partialRight.js
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partialRight.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_RIGHT_FLAG = 64;

			/**
			* This method is like `_.partial` except that partially applied arguments
			* are appended to the arguments it receives.
			*
			* The `_.partialRight.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 1.0.0
			* @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 greetFred = _.partialRight(greet, 'fred');
			* greetFred('hi');
			* // => 'hi fred'
			*
			* // Partially applied with placeholders.
			* var sayHelloTo = _.partialRight(greet, 'hello', _);
			* sayHelloTo('fred');
			* // => 'hello fred'
			*/
			var partialRight = baseRest(function(func, partials) {
			var holders = replaceHolders(partials, getHolder(partialRight));
			return createWrap(func, WRAP_PARTIAL_RIGHT_FLAG, undefined, partials, holders);
			});

			// Assign default placeholders.
			partialRight.placeholder = {};

			module.exports = partialRight;