Ruby on Rails

As you read through Ruby code, you may see this construction:

@foo ||= some_expensive_operation(parameters)

That's known as memoizing (take a memo) or memorizing (or memorising if you're in England).

What it does is take the existing value if the expensive operation has already run once, or return and store for later the result of the expensive operation. It's a one-liner in-memory cache.

Walter

> On Sep 1, 2015, at 10:41 AM, Elizabeth McGurty <emcgurty2@gmail.com> wrote:
>
> And I am also super confused as to the notion of 'memorising'. What does that mean? Kids memorise the alphabet and times tables, what does that metaphor mean in terms of Ruby and Ruby on Rails? Memorising is a process of repeatedly iterating through a series that must eventually be held in one's memory. Does Rails have some neural process of educating itself in neural memorising?
> Liz

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