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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/symmetric-difference. Try it out:
const lists = require('extra-lists');
var x = [['a', 'b', 'c', 'd'], [1, 2, 3, 4]];
var y = [['c', 'd', 'e', 'f'], [30, 40, 50, 60]];
lists.symmetricDifference(x, y).map(c => [...c]);
var y = [['d', 'e', 'f'], [40, 50, 60]];
lists.symmetricDifference(x, y).map(c => [...c]);
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