bluebird/js/zalgo/some.js

Full featured Promises/A+ implementation with exceptionally good performance

/**
 * Copyright (c) 2013 Petka Antonov
 * 
 * Permission is hereby granted, free of charge, to any person obtaining a copy
 * of this software and associated documentation files (the "Software"), to deal
 * in the Software without restriction, including without limitation the rights
 * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
 * copies of the Software, and to permit persons to whom the Software is
 * furnished to do so, subject to the following conditions:</p>
 * 
 * The above copyright notice and this permission notice shall be included in
 * all copies or substantial portions of the Software.
 * 
 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.  IN NO EVENT SHALL THE
 * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
 * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
 * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
 * THE SOFTWARE.
 */
"use strict";
module.exports = function( Promise, Promise$_All ) {
    var errors = require( "./errors.js" );
    var apiRejection = errors.apiRejection;
    var SomePromiseArray = require( "./some_promise_array.js" );
    var ASSERT = require( "./assert.js" );

    function Promise$_Some( promises, howMany, useBound, caller ) {
        if( ( howMany | 0 ) !== howMany ) {
            return apiRejection("howMany must be an integer");
        }
        var ret = Promise$_All(
            promises,
            SomePromiseArray,
            caller,
            useBound === true ? promises._boundTo : void 0
        );
        ret.setHowMany( howMany );
        return ret.promise();
    }

    Promise.some = function Promise$Some( promises, howMany ) {
        return Promise$_Some( promises, howMany, false, Promise.some );
    };

    Promise.prototype.some = function Promise$some( count ) {
        return Promise$_Some( this, count, true, this.some );
    };
};