New battle programming template in JavaScript

new_bp_template.js

var puts = console.log,
    p = require("util").print,
    cin = parseInput();

// ここに処理を記述

function parseInput(useSplitSpace) {
    var index = 0,
        ret = [],
        input = require("fs").readFileSync("/dev/stdin", "utf8"),
        inputs = input.replace(/\r/g, '').split("\n");

    useSplitSpace = useSplitSpace || false;

    // 入力を改行/空白で区切り平坦な配列に変換
    inputs.forEach(function(val) {
        if ( useSplitSpace && val !== "" ) {
            ret.push(val);
        } else {
            val.split(" ").forEach(function(el) {
                if ( el !== "" ) ret.push(el);
            });
        }
    });

    return {
        hasNext: function(val) {
            if ( typeof val === "undefined" ) {
                return typeof ret[index] !== "undefined";
            } else {
                return ret[index] === val;
            }
        },
        next: function() {
            if ( typeof ret[index+1] === "undefined" ) throw new RangeError("Index out of bounds at '" + index+1 + "'");
            return ret[index++];
        },
        nextInt: function() {
            return parseInt(this.nextNumber());
        },
        nextNumber: function () {
            if ( !/^\d$/.test(this.top()) ) throw new TypeError("'" + this.top() + "' cannot convet to Number");
            return +this.next();
        },
        top: function() {
            return ret[index];
        },
        rewind: function() {
            index = 0;
        }
    };
}