December 2023
Intermediate to advanced
400 pages
11h 31m
English
Content preview from Programming with Rust
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16
Closures
A closure is an anonymous function that can “close over” variables from an outer function. This is the origin of the term closure. The closed-over variables are called free variables because they are free from the scope of the closure. Like any function, closures execute code, have parameters, and return values.
Closures are a popular feature in many languages, such as Java and C++. In other languages, such as Java, closures are called lambdas.
You may have to choose between using a closure or a standard function. Here are the advantages to closures.
Closures are convenient when there is a single reference to the function.
Closures are ideal as first-class citizens. You can treat closures as function parameters, return values, or ...
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I'm always learning. So when I got on to O'Reilly, I was like a kid in a candy store. There are playlists. There are answers. There's on-demand training. It's worth its weight in gold, in terms of what it allows me to do.