Is there a javascript equivalent of Python\'s zip function? That is, given multiple arrays of equal lengths create an array of pairs.
For instance, if I have three
A variation of the lazy generator solution:
function* iter(it) {
yield* it;
}
function* zip(...its) {
its = its.map(iter);
while (true) {
let rs = its.map(it => it.next());
if (rs.some(r => r.done))
return;
yield rs.map(r => r.value);
}
}
for (let r of zip([1,2,3], [4,5,6,7], [8,9,0,11,22]))
console.log(r.join())
// the only change for "longest" is some -> every
function* zipLongest(...its) {
its = its.map(iter);
while (true) {
let rs = its.map(it => it.next());
if (rs.every(r => r.done))
return;
yield rs.map(r => r.value);
}
}
for (let r of zipLongest([1,2,3], [4,5,6,7], [8,9,0,11,22]))
console.log(r.join())
And this is the python's classic "n-group" idiom zip(*[iter(a)]*n)
:
triples = [...zip(...Array(3).fill(iter(a)))]