mirror of
https://github.com/jbranchaud/til
synced 2026-01-03 15:18:01 +00:00
20 lines
670 B
Markdown
20 lines
670 B
Markdown
# Defaulting To Frozen String Literals
|
|
|
|
> The cold never bothered me anyway.
|
|
|
|
The release of Ruby 2.2 introduced the ability to freeze string literals,
|
|
making them immutable. With the release of Ruby 2.3, strings can be frozen
|
|
by default without the use of `#freeze`. By adding the following magic
|
|
comment at the top of a file
|
|
|
|
```ruby
|
|
# frozen_string_literal: true
|
|
```
|
|
|
|
all string literals will default to frozen. That means that all string
|
|
literals in that file are immutable, cannot be modified. This gives the Ruby
|
|
interpreter some performance gains due to reduced object allocation.
|
|
|
|
This is the [issue](https://bugs.ruby-lang.org/issues/11473) that introduced
|
|
it.
|