一个匹配字字符串是aabbcc或者其他模式的运用

<!--一个匹配字字符串是aabbcc或aaaabccc或者其他模式的运用-->

function isPattern(str, pattern) {
        let str_a = str.split(" ");
        let p_a = pattern.split("");

        let noCpy = function (arr) {
          let temp = [];
          arr.forEach(element => {
            if (!temp.length || temp.indexOf(element) < 0) {
              temp.push(element)
            }
          });
          return temp
        };
        let str_a_noCpy = noCpy(str_a);
        let p_a_noCpy = noCpy(p_a);

        str_a_noCpy.forEach((e, index) => {
          str = str.replace(new RegExp(e, "gm"), p_a_noCpy[index])
        })
        str = str.replace(/\s*/gm, "")
        return str == pattern
      }