Trait StrExt 

pub trait StrExt {
    // Required method
    fn splitn_exact<'a, P: Into<AltPattern<'a>>>(
        &'a self,
        n: usize,
        pat: P,
    ) -> Option<Vec<&'a str>>;
}

Extension trait with useful methods for primitive type str.

Required Methods

fn splitn_exact<'a, P: Into<AltPattern<'a>>>( &'a self, n: usize, pat: P, ) -> Option<Vec<&'a str>>

Version of str::splitn which expects the exact amount of entries obtained after splitting. This method returns Vec, as SplitN iterator depends on the unstable type Pattern and cannot be returned on the stable Rust.

Examples

use stdext::prelude::*;

let data = "Hello world";
let splitted = data.splitn_exact(2, " ").unwrap();
assert_eq!(&splitted, &["Hello", "world"]);

let splitted = data.splitn_exact(5, '-');
assert!(splitted.is_none());

Dyn Compatibility

This trait is not dyn compatible.

In older versions of Rust, dyn compatibility was called "object safety", so this trait is not object safe.

Implementations on Foreign Types

impl StrExt for &str

fn splitn_exact<'a, P: Into<AltPattern<'a>>>( &'a self, n: usize, pat: P, ) -> Option<Vec<&'a str>>

Implementors