1 The `keys()` function returns an array containing all keys of the given 2 dictionary value. The keys are sorted in declaration order. 3 4 -- Testcase -- 5 {{ keys({ "foo": true, "bar": false, "qrx": 123 }) }} 6 -- End -- 7 8 -- Expect stdout -- 9 [ "foo", "bar", "qrx" ] 10 -- End -- 11 12 13 If the given argument is not a dictionary, the function returns `null`. 14 15 -- Testcase -- 16 {{ keys(true) === null }} 17 -- End -- 18 19 -- Expect stdout -- 20 true 21 -- End --
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