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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-array. Try it out:
const array = require("extra-array");
var x = [1, 2, 3];
array.get(x, -1);
var x = [1, 2, 3, 4];
array.swap(x, 0, 1);
var x = [1, 2, 3, 4];
array.rotate(x, 1);
var x = [1, 3, 5, 7];
array.bsearch(x, 5);
[...array.permutations([1, 2, 3])];
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require()any package directly from npm- use arrow functions, classes, template strings, and most of ES6
awaitany promise instead of using callbacks (example)- create your own embedded node.js snippets
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