Bump to v4.1.0.

_createRound.js

@@ -0,0 +1,29 @@
+define(['./toInteger', './toNumber', './toString'], function(toInteger, toNumber, toString) {
+
+  /**
+   * Creates a function like `_.round`.
+   *
+   * @private
+   * @param {string} methodName The name of the `Math` method to use when rounding.
+   * @returns {Function} Returns the new round function.
+   */
+  function createRound(methodName) {
+    var func = Math[methodName];
+    return function(number, precision) {
+      number = toNumber(number);
+      precision = toInteger(precision);
+      if (precision) {
+        // Shift with exponential notation to avoid floating-point issues.
+        // See [MDN](https://mdn.io/round#Examples) for more details.
+        var pair = (toString(number) + 'e').split('e'),
+            value = func(pair[0] + 'e' + (+pair[1] + precision));
+
+        pair = (toString(value) + 'e').split('e');
+        return +(pair[0] + 'e' + (+pair[1] - precision));
+      }
+      return func(number);
+    };
+  }
+
+  return createRound;
+});