doukaku12_2.js

"use strict";

function solve(input) {
    var d = [1, 2, 3];
    var result = input.split("").map(function(dir) {
        if(       dir === "N") { d = [ 7-d[1], d[0]  , d[2]   ];
        } else if(dir === "S") { d = [ d[1]  , 7-d[0], d[2]   ];
        } else if(dir === "W") { d = [ 7-d[2], d[1]  , d[0]   ];
        } else if(dir === "E") { d = [ d[2]  , d[1]  , 7-d[0] ];
        }
        return d[0].toString();
    });
    return "1" + result.join("");
}


function test(input, expected) {
    var result = solve(input);
    if(result !== expected) {
        console.log("-------------\ninput = %s\n\nexpected = %s\nresult   = %s", input, expected, result);
    }
}


test( "NNESWWS"     , "15635624" );
test( "EEEE"        , "13641" );
test( "WWWW"        , "14631" );
test( "SSSS"        , "12651" );
test( "NNNN"        , "15621" );
test( "EENN"        , "13651" );
test( "WWNN"        , "14651" );
test( "SSNN"        , "12621" );
test( "NENNN"       , "153641" );
test( "NWNNN"       , "154631" );
test( "SWWWSNEEEN"  , "12453635421" );
test( "SENWSWSNSWE" , "123123656545" );
test( "SSSWNNNE"    , "126546315" );
test( "SWNWSSSWWE"  , "12415423646" );
test( "ENNWWS"      , "1354135" );
test( "ESWNNW"      , "1321365" );
test( "NWSSE"       , "154135" );
test( "SWNWEWSEEN"  , "12415154135" );
test( "EWNWEEEEWN"  , "13154532426" );
test( "WNEWEWWWSNW" , "145151562421" );
test( "NNEE"        , "15631" );
test( "EEEEWNWSW"   , "1364145642" );
test( "SENNWWES"    , "123142321" );
test( "SWWWSNSNESWW", "1245363635631" );
test( "WESSENSE"    , "141263231" );
test( "SWNSSESESSS" , "124146231562" );
test( "ENS"         , "1353" );
test( "WNN"         , "1453" );
test( "SSEENEEEN"   , "1263124536" );
test( "NWSNNNW"     , "15414632" );
test( "ESSSSSWW"    , "132453215" );
test( "ESE"         , "1326" );
test( "SNWNWWNSSSS" , "121456232453" );
test( "SWEESEN"     , "12423653" );
test( "NEEWNSSWWW"  , "15323631562" );
test( "WSEW"        , "14212" );
test( "SWSNNNSNWE"  , "12464131353" );
test( "ENWEWSEEW"   , "1351513545" );
test( "WSEWN"       , "142124" );
test( "EWNEESEWE"   , "1315321414" );
test( "NESEEN"      , "1531263" );
test( "WSW"         , "1426" );
test( "ENEWE"       , "135656" );