Swift Style: An Opinionated Guide to an Opinionated Language by Erica Sadun

Author:Erica Sadun [Sadun, Erica]
Language: eng
Format: azw3
Tags: Pragmatic Bookshelf
Publisher: Pragmatic Bookshelf
Published: 2017-03-30T04:00:00+00:00

switch statement targets of opportunity include any pattern matching that can be listed in a truth or state table. Refactor if statements that traverse multi-element truth tables.

When your switch statement is interested in only one case, consider whether it’s better represented as an if statement.

Combine the states that matter most into a unifying tuple and perform pattern matching against that tuple.

Use where clauses for logic that applies to only one or two cases at most.

Prefer wildcard (_) pattern matching when representing “don’t care” conditions, even when coding logic has narrowed that argument to one remaining value. Including an actual value detracts from the “don’t care” meaning.

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