19 lines
416 B
Markdown
19 lines
416 B
Markdown
---
|
|
title: every
|
|
tags: list,function,intermediate
|
|
---
|
|
|
|
Returns `True` if the provided function returns `True` for every element in the list, `False` otherwise.
|
|
|
|
Use `all()` in combination with `map` and `fn` to check if `fn` returns `True` for all elements in the list.
|
|
|
|
```py
|
|
def every(lst, fn=lambda x: x):
|
|
return all(map(fn, lst))
|
|
```
|
|
|
|
```py
|
|
every([4, 2, 3], lambda x: x > 1) # True
|
|
every([1, 2, 3]) # True
|
|
```
|