Lambda Expression

Lambda expression is a function definition with only one statement.

Syntax

def <functionName>(parameters): expression

or

def (parameters): expression

or

def (parameters) -> expression

or

parameter -> expression

Details

Note that the second and third case in the syntax are also anonymous functions.

The last case in the syntax applies when there is only one parameter.

Examples

$ def f(x):x pow 2 + 3*x + 4.0;
$ f(2);
14

$ def orderby(x,y): x[isort y];
$ t=table(3 1 7 as id, 7 4 9 as value);
$ orderby(t, t.id);

$ each(def(a,b):a+b, 1..10, 2..11);
[3,5,7,9,11,13,15,17,19,21]

$ g = def (x,y) -> log(x) + y pow 2;
$ g(e,0);
1

$ each(x->x+1,1 3 5)
[2,4,6]