string-etc/lib/chunk.js

Collection of supplementary JavaScript String methods that works across module packaging systems and that can be included piece-wise

/*
 * Copyright (c) 2015 Dickson Tam
 *
 * 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:
 *
 * 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.
 *
 */

 (function() {

   var chunk = function(str, width) {
     var arr = [];

     if (typeof(width) != 'number') return [];
     if (width < 1) return [];

     for (var i=0; i < str.length; i+=width) {
       arr.push(str.substr(i, width));
     }

     return arr;
   }

   if (typeof module !== 'undefined' && module && module.exports) { // Node.js & CommonJS
     module.exports = chunk;
   } else { // Browser
     String.prototype.chunk = function() {
       return chunk(this,width);
     }
   }

 })();