation in Go has crc32 and sha256 implementations. An implementation of a hashing algorithm with multiple values using an XOR transformation is shown in the following code snippet. The CreateHash function takes a byte array, byteStr, as a parameter and returns the sha256 checksum of the byte array:

//main package has examples shown// in Go Data Structures and algorithms bookpackage main// importing fmt packageimport (  "fmt"  "crypto/sha1"  "hash")//CreateHash methodfunc CreateHash(byteStr []byte) []byte {  var hashVal hash.Hash  hashVal = sha1.New()  hashVal.Write(byteStr)  var bytes []byte  bytes = hashVal.Sum(nil)  return bytes}

In the following sections, ...