+!


lists operators
Since v1.2.0
Available on all platforms
See also

The +! operator adds the element on top of the stack to the set or list below it. The element is added to the existing collection.

Signature

Examples

[ 1 2 3 ] 'list' STORE // Regular '+' creates a new list so $list does not contain '4' $list 4 + // in place '+!' adds the element to the existing list $list 5 +! // same effect as 6 +! $list [ 6 ] APPEND
( 'alpha' 'beta' ) 'gamma' +! 'alpha' +! //set guarantee items uniqueness 'argh' +! SET-> //turn into list to display the result. Sets cannot be displayed on the stack.