# Trait collections::slice::SliceConcatExt [−] [src]

    pub trait SliceConcatExt<T> where
        T: ?Sized, {
        type Output;
        fn concat(&self) -> Self::Output;
        fn join(&self, sep: &T) -> Self::Output;
        fn connect(&self, sep: &T) -> Self::Output;
    }

🔬 This is a nightly-only experimental API. (`slice_concat_ext` #27747)

trait should not have to exist

An extension trait for concatenating slices

## Associated Types

### `type Output`

🔬 This is a nightly-only experimental API. (`slice_concat_ext` #27747)

trait should not have to exist

The resulting type after concatenation

## Required Methods

### `fn concat(&self) -> Self::Output`
1.0.0

Flattens a slice of `T` into a single value `Self::Output`.

# Examples

    assert_eq!(["hello", "world"].concat(), "helloworld");
    assert_eq!([[1, 2], [3, 4]].concat(), [1, 2, 3, 4]);

### `fn join(&self, sep: &T) -> Self::Output`
1.3.0

Flattens a slice of `T` into a single value `Self::Output`, placing a given separator between each.

# Examples

    assert_eq!(["hello", "world"].join(" "), "hello world");
    assert_eq!([[1, 2], [3, 4]].join(&0), [1, 2, 0, 3, 4]);

### `fn connect(&self, sep: &T) -> Self::Output`
1.0.0

Deprecated since 1.3.0

: renamed to join

## Implementors

- `impl<S> SliceConcatExt<str> for [S] where
  S: Borrow<str>, type Output = String;`
- `impl<T, V> SliceConcatExt<T> for [V] where
  T: Clone,
  V: Borrow<[T]>, type Output = Vec<T>;`

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