Arrow Functions

For simple logic, standard functions can be too verbose. dryLang supports JavaScript-style arrow functions using ->.

Single Parameter

f = x -> x * 2
pt(f(4)) // 8

Multiple Parameters

add2 = (a, b) -> a + b
pt(add2(2, 3)) // 5

Block Body

If your arrow function requires multiple lines, wrap the body in braces {} and explicitly use rev to return.

f2 = x -> {
    y = x * 2
    rev y + 1
}
pt(f2(5)) // 11

Passing as Arguments (Callbacks)

Arrow functions are perfect for passing logic as arguments into other functions.

fn apply(f, v) { 
    rev f(v) 
}

pt(apply(x -> x + 1, 10)) // 11