One Swift mistake everyone should stop making today
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Swift developers should use the native replacing(_:with:) method instead of replacingOccurrences(of:with:) to avoid Unicode-related bugs. The Objective-C method replacingOccurrences doesn't handle Unicode properly, particularly with emoji flags composed of regional indicator symbols. This can cause bizarre string mutations where replacing non-existent characters produces unexpected results. The Swift-native replacing method honors Unicode fully, is shorter to write, and likely faster.
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