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var baseRest = require('./_baseRest'), | |
toInteger = require('./toInteger'); | |
/** Error message constants. */ | |
var FUNC_ERROR_TEXT = 'Expected a function'; | |
/** | |
* Creates a function that invokes `func` with the `this` binding of the | |
* created function and arguments from `start` and beyond provided as | |
* an array. | |
* | |
* **Note:** This method is based on the | |
* [rest parameter](https://mdn.io/rest_parameters). | |
* | |
* @static | |
* @memberOf _ | |
* @since 4.0.0 | |
* @category Function | |
* @param {Function} func The function to apply a rest parameter to. | |
* @param {number} [start=func.length-1] The start position of the rest parameter. | |
* @returns {Function} Returns the new function. | |
* @example | |
* | |
* var say = _.rest(function(what, names) { | |
* return what + ' ' + _.initial(names).join(', ') + | |
* (_.size(names) > 1 ? ', & ' : '') + _.last(names); | |
* }); | |
* | |
* say('hello', 'fred', 'barney', 'pebbles'); | |
* // => 'hello fred, barney, & pebbles' | |
*/ | |
function rest(func, start) { | |
if (typeof func != 'function') { | |
throw new TypeError(FUNC_ERROR_TEXT); | |
} | |
start = start === undefined ? start : toInteger(start); | |
return baseRest(func, start); | |
} | |
module.exports = rest; | |