从字符串中获取散列，如hashids

Question

使用hashids包，我可以从数字中获得散列(使用编码和解码)。

    var Hashids = require("hashids"),
        hashids = new Hashids("this is my salt", 8);
    
    var id = hashids.encode(1);

有没有类似的包可以从字符串中获取哈希值？(带编码和解码)

Answer 1

var Hashids = require("hashids");
var hashids = new Hashids("this is my salt");

var hex = Buffer.from('Hello World', 'utf8').toString('hex');
console.log (hex); // '48656c6c6f20576f726c64'

var encoded = hashids.encodeHex(hex);
console.log (encoded); // 'rZ4pPgYxegCarB3eXbg'

var decodedHex = hashids.decodeHex('rZ4pPgYxegCarB3eXbg');
console.log (decodedHex); // '48656c6c6f20576f726c64'

var string = Buffer.from('48656c6c6f20576f726c64', 'hex').toString('utf8');
console.log (string); // 'Hello World'

Answer 2

在不使用Node的Buffer.from的情况下获取十六进制(用于hashids.decodeHex)

const toHex = (str: string): string => str.split("")
        .reduce((hex, c) => hex += c.charCodeAt(0).toString(16).padStart(2, "0"), "")
const toUTF8 = (num: string): string =>
        num.match(/.{1,2}/g)
            .reduce((acc, char) => acc + String.fromCharCode(parseInt(char, 16)),"");