How to use Comparator in Java to sort

There are a couple of awkward things with your example class: it’s called People while it has a price and info (more something for objects, not people); when naming a class as a plural of something, it suggests it is an abstraction of more than one thing. Anyway, here’s a demo of how to use a Comparator<T>: EDIT And an … Read more

How to sort 2d array by row in python?

Python, per se, has no “2d array” — it has (1d) lists as built-ins, and (1d) arrays in standard library module array. There are third-party libraries such as numpy which do provide Python-usable multi-dimensional arrays, but of course you’d be mentioning such third party libraries if you were using some of them, rather than just saying “in Python”, right?-) … Read more