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

title, tags

title	tags
min_by	math,list,function,beginner

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, convert to a list and use min() to return the minimum value.

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

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