chopcal/shim/browser/round.js

Chop numbers.

/**
 * Chop to round.
 * @function round
 * @param {number} value - Value to calc.
 * @param {number} [base=1] - Base number.
 * @returns {number} - Round number.
 */
'use strict';

var surplus = require('./surplus');
/** @lends round */


function round(value, base) {
  base = base || 0;
  var surplused = surplus(value, base);
  var result = value - surplused;
  var enough = base / 2 < surplused;

  if (enough) {
    result += base;
  }

  var weight = 1 / base;
  return parseInt(result * weight) / weight;
}

module.exports = round;
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