Determine if a string is collapsible: Difference between revisions

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(→‎{{header|Sidef}}: Added Swift solution using Regular Expressions)
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let collapsedStrings = strings.map { $0.replacingOccurrences( of: #"(.)(\1*)"#, with: "$1", options: .regularExpression)}
 
for (original, collapsed) in zip(strings, collapsedStrings) {
Retrieved from "https://rosettacode.org/wiki/Determine_if_a_string_is_collapsible"