Java 中字符串 hashCode 方法的 JavaScript 实现

hashCode.ts

/**
 * @function hashCode
 * @param {string} string
 * @returns {number}
 */
function hashCode(string: string): number {
  let hash: number = 0;

  const { length }: string = string;

  for (let i: number = 0; i < length; i++) {
    const code: number = string.codePointAt(i) as number;

    hash = (hash << 5) - hash + code;
    hash |= 0; // Convert to 32bit integer
  }

  return hash;
}