This (Stop creating mutable objects.)

Imagine:

  1. If your bank account number changed every time you deposited or withdrew money.
  2. You had to buy a new fridge or freezer (or construct a new larder) every time you brought home new food; or consumed some.
  3. If you had to buy a new car every time you need to top up the tank.

    (How would that work when you are driving and using fuel?)

Too real-world for OO programmers to consider relevant?

Then think on this:

Every time the balance in an account object changes; something has to 'mutate': either the current balance changes; or you create a new account object, duplicating all the attributes as the existing one except the balance. And then discard (garbage collect) the old one.

"Spooky action at a distance" is a great quote from a great man about a truly spooky phenomena; and utterly bogus when applied to changing the bit-pattern held at a location in DRAM.

Read only objects are akin to, and equally nonsensical, as read-only variables: the triumph of theoretical dogma over pragmatic practice.

With the rise and rise of 'Social' network sites: 'Computers are making people easier to use everyday'
Examine what is said, not who speaks -- Silence betokens consent -- Love the truth but pardon error.
"Science is about questioning the status quo. Questioning authority". I knew I was on the right track :)
In the absence of evidence, opinion is indistinguishable from prejudice.

In reply to Re^2: OOP's setter/getter method - is there a way to avoid them? by BrowserUk
in thread OOP's setter/getter method - is there a way to avoid them? by tiny_monk

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