36 lines
880 B
Julia
36 lines
880 B
Julia
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# A lambda function is made with an arrow from the arguments
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# to the function body
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f = x -> 2x^2
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@show f(2)
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# If the function takes more then one argument, parenthesis are required
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g = (x, y) -> x * y
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@show g(2, 3)
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# This also holds for functions taking no arguments
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p = () -> Float64(π)
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@show p()
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# Function currying is possible, so if anyone wants to do lambda calculus
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# feel free.
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h = x -> y -> x / y
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@show h(12)(4)
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# If a function has to be written over multiple lines, this can be done
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# with a "begin" block.
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fib = n -> begin
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a, b = 0, 1
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for i in 1 : n
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a, b = b, a + b
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end
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a
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end
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@show fib.(0:6)
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# Lambdas can be useful when passing a function as an argument
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# without wanting to give it a name. Here is an example using a lambda
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# instead of using the do-syntax for file handling
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s = open(io -> String(read(io)), "test.txt", "r")
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println(s)
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