getSplitter

getSplitter.js

var testone = require('@fedeghe/testone'),
  benchs = [
    {
      in: ['"', ',', `a,,"a;.b,c",1.4.3.2,3,r,"c.,d r;t",s`],
      out: [
        'a', '', '"a;.b,c"', '1.4.3.2', '3', 'r', '"c.,d r;t"', 's'
      ]
    },{
      in: ["'", ';', `a;;'a,b;c';r;'c.,d r;t';s`],
      out: [ 'a', '', "'a,b;c'", 'r', "'c.,d r;t'", 's' ]
    }
  ],
  getSplitter = (delimiter, separator) => 
    str => str.split(separator).reduce(
      (acc, s) => {
        var has = s.includes(delimiter);
        if (acc.flag) {
          acc.r[acc.i] += `${separator}${s}`;
          if (has) {
            acc.i++;
            acc.flag = false;
          }
        } else {
          acc.r[acc.i] = s;
          acc.flag = has;
          if (!has) acc.i++;
        }
        return acc;
      }, {r: [], flag:false, i: 0}
    ).r,
  f = (del, sep, str) => {
    var splitter = getSplitter(del, sep)
    return splitter(str)
  };

testone(benchs, f)