Bump to v4.0.0.

toSafeInteger.js

@@ -0,0 +1,34 @@
+define(['./internal/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 _
+   * @category Lang
+   * @param {*} value The value to convert.
+   * @returns {number} Returns the converted integer.
+   * @example
+   *
+   * _.toSafeInteger(3);
+   * // => 3
+   *
+   * _.toSafeInteger(Number.MIN_VALUE);
+   * // => 0
+   *
+   * _.toSafeInteger(Infinity);
+   * // => 9007199254740991
+   *
+   * _.toSafeInteger('3');
+   * // => 3
+   */
+  function toSafeInteger(value) {
+    return baseClamp(toInteger(value), -MAX_SAFE_INTEGER, MAX_SAFE_INTEGER);
+  }
+
+  return toSafeInteger;
+});