# diffKeys()

The diffKeys method compares the collection against another collection or a plain object based on its keys. This method will return the key / value pairs in the original collection that are not present in the given collection:

const collection = collect({
  a: "a",
  b: "b",
  c: "c",
  d: "d"
});

const diff = collection.diffKeys({
  b: "b",
  d: "d"
});

diff.all();

//=> { a: 'a', c: 'c' }

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