This is probably the most basic and ubiquitous form of memoization in ruby.
Ruby nil check operator.
Executes code if the conditional is true.
In this case i was told that with the combination of the operator and ruby s implicit return this means.
Notice ruby uses elsif not else if nor elif.
For example a plus.
Method in the object referred to by variable a is called with b as its argument.
You learned that nil is just a ruby object that represents nothing.
And even those speaking ruby quite fluently don t usually know the tiny little details.
It accomplishes the same thing it either returns the address or nil if some value along the chain is nil the first example may also return false if for example the owner is set to false.
The values false and nil are false and everything else are true.
There is a corresponding form of abbreviated assignment operator.
You also learned that nil false are the only two things in ruby that are falsy.
Assign something to a new something object if it isn t already initialized and return it otherwise return the preexisting value of something.
Most operators are actually method calls.
If you enjoyed this post don t forget to share it on your favorite social networks.
September 11 2010 4 minute read tags.
Such a method could help with readability.
To use unless and neither the invert operator which is usually much easier and more straightforward.
I m not against the feature itself.
Array 1 dog nil array.
Notice ruby uses elsif not else if nor elif.
Comparison operators take simple values numbers or strings as arguments and used to check for equality between two values.
Array 1 dog nil array.
For each operator plus.
So if you want a ruby operator because false and nil are confusing that s a totally different story than kotlin s.
It s a simplistic answer but a sufficient one to tell a.
There does not seem to be a method in ruby to check if an object is not nil.
Everything else is truthy.
So in that context.
It would be nice if ruby had an operator that only considered nil as false like the null coalescing operators or logical defined or operator perl.
Using the safe navigation operator we can rewrite the previous example using the safe navigation operator.
Ruby supports a rich set of operators as you d expect from a modern language.
