Bump to v3.0.0.

internal/baseCallback.js

@@ -0,0 +1,30 @@
+define(['./baseMatches', './baseProperty', './baseToString', './bindCallback', '../utility/identity', './isBindable'], function(baseMatches, baseProperty, baseToString, bindCallback, identity, isBindable) {
+
+  /**
+   * The base implementation of `_.callback` which supports specifying the
+   * number of arguments to provide to `func`.
+   *
+   * @private
+   * @param {*} [func=_.identity] The value to convert to a callback.
+   * @param {*} [thisArg] The `this` binding of `func`.
+   * @param {number} [argCount] The number of arguments to provide to `func`.
+   * @returns {Function} Returns the callback.
+   */
+  function baseCallback(func, thisArg, argCount) {
+    var type = typeof func;
+    if (type == 'function') {
+      return (typeof thisArg != 'undefined' && isBindable(func))
+        ? bindCallback(func, thisArg, argCount)
+        : func;
+    }
+    if (func == null) {
+      return identity;
+    }
+    // Handle "_.property" and "_.matches" style callback shorthands.
+    return type == 'object'
+      ? baseMatches(func, !argCount)
+      : baseProperty(argCount ? baseToString(func) : func);
+  }
+
+  return baseCallback;
+});