Function getPercentWithPrecision

_benchmarks/sample_echarts.js:6756–6804

* Get a data of given precision, assuring the sum of percentages * in valueList is 1. * The largest remainer method is used. * https://en.wikipedia.org/wiki/Largest_remainder_method * * @param valueList a list of all data * @param idx index of the data to be processed i

(valueList, idx, precision)

     */

    function getPercentWithPrecision(valueList, idx, precision) {
      if (!valueList[idx]) {
        return 0;
      }

      var sum = reduce(valueList, function (acc, val) {
        return acc + (isNaN(val) ? 0 : val);
      }, 0);

      if (sum === 0) {
        return 0;
      }

      var digits = Math.pow(10, precision);
      var votesPerQuota = map(valueList, function (val) {
        return (isNaN(val) ? 0 : val) / sum * digits * 100;
      });
      var targetSeats = digits * 100;
      var seats = map(votesPerQuota, function (votes) {
        // Assign automatic seats.
        return Math.floor(votes);
      });
      var currentSum = reduce(seats, function (acc, val) {
        return acc + val;
      }, 0);
      var remainder = map(votesPerQuota, function (votes, idx) {
        return votes - seats[idx];
      }); // Has remainding votes.

      while (currentSum < targetSeats) {
        // Find next largest remainder.
        var max = Number.NEGATIVE_INFINITY;
        var maxId = null;

        for (var i = 0, len = remainder.length; i < len; ++i) {
          if (remainder[i] > max) {
            max = remainder[i];
            maxId = i;
          }
        } // Add a vote to max remainder.


        ++seats[maxId];
        remainder[maxId] = 0;
        ++currentSum;
      }

      return seats[idx] / digits;
    } // Number.MAX_SAFE_INTEGER, ie do not support.

    var MAX_SAFE_INTEGER = 9007199254740991;
    /**