head
function:
Extract a string header.
If the first argument is a string and the second argument is a positive integer, the returned value will be a string with the beggining of the first argument.
See also take
.
Examples:
- running:
(head "test-123", 4)
will give:"test"
- running:
(head "test-123", 20)
will give:"test-123"
- running:
(head 20, 20)
will return nothing
- running:
(head "20", -5)
will return nothing