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Created November 20, 2012 17:48
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Lambda syntax guidelines
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gistfile1.md

  • The new lambda literal syntax is preferred in Ruby 1.9.

    # BAD
lambda = lambda { |a, b| a + b }

# GOOD
lambda = ->(a, b) { a + b }

  • Always use #call to execute a lambda:

    add = lambda { |a, b| a + b }

# BAD
add.(1, 2)

# BAD
add[1, 2]

# ACCEPTABLE (use your judgement in context)
add.call 1, 2

# GOOD
add.call(1, 2)
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