iteragain/dist/esm/internal/TapIterator.js

Javascript Iterable/Iterator/Generator-function utilities.

/** Tap into the values of an iterator. `func` does not modify values passed to it as it's return value is unused. */
export class TapIterator {
    constructor(iterator, func) {
        this.iterator = iterator;
        this.func = func;
    }
    [Symbol.iterator]() {
        return this;
    }
    next(...args) {
        const next = this.iterator.next(...args);
        if (!next.done)
            this.func(next.value);
        return next;
    }
}
export default TapIterator;
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