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Programming-Idioms

History of Idiom 7 > diff from v107 to v108

Edit summary for version 108 by Kacper:
[Rust] changed for lopp into for_each iterator for readability
↷

Version 107

2021-03-29, 02:55:32

Version 108

2021-06-09, 08:53:43

Idiom #7 Iterate over list indexes and values

Print each index i with its value x from an array-like collection items

Idiom #7 Iterate over list indexes and values

Print each index i with its value x from an array-like collection items

Variables
i,x,items
Variables
i,x,items
Extra Keywords
indices traverse traversal
Extra Keywords
indices traverse traversal
Code 
for (i, x) in items.iter().enumerate() {
    println!("Item {} = {}", i, x);
}
Code 
items.iter().enumerate().for_each(|(i, x)| {
    println!("Item {} = {}", i, x);
})
Doc URL
https://doc.rust-lang.org/std/iter/trait.Iterator.html#method.enumerate
Doc URL
https://doc.rust-lang.org/std/iter/trait.Iterator.html#method.enumerate
Demo URL
https://play.rust-lang.org/?version=stable&mode=debug&edition=2018&gist=88969b976961b1302d199e00ca741db9
Demo URL
https://play.rust-lang.org/?version=nightly&mode=debug&edition=2021&gist=b06e747fd4f280b7692fb02dd041f31e