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Versions: 396
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Stored size: 1.3 KB
Contents
#import "RomanNumeralsExample.h"
static NSDictionary<NSNumber *, NSString *>* arabicToRoman;
@implementation RomanNumerals
+ (void)initialize {
if (self == [RomanNumerals class]) {
arabicToRoman = @{
@1000 : @"M",
@900 : @"CM",
@500 : @"D",
@400 : @"CD",
@100 : @"C",
@90 : @"XC",
@50 : @"L",
@40 : @"XL",
@10 : @"X",
@9 : @"IX",
@5 : @"V",
@4 : @"IV",
@1 : @"I"
};
}
}
+ (NSString *)romanNumeralsForValue:(int)value {
NSMutableString *result = [[NSMutableString alloc] initWithString:@""];
NSSortDescriptor *highestToLowest = [NSSortDescriptor sortDescriptorWithKey:@"self" ascending:NO];
NSArray<NSNumber *> *sortedKeys = [[arabicToRoman allKeys] sortedArrayUsingDescriptors:@[highestToLowest]];
for (NSNumber *arabic in sortedKeys) {
while (value >= [arabic intValue]) {
[result appendString:arabicToRoman[arabic]];
value -= [arabic intValue];
}
}
return result;
}
@end
Version data entries
396 entries across 396 versions & 1 rubygems