It s a simplistic answer but a sufficient one to tell a.
Ruby nil check operator.
Everything else is truthy.
For each operator plus.
There is a corresponding form of abbreviated assignment operator.
Using the safe navigation operator we can rewrite the previous example using the safe navigation operator.
Method in the object referred to by variable a is called with b as its argument.
Executes code if the conditional is true.
The values false and nil are false and everything else are true.
Comparison operators take simple values numbers or strings as arguments and used to check for equality between two values.
Such a method could help with readability.
So in that context.
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.
And even those speaking ruby quite fluently don t usually know the tiny little details.
This is probably the most basic and ubiquitous form of memoization in ruby.
B is interpreted as a plus b where the plus.
Array 1 dog nil array.
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You also learned that nil false are the only two things in ruby that are falsy.
You learned that nil is just a ruby object that represents nothing.
Most operators are actually method calls.
So if you want a ruby operator because false and nil are confusing that s a totally different story than kotlin s.
Notice ruby uses elsif not else if nor elif.
I m not against the feature itself.
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.
To use unless and neither the invert operator which is usually much easier and more straightforward.
Assign something to a new something object if it isn t already initialized and return it otherwise return the preexisting value of something.
September 11 2010 4 minute read tags.
Array 1 dog nil array.
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.
For many beginning rubyists especially those having experience in other programming languages such as java or c checking whether variable is nil may seem a little bit confusing.
For example a plus.
