functions/test_lambdas.rb

tests/_examples/functions/test_lambdas.rb in the metorex repository.

# Lambda parsing tests
# Single parameter arrow lambda
add_ten = ->(x) { x + 10 }
puts add_ten.call(0)

# Multi-parameter arrow lambda
add = ->(x, y) { x + y }
puts add.call(5, 5)

# Lambda do/end syntax
multiply = lambda do |x, y| x * y end
puts multiply.call(6, 7)

# Nested lambdas
outer = lambda do |x|
  lambda do |y| x + y end
end
inner = outer.call(10)
puts inner.call(20)

# Lambda in array
func1 = ->(x) { x + 10 }
func2 = ->(x) { x - 5 }
func3 = ->(x) { x * 2 }
funcs = [func1, func2, func3]
puts funcs[0].call(3)
puts funcs[1].call(18)
puts funcs[2].call(9)

# Lambda with closure
base = 5
add_base = ->(x) { x + base }
puts add_base.call(6)
puts add_base.call(9)

# Chained calls
double = ->(x) { x * 2 }
add_one = ->(x) { x + 1 }
puts add_one.call(double.call(10))
puts double.call(add_one.call(11))
puts add_one.call(add_one.call(8))

Output: