Vadim Zaytsev aka @grammarware

**Caveat emptor**: these individual *card pages* are work in progress, and their content is in no way final!

List and set comprehensions are language constructs resembling the mathematical notation for creating a set by its characteristic function (*"for all numbers from 1 to 10, give me their squared values"*), and combine *map* and *filter* classical for functional programming. Comprehensions as a language construct exist in Haskell, Python, Rascal, C# and some other languages.

Produce a list of squares of numbers from 1 to 10 inclusively

Haskell[x*x | x <- [1..10]]Rascal

[x*x | x <- [1..11]]Python

[x*x for x in range(0,11)]C#

Enumerable.Range(1, 11).Select(x => x*x)

The DYOL toolkit was created and is maintained by Dr. Vadim Zaytsev a.k.a. @grammarware.
Page last updated in March 2021.