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

title, tags, firstSeen, lastUpdated

title	tags	firstSeen	lastUpdated
Find matching value	list,beginner	2020-03-10T22:38:48+02:00	2020-11-02T19:27:53+02:00

Finds the value of the first element in the given list that satisfies the provided testing function.

• Use a list comprehension and next() to return the first element in lst for which fn returns True.

def find(lst, fn):
  return next(x for x in lst if fn(x))

find([1, 2, 3, 4], lambda n: n % 2 == 1) # 1