Python: Check if a given function returns True for every element in a list
Python List: Exercise - 243 with Solution
Write a Python program to check if a given function returns True for every element in a list.
Use all() in combination with map() and fn to check if fn returns True for all elements in the list.
Sample Solution:
Python Code:
def every(lst, fn = lambda x: x):
return all(map(fn, lst))
print(every([4, 2, 3], lambda x: x > 1))
print(every([4, 2, 3], lambda x: x < 1))
print(every([4, 2, 3], lambda x: x == 1))
Sample Output:
True False False
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Previous: Write a Python program to get the symmetric difference between two iterables, without filtering out duplicate values.
Next: Write a Python program to initialize a list containing the numbers in the specified range where start and end are inclusive and the ratio between two terms is step. Returns an error if step equals 1.
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Python: Tips of the Day
Given a predicate function, fn, and a prop string, this curried function will then take an object to inspect by calling the property and passing it to the predicate:
Example:
def tips_check_prop(fn, prop): return lambda obj: fn(obj[prop]) check_age = tips_check_prop(lambda x: x >= 25, 'age') user = {'name': 'Owen', 'age': 25} print(check_age(user))
Output:
True
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