Decode letters to phone number.

encontel.js

#!/usr/bin/env node
var phoneDecode = function ( input ) {
    var output = '';
    
    var letters = {
        ABC: 2,
        DEF: 3,
        GHI: 4,
        JKL: 5,
        MNO: 6,
        PQRS: 7,
        TUV: 8,
        WXYZ: 9,
    };
    
    if ( input ) {
        input = input.split('');
        
        for ( var i = 0, len = input.length; i < len; i++ ) {
            for ( var l in letters ) {
                if ( l.indexOf( input[ i ] ) > -1 ) {
                    input[ i ] = letters[ l ];
                }
            }
        }

        output = input.join('');
    }

    return output;
};

console.assert( phoneDecode( '1-HOME-SWEET-HOME' ) === '1-4663-79338-4663', 'Output one not equal.' )
console.assert( phoneDecode( 'MY-MISERABLE-JOB' ) === '69-647372253-562', 'Output two not equal.' )

var main = (function ( args ) {
    if ( args.length > 0 ) {
        for ( var index in args ) {
            if ( index > 1 ) {
               console.log( phoneDecode( args[ index ] ) ); 
            }
        } 
    }
} ( process.argv ));