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);
// output
14
def orderby(x,y): x[isort y];
t=table(3 1 7 as id, 7 4 9 as value);
orderby(t, t.id);| id | value |
|---|---|
| 1 | 4 |
| 3 | 7 |
| 7 | 9 |
each(def(a,b):a+b, 1..10, 2..11);
// output
[3,5,7,9,11,13,15,17,19,21]
g = def (x,y) -> log(x) + y pow 2;
g(e,0);
// output
1
each(x->x+1,1 3 5)
// output
[2,4,6]