core getDelimiter.js

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  module.exports = getDelimiter;
var defaulDelimiters = [",", "|", "\t", ";", ":"];
function getDelimiter(rowStr,param) {
  var checker;
  if (param.delimiter === "auto"){
    checker = defaulDelimiters;
  } else if (param.delimiter instanceof Array) {
    checker = param.delimiter;
  } else {
    return param.delimiter;
  }
  var count = 0;
  var rtn = ",";
  checker.forEach(function(delim) {
    var delimCount = rowStr.split(delim).length;
    if (delimCount > count) {
      rtn = delim;
      count = delimCount;
    }
  });
  return rtn;
}