zena:iterable-utils

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import {…} from 'zena:iterable-utils';

Classes

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final class FilterIterator<T> implements Iterator<T>

Implements Iterator<T>

An Iterator that yields elements matching a predicate.

Constructors

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new(iter: Iterator<T>, predicate: (item: T) => boolean)

Methods

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next(): inline (true, T) | inline (false, _)

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final class FilteredIterable<T> implements Iterable<T>

Implements Iterable<T>

An Iterable that lazily filters elements using a predicate.

Constructors

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new(source: Iterable<T>, predicate: (item: T) => boolean)

Methods

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filter(predicate: (item: T) => boolean): Iterable<T>

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contains(value: T): boolean

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all(predicate: (item: T) => boolean): boolean

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some(predicate: (item: T) => boolean): boolean

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fold<R>(initial: R, combine: (acc: R, item: T) => R): R

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find(predicate: (item: T) => boolean): inline (true, T) | inline (false, _)

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mixin IterableUtils<T> on Iterable<T>

Extends Iterable<T>

Common iteration utilities for any collection that implements Iterable.

Methods

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filter(predicate: (item: T) => boolean): Iterable<T>

Returns a new iterable containing only the elements that match the predicate.

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contains(value: T): boolean

Checks if the collection contains the specified value using equality.

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all(predicate: (item: T) => boolean): boolean

Returns true if all elements match the given predicate. Returns true if the collection is empty.

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some(predicate: (item: T) => boolean): boolean

Returns true if at least one element matches the given predicate. Returns false if the collection is empty.

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fold<R>(initial: R, combine: (acc: R, item: T) => R): R

Reduces the collection to a single value by accumulating state.

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find(predicate: (item: T) => boolean): inline (true, T) | inline (false, _)

Finds the first element that matches the predicate. Returns an inline tuple (true, item) if found, or (false, _) if not.