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ID: ruby-best-practices/hash-literals
Language: Ruby
Severity: Notice
Category: Best Practices
The rule “Use new syntax when keys are symbols” is a coding standard in modern Ruby development. It encourages the use of the new hash syntax, introduced in Ruby 1.9, where symbols are used as keys. The old hash rocket syntax (:symbol => value
) is replaced with the more elegant and succinct symbol: value
syntax.
This rule is important as it promotes a cleaner, more readable code. The new syntax is more concise and less cluttered, making it easier to understand the structure and purpose of the hash. This is particularly beneficial in large codebases or when hashes are nested or complex.
To adhere to this rule, always use the new syntax when defining hashes where keys are symbols. Instead of defining a hash with :symbol => value
, use symbol: value
. This approach will not only make your code more readable but also ensure consistency across your codebase.
values = { :foo => 42, :bar => 99, :baz => 123 }
values = { foo: 42, bar: 99, baz: 123 }
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