mirror of
https://github.com/jbranchaud/til
synced 2026-01-05 16:18:01 +00:00
24 lines
544 B
Markdown
24 lines
544 B
Markdown
# Are They All True?
|
|
|
|
There is a method on `Enumerable` that allows you to check against
|
|
everything in a collection. This is the `all?` method.
|
|
For instance, if you want to check if an array of values are all
|
|
true, you can call it without arguments:
|
|
|
|
```ruby
|
|
> [true, true, true].all?
|
|
# true
|
|
> [true, false, true].all?
|
|
# false
|
|
```
|
|
|
|
You can also pass it a block which is helpful if you want to check an
|
|
attribute or method on a collection of objects, like so:
|
|
|
|
```ruby
|
|
> employees.all?(&:salaried?)
|
|
# true
|
|
> [1,2,3,4,5].all?(&:odd?)
|
|
# false
|
|
```
|