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Programming-Idioms

History of Idiom 137 > diff from v20 to v21

Edit summary for version 21 by davelpz:
New Rust implementation by user [davelpz]
↷

Version 20

2017-12-06, 13:56:45

Version 21

2018-06-06, 02:38:04

Idiom #137 Check if string contains only digits

Set boolean b to true if string s contains only characters in range '0'..'9', false otherwise.

Idiom #137 Check if string contains only digits

Set boolean b to true if string s contains only characters in range '0'..'9', false otherwise.

Code 
let b = s.chars().all(|c| c.is_numeric() );
Doc URL
https://doc.rust-lang.org/std/iter/trait.Iterator.html#method.all