<div style='font-family:Arial; font-size:13px;'><div><br></div>hi,<div><br></div><div>I need some understanding on the following behavior:<br><div><br></div><div>a = [1..]</div><div><div>[x | x <-a, x <= 100]</div><div>[1,2,3,4,5,6,7,8,9,10,11,12,13,14,15,16,17,18,19,20,21,22,23,24,25,26,27,28,29,30,31,32,33,34,35,36,37,38,39,40,41,42,43,44,45,46,47,48,49,50,51,52,53,54,55,56,57,58,59,60,61,62,63,64,65,66,67,68,69,70,71,72,73,74,75,76,77,78,79,80,81,82,83,84,85,86,87,88,89,90,91,92,93,94,95,96,97,98,99,100</div><div><br></div><div>(note the missing ']' which results in the command not finishing)</div><div><br></div><div>b = take 1000 a</div><div><div>[x | x <-b, x <= 100]</div><div>[1,2,3,4,5,6,7,8,9,10,11,12,13,14,15,16,17,18,19,20,21,22,23,24,25,26,27,28,29,30,31,32,33,34,35,36,37,38,39,40,41,42,43,44,45,46,47,48,49,50,51,52,53,54,55,56,57,58,59,60,61,62,63,64,65,66,67,68,69,70,71,72,73,74,75,76,77,78,79,80,81,82,83,84,85,86,87,88,89,90,91,92,93,94,95,96,97,98,99,100]</div></div><div><br></div><div>Note, I took more for b  just for ease sake. But now the command finishes correctly.</div><div><br></div><div><br></div><div>Question:</div><div>why can i not use a lazy list directly in a list comprehension?</div><div><br></div><div>best,</div><div><br></div><div><br></div><br><div><div style="font-family:Arial; font-size:13px;"><br></div></div></div></div></div>