Add check prop

This commit is contained in:
Angelos Chalaris
2020-01-02 16:49:25 +02:00
parent 038ed366c1
commit 1daa5e9e85

23
snippets/check_prop.md Normal file
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---
title: function_name
tags: utility,intermediate
---
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.
Return a `lambda` function that takes an object and applies the predicate function, `fn` to the specified property.
```py
def check_prop(fn, prop):
return lambda obj: fn(obj[prop])
```
```py
check_age = check_prop(lambda x: x >= 18, 'age')
user = {
'name': 'Mark',
'age': 18
}
check_age(user) # True
```