Iterate through a range of dates in NodeJS

Question

I would like to iterate through a range of calender dates, each iteration is +1 day. I would use something built around JodaTime in Java - is there something similar in NodeJS?

Answer 1

You can use moment.js in a node.js application.

npm install moment 

Then you can very easily do this:

var moment = require('moment');  var a = moment('2013-01-01'); var b = moment('2013-06-01');  // If you want an exclusive end date (half-open interval) for (var m = moment(a); m.isBefore(b); m.add(1, 'days')) {   console.log(m.format('YYYY-MM-DD')); }  // If you want an inclusive end date (fully-closed interval) for (var m = moment(a); m.diff(b, 'days') <= 0; m.add(1, 'days')) {   console.log(m.format('YYYY-MM-DD')); } 

Hmmm... this looks a lot like the code you already wrote in your own answer. Moment.js is a more popular library has tons of features, but I wonder which one performs better? Perhaps you can test and let us know. :)

But neither of these do as much as JodaTime. For that, you need a library that implements the TZDB in JavaScript. I list some of those here.

Also, watch out for problems with JavaScript dates in general. This affects NodeJS as well.

Answer 2

I would propose a change to the earlier response by Matt. His code will cause a mutation on the a object. try this...

var moment = require('moment'); var a = moment('2013-01-01'); var b = moment('2013-06-01');  for (var m = moment(a); m.isBefore(b); m.add(1, 'days')) {     console.log(m.format('YYYY-MM-DD')); }