JS wordwrap

wordwrap.js

// Vincent Mac
// coded up answer to what John had asked me.

// Wrapped in anonymous function to prevent polution of global namespace.
(function() {
  "use strict";

  var maxWidth = 50;  // desired column width in number of characters
  var paragraph = "Lorem ipsum dolor sit amet, consectetur adipisicing elit, sed do eiusmod tempor incididunt ut labore et dolore magna aliqua. Ut enim ad minim veniam, quis nostrud exercitation ullamco laboris nisi ut aliquip ex ea commodo consequat. Duis aute irure dolor in reprehenderit in voluptate velit esse cillum dolore eu fugiat nulla pariatur. Excepteur sint occaecat cupidatat non proident, sunt in culpa qui officia deserunt mollit anim id est laborum.";
  // var paragraph = "one two three four five six seven eight nine ten";



  /**
   * function to typeset a `paragraph` to a given column `maxWidth`
   *
   * @param {String} paragraph
   * @param {Number} maxWidth
   *
   * @return {Boolean}
   */

  function wrapParagraph(paragraph, maxWidth) {
    var strBuffer = '';
    var words = [];
    words = paragraph.split(' ');  // split paragraph into an ordered array

    function isStringTooLong(strBuffer) {
      // Alternate methods could include actually calculating the pixel width for
      // use with non-monospaced fonts.  This would require a parameter for font size.
      if (strBuffer.length > maxWidth) {
        return true;
      }
      return false;
    }

    for (var i = 0; i < words.length; i++) {
      var word = words[i];
      if (isStringTooLong(strBuffer + word)) {
        // write output to screen and then reset strBuffer with new word
        console.log(strBuffer);
        strBuffer = word + ' ';
      } else {
        strBuffer += word + ' ';  // add word to string buffer
      }
    }
    console.log(strBuffer);  // display trailing content
  }

  wrapParagraph(paragraph, maxWidth);
  return null;
})();