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alaindet/range.js

Created September 15, 2024 23:14
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Python's `range` in JavaScript
Raw
range.js
// This is a generator function
// https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/Generator
function* range(minOrMax: number, max?: number) {
const maxExists = max !== undefined;
const inf = maxExists ? minOrMax : 0;
const sup = maxExists ? max : minOrMax;
for (let i = inf; i < sup; i++) {
yield i;
}
}
for (const i of range(10)) {
console.log(i);
}
// Prints: 0, 1, 2, 3, 4, 5, 6, 7, 8, 9
for (const j of range(10, 20)) {
console.log(j);
}
// Prints: 10, 11, 12, 13, 14, 15, 16, 17, 18, 19
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