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qwen/nodejs/node_modules/lodash/partial.js

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+var baseRest = require('./_baseRest'),
+    createWrap = require('./_createWrap'),
+    getHolder = require('./_getHolder'),
+    replaceHolders = require('./_replaceHolders');
+
+/** Used to compose bitmasks for function metadata. */
+var WRAP_PARTIAL_FLAG = 32;
+
+/**
+ * Creates a function that invokes `func` with `partials` prepended to the
+ * arguments it receives. This method is like `_.bind` except it does **not**
+ * alter the `this` binding.
+ *
+ * The `_.partial.placeholder` value, which defaults to `_` in monolithic
+ * builds, may be used as a placeholder for partially applied arguments.
+ *
+ * **Note:** This method doesn't set the "length" property of partially
+ * applied functions.
+ *
+ * @static
+ * @memberOf _
+ * @since 0.2.0
+ * @category Function
+ * @param {Function} func The function to partially apply arguments to.
+ * @param {...*} [partials] The arguments to be partially applied.
+ * @returns {Function} Returns the new partially applied function.
+ * @example
+ *
+ * function greet(greeting, name) {
+ *   return greeting + ' ' + name;
+ * }
+ *
+ * var sayHelloTo = _.partial(greet, 'hello');
+ * sayHelloTo('fred');
+ * // => 'hello fred'
+ *
+ * // Partially applied with placeholders.
+ * var greetFred = _.partial(greet, _, 'fred');
+ * greetFred('hi');
+ * // => 'hi fred'
+ */
+var partial = baseRest(function(func, partials) {
+  var holders = replaceHolders(partials, getHolder(partial));
+  return createWrap(func, WRAP_PARTIAL_FLAG, undefined, partials, holders);
+});
+
+// Assign default placeholders.
+partial.placeholder = {};
+
+module.exports = partial;