Proposal: Add last(where:) and lastIndex(where:) Methods to Collections #329
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natecook1000
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| Unfortunately, there are no such methods that search from the end. Finding the last of a particular kind of element has multiple applications, particularly with text, such as wrapping a long string into lines of a maximum length or trimming whitespace from the beginning and end of a string. | ||
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| You can work around this limitation by using the methods above on a reversed view of a collection, but the resulting code is truly dreadful. For example, to find the corresponding last index to `a.index(where: { $0 > 25 })`, something lik this unholy incantation is required: |
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Small typo here on "something like this"
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I'm closing out PRs for proposals that are out of scope for Swift 4 stage 1. When we open up the process to the point where this proposal can be in scope, please re-open the pull request. |
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The standard library should include methods for finding the last element of a collection that matches a predicate, along with the index of that element.
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