tokens.js

var fs = require('fs');

function _print_tokens(obj) {
    switch (typeof obj) {
        case 'string':
            console.log('string: '+JSON.stringify(obj));
            break;

        case 'number':
            console.log('number:',obj);
            break;

        case 'boolean':
            console.log('boolean:',obj);
            break;

        case 'object':
            if (Array.isArray(obj)) {
                console.log('[');
                for (var i = 0; i < obj.length; ++ i) {
                    _print_tokens(obj[i]);
                }
                console.log(']');
            }
            else if (null === obj) {
                console.log('null');
            }
            else {
                console.log('{');
                for (var key in obj) {
                    _print_tokens(key);
                    _print_tokens(obj[key]);
                }
                console.log('}');
            }
            break;

        default:
            throw new Error('unknown type: '+(typeof obj));
    }
}

function print_tokens(obj) {
    _print_tokens(obj);
    console.log('end');
}

function main (argv) {
    for (var i = 1; i < argv.length; ++ i) {
        var filename = argv[i];
        var buf = fs.readFileSync(filename, 'utf8');
        var obj = JSON.parse(buf);

        print_tokens(obj);
    }
}

main(process.argv);