22 lines
380 B
JavaScript
22 lines
380 B
JavaScript
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'use strict';
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function take(it, n) {
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const result = [];
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for (const e of it) {
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if (--n < 0)
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break;
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result.push(e);
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}
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return result;
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}
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function previewMapIterator(it, n) {
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return take(%MapIteratorClone(it), n);
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}
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function previewSetIterator(it, n) {
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return take(%SetIteratorClone(it), n);
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}
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module.exports = { previewMapIterator, previewSetIterator };
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