yields an association from which elements with keys keyi have been dropped.
gives a list of associations.
- KeyDrop preserves the original order of elements.
- Any keyi that does not appear in assoc is ignored.
- KeyDrop can be applied not only to Association objects, but also to lists of rules.
- KeyDrop[keys][expr] is equivalent to KeyDrop[expr,keys].
Basic Examples (7)
Delete entry with the specified key from association:
Delete entries, given a list of keys:
Delete entries from several associations, given a list of keys:
Delete entries from a list of rules, given a key:
Delete entries from several lists:
Delete from a mixed list of an association and a list of rules:
Use the operator form of KeyDrop:
Wolfram Research (2014), KeyDrop, Wolfram Language function, https://reference.wolfram.com/language/ref/KeyDrop.html.
Wolfram Language. 2014. "KeyDrop." Wolfram Language & System Documentation Center. Wolfram Research. https://reference.wolfram.com/language/ref/KeyDrop.html.
Wolfram Language. (2014). KeyDrop. Wolfram Language & System Documentation Center. Retrieved from https://reference.wolfram.com/language/ref/KeyDrop.html