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def firstchar(str)
  return str.split.map{|w|w[0]}.join
end

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/**
 * Question:
 * Suppose you are given an array stock_prices_yesterday of the prices of a stock
 * over time. Write an efficient algorithm for computing the best profit you can
 * make from first buying 1 share of the stock, and then selling that 1 share
 * later.  Note that you must buy before you sell (no "shorting").
 */

function copy(obj) {
  var ret = {};

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function colemanLiau(L, S) {
  return 0.0588 * L - 0.296 * S - 15.8;
}

////////////////////////////////////////////////////////////////////////////////
// Parser //////////////////////////////////////////////////////////////////////

function TextParser(text) {
  if (!(this instanceof TextParser)) {
    return new TextParser(text);

tcw165

/**
 * Coin Change Problem
 * ===================
 * Find the number of ways of making changes for a particular amount of cents, N,
 * using a given set of denominations S = {S1,S2,S3,...S[m]}.
 *
 * Let's look into a similiar but simplier case:
 *      | 0  1  2  3  4  5  ... N
 *   ---+--------------------------
 *    1 | 1  1  1  1  1  1

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/**
 * This is an experiment for testing the "Concurrency Model and Event Loop" of
 * JavaScript.
 *
 * It's designed that an asynchronous function with a given callback is called;
 * And subsequently a synchronous function which is designated to take far more
 * time than the asynchronous one will take is called.
 *
 * Question: what is the response order of async-fun/sync-fun/callback?
 *

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/**
 * How to declare a real private members in a JavaScript class?
 * 
 * Prerequisities
 * --------------
 * 1. This is a node module, as it's wrapped in a closure (Module Pattern).
 *    e.g. var XXX = (function() { ... })();
 * 2. Need ES6 support.
 * 
 * Solution

tcw165

package com.cardinalblue.android.piccollage.math;

import android.graphics.Point;
import android.graphics.PointF;
import android.graphics.RectF;

import java.util.ArrayList;
import java.util.List;

/**

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// Copyright (c) 2015 boyw165
//
// Permission is hereby granted, free of charge, to any person obtaining a copy
// of this software and associated documentation files (the "Software"), to deal
// in the Software without restriction, including without limitation the rights
// to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
// copies of the Software, and to permit persons to whom the Software is
// furnished to do so, subject to the following conditions:
//
//    The above copyright notice and this permission notice shall be included in

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// Copyright (c) 2016 boyw165
//
// Permission is hereby granted, free of charge, to any person obtaining a copy
// of this software and associated documentation files (the "Software"), to deal
// in the Software without restriction, including without limitation the rights
// to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
// copies of the Software, and to permit persons to whom the Software is
// furnished to do so, subject to the following conditions:
//
//    The above copyright notice and this permission notice shall be included in

tcw165

// Copyright (c) 2016 boyw165
//
// Permission is hereby granted, free of charge, to any person obtaining a copy
// of this software and associated documentation files (the "Software"), to deal
// in the Software without restriction, including without limitation the rights
// to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
// copies of the Software, and to permit persons to whom the Software is
// furnished to do so, subject to the following conditions:
//
//    The above copyright notice and this permission notice shall be included in