30-seconds-of-code/snippets/min-by.md

title, type, tags, cover, dateModified

title	type	tags	cover	dateModified
Min list value based on function	snippet	math list	purple-flower-field	2020-11-02T19:28:27+02:00

Returns the minimum value of a list, after mapping each element to a value using the provided function.

• Use map() with fn to map each element to a value using the provided function.
• Use min() to return the minimum value.

def min_by(lst, fn):
  return min(map(fn, lst))

min_by([{ 'n': 4 }, { 'n': 2 }, { 'n': 8 }, { 'n': 6 }], lambda v : v['n']) # 2