Generate a hash of a string

JavaScript version

const hash = (str) => str.split('').reduce((prev, curr) => (Math.imul(31, prev) + curr.charCodeAt(0)) | 0, 0);

// Or
const hash = (str) => str.split('').reduce((prev, curr) => ((prev << 5) - prev + curr.charCodeAt(0)) | 0, 0);

TypeScript version

const hash = (str: string): number => str.split('').reduce((prev, curr) => (Math.imul(31, prev) + curr.charCodeAt(0)) | 0, 0);

// Or
const hash = (str: string): number => str.split('').reduce((prev, curr) => ((prev << 5) - prev + curr.charCodeAt(0)) | 0, 0);

Examples

hash('hello'); // 99162322