replace_if_exists
function:
-
Can also be called as
insert_if_exists
-
Can also be called as
put_if_exists
-
Can also be called as
{+}
Add a new entry to a map if it has such key. The first argument should be an object. The second argument should be a key. The third argument should be a value. If the object dosen't has that key, it will not be replaced.
Examples:
- running:
(replace_if_exists {}, "a", 1)
will give:{}
Because The object has no value for keya
.
- running:
(replace_if_exists {"a": 10, "b": 22}, "a", -1)
will give:{"a": -1, "b": 22}
- running:
(replace_if_exists [], "a", 1)
will return nothing
- running:
(replace_if_exists {}, 1, 1)
will return nothing
- running:
(replace_if_exists {}, "1", ({} {} 1 1))
will return nothing