Sha256: 23615433547c9230f7cfbc0f5b122918b0e333d2769e484892ff7ed076dbf592
Contents?: true
Size: 1.54 KB
Versions: 262
Compression:
Stored size: 1.54 KB
Contents
#import "BracketPushExample.h"
@implementation BracketPushExample
+ (BOOL)validateBracketPairingAndNestingInString:(NSString *)string {
NSDictionary *brackets = @{@")" : @"(",
@"]" : @"[",
@"}" : @"{" };
NSMutableArray *stack = [[NSMutableArray alloc] init];
NSRange textRange = NSMakeRange(0, string.length);
__block BOOL mismatch = NO;
[string enumerateSubstringsInRange:textRange
options:NSStringEnumerationByComposedCharacterSequences
usingBlock:^(NSString * _Nullable
substring,
NSRange substringRange,
NSRange enclosingRange,
BOOL * _Nonnull stop)
{
if ([[brackets allValues] containsObject:substring]) {
[stack addObject:substring];
} else if ([[brackets allKeys] containsObject:substring]) {
NSString *last = [stack lastObject];
if (last) {
[stack removeLastObject];
if (![last isEqualToString:brackets[substring]]) {
mismatch = YES;
*stop = YES;
}
} else {
mismatch = YES;
*stop = YES;
}
}
}];
if (mismatch) {
return NO;
}
return [stack count] == 0;
}
@end
Version data entries
262 entries across 262 versions & 1 rubygems