/// <reference path="index.d.ts"/>

/**
 * @obj
 * @desc 操作字符串的相关方法。所有函数不会改变实参的值，会返回操作后的结果。
 * @method replace - 传入匹配规则参数，返回一个符合改匹配规则的函数
 * @method split - 返回分割该字符的函数
 * @method match - 返回匹配该正则的函数
 */
let _this: StringModule = null;
export const string: StringModule = _this = {
  replace: function (match: RegExp | string): (str: string, substitute: any) => string {
    return (str: string, substitute: any) => str.replace(match, substitute);
  },
  split: function (char: string | RegExp): (str: string) => string[] {
    return (str: string): string[] => str.split(char);
  },
  match: function (regexp: RegExp): (str: string) => string[] {
    return (str: string): string[] => str.match(regexp);
  }
};

export default string;
export const replace = string.replace;
export const split = string.split;
export const match = string.match;