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Viewing / Editing File: times.js

var baseTimes = require('./_baseTimes'),
    castFunction = require('./_castFunction'),
    toInteger = require('./toInteger');

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

/** Used as references for the maximum length and index of an array. */
var MAX_ARRAY_LENGTH = 4294967295;

/* Built-in method references for those with the same name as other `lodash` methods. */
var nativeMin = Math.min;

/**
 * Invokes the iteratee `n` times, returning an array of the results of
 * each invocation. The iteratee is invoked with one argument; (index).
 *
 * @static
 * @since 0.1.0
 * @memberOf _
 * @category Util
 * @param {number} n The number of times to invoke `iteratee`.
 * @param {Function} [iteratee=_.identity] The function invoked per iteration.
 * @returns {Array} Returns the array of results.
 * @example
 *
 * _.times(3, String);
 * // => ['0', '1', '2']
 *
 *  _.times(4, _.constant(0));
 * // => [0, 0, 0, 0]
 */
function times(n, iteratee) {
  n = toInteger(n);
  if (n < 1 || n > MAX_SAFE_INTEGER) {
    return [];
  }
  var index = MAX_ARRAY_LENGTH,
      length = nativeMin(n, MAX_ARRAY_LENGTH);

iteratee = castFunction(iteratee);
  n -= MAX_ARRAY_LENGTH;

var result = baseTimes(length, iteratee);
  while (++index < n) {
    iteratee(index);
  }
  return result;
}

module.exports = times;

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