Created
May 18, 2014 08:59
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#import <Foundation/Foundation.h> | |
@interface NSString (Snakecase) | |
@property (nonatomic, readonly) NSString *snakecaseString; | |
@end |
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#import "NSString+Snakecase.h" | |
@implementation NSString (Snakecase) | |
- (instancetype)snakecaseString | |
{ | |
NSString *scannedString; | |
NSMutableString *snakecaseString = [NSMutableString new]; | |
NSCharacterSet *uppercaseLetterCharacterSet = [NSCharacterSet uppercaseLetterCharacterSet]; | |
NSScanner *scanner = [NSScanner scannerWithString:self]; | |
while (!scanner.isAtEnd) { | |
if ([scanner scanCharactersFromSet:uppercaseLetterCharacterSet intoString:&scannedString]) { | |
[snakecaseString appendString:scannedString.lowercaseString]; | |
} | |
if ([scanner scanUpToCharactersFromSet:uppercaseLetterCharacterSet intoString:&scannedString]) { | |
[snakecaseString appendString:scannedString]; | |
[snakecaseString appendString:@"_"]; | |
} | |
} | |
return [snakecaseString stringByTrimmingCharactersInSet:[NSCharacterSet characterSetWithCharactersInString:@"_"]]; | |
} | |
@end |
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