30-seconds-of-code/snippets/every.md

title, type, tags, cover, dateModified

title	type	tags	cover	dateModified
Test if every list element is truthy	snippet	list	walking	2020-11-02T19:27:53+02:00

Checks if the provided function returns True for every element in the list.

• Use all() in combination with map() and fn to check if fn returns True for all elements in the list.

def every(lst, fn = lambda x: x):
  return all(map(fn, lst))

every([4, 2, 3], lambda x: x > 1) # True
every([1, 2, 3]) # True