dry-rb/dry-types

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lib/dry/types/constrained/coercible.rb

Summary

Maintainability
A
1 hr
Test Coverage
A
95%

Method try has a Cognitive Complexity of 10 (exceeds 5 allowed). Consider refactoring.
Open

        def try(input, &block)
          result = type.try(input)

          if result.success?
            validation = rule.(result.input)
Severity: Minor
Found in lib/dry/types/constrained/coercible.rb - About 1 hr to fix

Cognitive Complexity

Cognitive Complexity is a measure of how difficult a unit of code is to intuitively understand. Unlike Cyclomatic Complexity, which determines how difficult your code will be to test, Cognitive Complexity tells you how difficult your code will be to read and comprehend.

A method's cognitive complexity is based on a few simple rules:

  • Code is not considered more complex when it uses shorthand that the language provides for collapsing multiple statements into one
  • Code is considered more complex for each "break in the linear flow of the code"
  • Code is considered more complex when "flow breaking structures are nested"

Further reading

Use a guard clause instead of wrapping the code inside a conditional expression.
Open

          if result.success?

Use a guard clause instead of wrapping the code inside a conditional expression

Example:

# bad
def test
  if something
    work
  end
end

# good
def test
  return unless something
  work
end

# also good
def test
  work if something
end

# bad
if something
  raise 'exception'
else
  ok
end

# good
raise 'exception' if something
ok

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