just a basic morse codec

morse_test.js

var Morse={
  toM:{ A:"._",B:"_...",C:"_._.",D:"_..",E:".",F:".._.",G:"__.",H:"....",I:"..",J:".___",K:"_._",L:"._..",M:"__",N:"_.",O:"___",P:".__.",Q:"__._",R:"._.",S:"...",T:"_",U:".._",V:"..._",W:".__",X:"_.._",Y:"_.__",Z:"__..","1":".____","2":"..___","3":"...__","4":"...._","5":".....","6":"_....","7":"__...","8":"___..","9":"____.","0":"_____","/":"_.._.","+":"._._.","=":"_..._",".":"._._._",",":"__..__","?":"..__..","(":"_.__.",")":"_.__._","_":"_...._","\"":"._.._.","_":"..__._","'":".____.",":":"___...",";":"_._._.","$":"..._.._"," ":" "},
  fromM:null,
  getfromM:function(){
    function inverseKeyValueObj(o){var r={},k;for(k in o)r[o[k]]=k;return r}
    if(!this.fromM){
      this.fromM=inverseKeyValueObj(this.toM);
      this.fromM.space=' ';
    }
    return this.fromM;
  },
  toMorseString:function(s){
    var m=this.toM;
    return s.toUpperCase().split('').map(function(c){return m[c]}).join(' ');
  },
  morseToString:function(s){
    var arr=s.replace(/  /g,' space ').split(' ');
    var fm=this.getfromM();
    return arr.map(function(c){return fm[c]}).join('');
  }
}