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This is a playground to test code. It runs a full Node.js environment and already has all of npm’s 1,000,000+ packages pre-installed, including extra-lists with all npm packages installed. Try it out:

const lists = require('extra-lists'); var x = [['a', 'b', 'c', 'd', 'e'], [1, 2, 3, 4, 5]]; lists.filter(x, v => v % 2 === 1); var x = [['a', 'b', 'c', 'd'], [1, 2, -3, -4]]; lists.some(x, v => v > 10); var x = [['a', 'b', 'c', 'd'], [1, 2, -3, -4]]; lists.min(x); var x = [['a', 'b', 'c'], [1, 2, 3]]; [...lists.subsets(x)].map(a => [[...a[0]], [...a[1]]]);

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extra-lists v2.2.10

Lists is a pair of key list and value list, with unique keys.

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