when ( ..a ? true: ( ..a -- ..a ) -- ..a ) (original) (raw)
Vocabulary
kernel
Inputs
| ? | a generalized boolean |
|---|---|
| true | a quotation |
Outputs
None
Word description
If cond is not f, calls the true quotation.
The cond value is removed from the stack before the quotation is called.
Examples
USING: kernel math prettyprint ; -5 dup 0 < [ 3 + ] when .
-2
Definition
: when ( ..a ? true: ( ..a -- ..a ) -- ..a ) [ ] if ; inline