A simple string format function replacing items in a string with their respective strings / numbers in a map.

StringFormat

define([],
  function () {

    var resolvePath = function (path, map) {
      var pathParts, i, ctx;

      ctx = map;
      i = 0;
      pathParts = path.split('.');

      for (; i < pathParts.length; i++) {
        if(!ctx[pathParts[i]]){
          throw new Error('cannot resolve part of path'+ JSON.stringify(ctx) +' > '+ path);
        }

        ctx = ctx[pathParts[i]];
      }

      return ctx;
    }

    var format = function (inStr, replacements) {
      if(!inStr){
        throw new Error('String format > No string format (inStr) provided.');
      }

      if(!replacements){
        throw new Error('String format > No replacements provided.');
      }

      var i, path,
        matches = inStr.match(/{{[0-9|a-z|A-Z|/./-/$]*}}/igm);

      for (i = 0; i < matches.length; i++) {
        path = '';
        path = matches[i].replace('{{', '').replace('}}', '');


        inStr = inStr.replace(matches[i], resolvePath(path, replacements));
      }

      return inStr;

    };

    return format;
  });