githubmirror/lodash

toSafeInteger.js

37 строк886 B

John-David Dalton

Bump to v4.17.3.

22 дек 2016, 00:46

22 дек 2016, 00:46c7a7540

define(['./_baseClamp', './toInteger'], function(baseClamp, toInteger) {

  /** Used as references for various `Number` constants. */
  var MAX_SAFE_INTEGER = 9007199254740991;

  /**
   * Converts `value` to a safe integer. A safe integer can be compared and
   * represented correctly.
   *
   * @static
   * @memberOf _
   * @since 4.0.0
   * @category Lang
   * @param {*} value The value to convert.
   * @returns {number} Returns the converted integer.
   * @example
   *
   * _.toSafeInteger(3.2);
   * // => 3
   *
   * _.toSafeInteger(Number.MIN_VALUE);
   * // => 0
   *
   * _.toSafeInteger(Infinity);
   * // => 9007199254740991
   *
   * _.toSafeInteger('3.2');
   * // => 3
   */
  function toSafeInteger(value) {
    return value
      ? baseClamp(toInteger(value), -MAX_SAFE_INTEGER, MAX_SAFE_INTEGER)
      : (value === 0 ? value : 0);
  }

  return toSafeInteger;
});