30 lines
551 B
JavaScript
30 lines
551 B
JavaScript
/**
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* @license
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* Copyright 2021 Google LLC
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* SPDX-License-Identifier: BSD-3-Clause
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*/
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/**
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* Returns an iterable containing the result of calling `f(value)` on each
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* value in `items`.
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*
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* @example
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*
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* ```ts
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* render() {
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* return html`
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* <ul>
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* ${map(items, (i) => html`<li>${i}</li>`)}
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* </ul>
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* `;
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* }
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* ```
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*/
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export function* map(items, f) {
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if (items !== undefined) {
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let i = 0;
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for (const value of items) {
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yield f(value, i++);
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}
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}
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}
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//# sourceMappingURL=map.js.map
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