Emulating Python's zip() and zip_longest() in JavaScript
2020-11-26
javascriptcode_idioms
This is essentially how you emulate the way Python's zip()
function works using JavaScript.
What makes this possible is the fact that JavaScript array methods — map()
, forEach()
and even filter()
— take up to three arguments (element, index, array) while they iterate through the array.
In which element
is the element that the iterator points to at each step, index
is the index of this item in the original array. And it's worth noting the third argument is the original array. ⋯