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Python: Minimum value of a list, after mapping each element to a value using a giving function

Python List: Exercise - 249 with Solution

Write a Python program to get the minimum value of a list, after mapping each element to a value using a given function.

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

Sample Solution:

Python Code:

def min_by(lst, fn):
  return min(map(fn, lst)) 
print(min_by([{ 'n': 4 }, { 'n': 2 }, { 'n': 8 }, { 'n': 6 }], lambda v : v['n'])) 

Sample Output:

2

Flowchart:

Flowchart: Minimum value of a list, after mapping each element to a value using a giving function.

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Python: Tips of the Day

Floor Division:

When we speak of division we normally mean (/) float division operator, this will give a precise result in float format with decimals.

For a rounded integer result there is (//) floor division operator in Python. Floor division will only give integer results that are round numbers.

print(1000 // 300)
print(1000 / 300)

Output:

3
3.3333333333333335