Humanize an underscored or camel cased string in JavaScript

gistfile1.js

/**
 * Humanize a string. Turns underscored or camel cased string into human readable strings
 *
 * @example
 *  TextUtils.humanize( 'keyword_category' );  // => "Keyword Category"
 *  TextUtils.humanize( 'keywordCategory' );   // => "Keyword Category"
 *
 * @return {String}
 */
humanize: function(str) {
    return str
        .replace(/[A-Z]/g, function(match) { return '_' + match.charAt(0) + match.slice(1); })
        .replace(/_/g, ' ')
        .replace(/(\w+)/g, function(match) { return match.charAt(0).toUpperCase() + match.slice(1); });
}