Code First

Exception handling need to be in control of developer in the code. For that the developer should have clarity in which layer the exception need to be handled.

Handling means:

1. logging the error/exception
2. exit the whole program
3. return from the method
4. let exception to continue to bubble up
5. throw some other exception

Without try/catch, it is difficult to debug the program while developing when asynchronous code used.

To write a JavaScript function to return the given object with given keys

• pick({a: 1}, ['a']) gives {a: 1}.
• pick({a: 1, b: 2}, ['b']) gives {b: 2}.
• pick({a: 1, b: 2}, ['b', 'a']) gives {a: 1, b: 2}.

My solution

function pick(obj, keys) {
  const result = {};
  for (const key in obj) {
    for (const ik of keys) {
      if (key === ik) {
        result[key] = obj[key];
      }
    }
  }
  return result;
}

better solution

function pick(obj, keys) {
  const result = {};
  for (const key of keys) {
    result[key] = obj[key];
  }
  return result;
}

What will be the computing model if the computing machine is a biological stuff like neurons

Let us assume betting game in which the outcome or result will be purely random.

In our hypothetical game, we have a black pot. There are three balls in the black pot. Red, Green, Blue.

Three players can play the game. Each player can bet on a ball or a combination of two balls.

So there are following possibilities to bet

1. Red
2. Green
3. Blue
4. Red & Green
5. Red & Blue
6. Green & Blue

Let X be the amount a player bet on Red.
You are the host who is conducting this game.
How will you determine an amount win by the player bet on red ball ?
And how will you determine the winning amount for six bets (Green, Red & Green,  etc..,)

There are only two hard things in Computer Science: cache invalidation and naming things. – Phil Karlton

When discussing Property mechanism(a language feature of c#.net), I have encountered a basic question. I was saying ‘. .. the code will be used(or reused)  .. ‘. To confirm his interpretation my friend rephrase it as ‘so it is shared’.

I am bit stuck by encountering his words. I said in programming context we call it as “Code Reuse” and sharing has a different meaning in the context. Actually at first I couldn’t articulate it. He argued why can’t we use the word “sharing” until I explained.

Actually it is fundamental that there are terms which have some special meaning in some contexts.This reflects the fact that the Indian society lacks the culture of critical thinking and other knowledge movements.

This discussion triggers me to think about naming the functions, concepts, data in source code. Giving a meaningful name is really a challenge as stated in this blog. I borrowed title for this blog post from Hanselman.