List Comprehensions

List comprehensions in Erlang use || as a separator between expression and generators, but | is used in Hamler.

Hamler:

  1. [x*2 | x <- [1,2,3]]   -- [2,4,6]
  3. -- multiple generators
  4. [(x,y) | x <- [1,2,3], y <- [4,5]]
  6. -- dependent generators
  7. [(x,y) | x <- [1..3], y <- [x..3]]
  9. -- Conditions
  10. even i = 0 == i % 2
  11. [x | x <- [1..10], even x]

Erlang:

  1. [X*2 || X <- [1,2,3]]. %% [2,4,6]
  3. -- multiple generators
  4. [{X, Y} || X <- [1,2,3], Y <- [4,5]].
  6. -- dependent generators
  7. [{X, Y} || X <- [1,2,3], Y <- lists:seq(X,3)].
  9. -- Conditions
  10. even(I) -> 0 == (I rem 2).
  11. [X || X <- lists:seq(1, 10), even(X)].