1 unstable release
0.1.0 | Apr 20, 2024 |
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#944 in Rust patterns
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7KB
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zip_clone
Zip an iterator to a repeately cloned object.
Pass an owned object that implements Clone
to create an iterator that zips
the original iterator with clones of the object.
One iteration returns the original object, hence using one fewer clones than
iter.zip(repeat_with(|| cloned.clone()))
.
This is useful for loops where a value is cloned for each iteration, but is not used after the iteration.
Instead of cloning a value 10 times using:
let v = vec![];
let s = String::from("Hello");
for i in 0..10 {
let s = s.clone();
vec.push(s);
}
clone the value 9 times using:
use zip_clone::ZipClone as _;
let v = vec![];
let s = String::from("Hello");
for (i, s) in (0..10).zip_clone(s) {
vec.push(s);
}
lib.rs
:
Zip an iterator to a repeately cloned object.
Pass an owned object that implements Clone
to create an iterator that zips
the original iterator with clones of the object.
One iteration returns the original object, thus using one fewer clones than
the otherwise equivalent iter.zip(repeat_with(|| cloned.clone()))
.
Example:
use zip_clone::ZipClone;
let s = String::from("Hello");
let iter = 0..10;
for (i, s) in iter.zip_clone(s) {
assert_eq!(s, String::from("Hello"));
}