js-electrical-engineering-equations/lib/util-functions.js

This is an ES6/ES2015 library of Electrical Engineering Equations. It works with Typescript, es6, and es5.

'use strict';

Object.defineProperty(exports, "__esModule", {
  value: true
});
/**
 *
 * Takes a number and sets it to a given decimal precision.
 *
 * @param {number} num
 * @param {number} precision
 * @return {number}
 */
function getFloat() {
  var num = arguments.length > 0 && arguments[0] !== undefined ? arguments[0] : 0;
  var precision = arguments.length > 1 && arguments[1] !== undefined ? arguments[1] : 2;

  return parseFloat(num.toFixed(precision));
}

/**
 * Takes meters and converts them to centimeters with a given precision.
 * @param {number} meters
 * @param {number} precision
 * @return {number}
 */
function metersToCentimeters(meters) {
  var precision = arguments.length > 1 && arguments[1] !== undefined ? arguments[1] : 4;

  return getFloat(meters * 100, precision);
}

/**
 * Takes meters and converts them to feet with a given precision.
 * @param {number} meters
 * @param {number} precision
 * @return {number}
 */
function metersToFeet(meters) {
  var precision = arguments.length > 1 && arguments[1] !== undefined ? arguments[1] : 4;

  return getFloat(meters * 3.2808399, precision);
}

/**
 * Takes meters and converts them to inches with a given precision.
 * @param {number} meters
 * @param {number} precision
 * @return {number}
 */
function metersToInches(meters) {
  var precision = arguments.length > 1 && arguments[1] !== undefined ? arguments[1] : 4;

  return getFloat(meters * 3.2808399 * 12, precision);
}

/**
 * Takes a unit of length, a length in meters and converts meters to the given unit of length with the specified precision.
 * @param unit
 * @param value
 * @param precision
 * @return {number}
 */
function meterConversion(unit, value, precision) {
  switch (unit) {
    case 'cm':
      return metersToCentimeters(value, precision);
    case 'm':
      return getFloat(value, precision);
    case 'f':
      return metersToFeet(value, precision);
    case 'in':
      return metersToInches(value, precision);
  }
}

exports.getFloat = getFloat;
exports.metersToCentimeters = metersToCentimeters;
exports.metersToFeet = metersToFeet;
exports.metersToInches = metersToInches;
exports.meterConversion = meterConversion;