Iteration patterns for Result & Option
Towards the end of my previous post about for loops in Rust, I mentioned how those loops can often be expressed in a more declarative way. This alternative approach involves chaining methods of the Iterator trait to create specialized transformation pipelines: let odds_squared: Vec<_> = (1..100) .filter(|x| x % 2 != 0) .map(|x| x * x) .collect(); Playground link Code like this isn’t unique to Rust
Optional arguments in Rust 1.12
Today’s announcement of Rust 1.12 contains, among other things, this innocous little tidbit: Option implements From for its contained type If you’re not very familiar with it, From is a basic converstion trait which any Rust type can implement. By doing so, it defines how to create its values from some other type — hence its name. Perhaps the most widespread application of this trait (and its from
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