translate.js : XPath の translate() 関数。

translate-by-array.js

/**
 * translate-by-array.js
 * translate function of XPath.
 *
 * @version 1.0.2
 * @author think49
 * @url https://gist.github.com/966219
 * @license http://www.opensource.org/licenses/mit-license.php (The MIT License)
 * @see <a href="http://www.w3.org/TR/xpath/#function-translate">translate() - XML Path Language (XPath)</a>
 */

var translateByArray = (function (Object, String, Object_toString) {

  function translateByArray (string, searchArray, replaceArray) {
    var results, token, searchString, i, j, stringLength, arrayLength, tokenLength;

    if (!isArray(searchArray)) {
      return String(string);
    }

    replaceArray = Object(replaceArray);
    arrayLength = searchArray.length;
    i = replaceArray.length;

    string = String(string);
    results = [];
    i = 0;
    stringLength = string.length;
    arrayLength = searchArray.length;

    while (i < stringLength) {
      token = string.charAt(0);
      tokenLength = 1;

      for (j = 0; j < arrayLength; ++j) {
        searchString = searchArray[j];

        if (string.indexOf(searchString, i) === i) {
          token = replaceArray[j];
          tokenLength = searchString.length;
          break;
        }
      }

      i += tokenLength;
      results.push(token);
    }

    return results.join('');
  }

  var isArray = Array.isArray || function (arg) {
    var type = typeof arg;

    return arg !== null && type !== 'undefined' && type !== 'boolean' && type !== 'number' && type !== 'string' && Object_toString.call(arg) === '[object Array]';
  };

  return translateByArray;
})(Object, String, Object.prototype.toString);

translate.js

/**
 * translate.js
 * translate function of XPath.
 *
 * @version 1.1.4
 * @author think49
 * @url https://gist.github.com/966219
 * @license http://www.opensource.org/licenses/mit-license.php (The MIT License)
 * @see <a href="http://www.w3.org/TR/xpath/#function-translate">translate() - XML Path Language (XPath)</a>
 */

function translate (string, searchString, replaceString) {
  var _String, i, len, index;

  _String = String;
  searchString = _String(searchString);
  replaceString = _String(replaceString).split('');
  len = searchString.length;
  i = replaceString.length;

  string = _String(string).split('');
  i = string.length;

  while (i--) {
    index = searchString.indexOf(string[i]);

    if (index !== -1) {
      string[i] = replaceString[index];
    }
  }

  return string.join('');
}

XPath の translate() 関数について。

• translate() - XML Path Language (XPath)
• translate - MDC Docs
• たのしいXML: XPathとXSLTの関数 translate

速度テスト。

• translate function of XPath · jsPerf

全角/半角の相互変換。

• 半角から全角文字列へ - babu_babu_babooのごみ箱
• to-hankaku.js, to-zenkaku.js : 半角文字/全角文字をそれぞれ変換する — Gist