Lambda
Published Jul 30, 2021Updated Sep 9, 2021
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In Ruby, lambdas are anonymous function code blocks that can take zero or more arguments. They can then be stored or passed in other values and called primarily with the #call
method.
Syntax
If zero arguments are used, use either ->
or lambda
:
myLambda = lambda { puts "Hello, World!" }puts myLambda.call # Output: Hello, World!
If 1 or more arguments are used, use ->
:
myLambda = -> (v) { v * 2 }puts myLambda.call(2) # Output: 4
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