# Reducible

`class Reducible[t: Type -> Type]`

SourceA trait for types that can be reduced to a summary value.

`Reducible`

is like a non-empty `Foldable`

and may only be implemented on non-empty data structures.

## Signatures

## Class Definitions

Returns the number of elements in `t`

that satisfy the predicate `f`

.

Returns `t`

as a list without the longest prefix that satisfies the predicate `f`

.

Returns `true`

if and only if at least one element in `t`

satisfies the predicate `f`

.

Alias for `findLeft`

.

Optionally returns the first element of `t`

that satisfies the predicate `f`

when searching from left to right.

Optionally returns the first element of `t`

that satisfies the predicate `f`

when searching from left to right.

Optionally returns the first element of `t`

that satisfies the predicate `f`

when searching from right to left.

Alias for `reduce`

.

Reduce `t`

using the derived `SemiGroup`

instance.

Left-associative fold of a structure.
Applies `f`

to a start value `s`

and all elements in `t`

going from left to right.

Right-associative fold of a structure.
Applies `f`

to a start value `s`

and all elements in `t`

going from right to left.

`def foldRightWithCont(f: a -> ((Unit -> b \ ef) -> b \ ef), z: b, t: t[a]): b \ ef with Reducible[t]`

SourceRight-associative fold of a structure.
Applies `f`

to a start value `s`

and all elements in `t`

going from right to left.

A `foldRightWithCont`

allows early termination by not calling the continuation.

Returns `true`

if and only if all elements in `t`

satisfy the predicate `f`

.

Applies `f`

to each element in `t`

.

Returns `t`

as a list with `a`

inserted between every two adjacent elements.

Finds the largest element of `t`

according to the `Order`

on `a`

.

Finds the largest element of `t`

according to the given comparator `cmp`

.

Returns `true`

if and only if the element `a`

is in `t`

.

Finds the smallest element of `t`

according to the `Order`

on `a`

.

Finds the smallest element of `t`

according to the given comparator `cmp`

.

Reduce `t`

using the derived `SemiGroup`

instance.

Left-associative reduction on `t`

using `f`

.

Applies `f`

to each element of `t`

and combines them using the derived `SemiGroup`

instance.

Right-associative reduction on `t`

using `f`

.

Returns the sum of all elements in `t`

according to the function `f`

.

Returns the longest prefix of `t`

as a list that satisfies the predicate `f`

.