RosettaCodeData/Task/Optional-parameters/Slate/optional-parameters.slate

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s@(Sequence traits) tableSort &column: column &sortBy: sortBlock &reverse: reverse
[
column `defaultsTo: 0.
sortBlock `defaultsTo: [| :a :b | (a lexicographicallyCompare: b) isNegative].
(reverse `defaultsTo: False)
ifTrue: [sortBlock := [| :a :b | (sortBlock applyTo: {a. b}) not]].
s sortBy: [| :a :b | sortBlock applyTo: {a at: column. b at: column}]
].