anujose1989

- (NSInteger) findHammingDistance: (NSInteger)one : (NSInteger)two {
    NSInteger count = 0;
    NSInteger xor = one ^ two;
    
    while (xor) {
        count += (xor & 1);
        xor = xor >> 1;
    }
    
    return count;

anujose1989

-(BOOL) HasRobotReturnedToOrigin : (NSString *) path
{
    NSInteger i = 0;
    NSInteger verticalCounter = 0;
    NSInteger horizontalCounter = 0;
    while (i < path.length)
    {
        if ([[path substringWithRange:NSMakeRange(i, 1)] isEqualToString:@"U"])
        {
            verticalCounter++;

anujose1989

//Method 1
-(NSArray *) sortArrayByParityIIMethodOne : (NSMutableArray *) arr
{
    NSString* temp;
    NSInteger oddIndex = 1;
    for (NSInteger i = 0; i < arr.count ; i=i+2)
    {
        temp = [arr objectAtIndex:i];
        // If index is even and value not even :
        if (i % 2 == 0 && [arr[i]intValue] % 2 != 0){

anujose1989

-(NSInteger) PeakIndex : (NSArray *) A
{
    for (NSInteger i = 1 ; i < A.count-1 ; i++)
    {
        if (([A objectAtIndex:i-1] < [A objectAtIndex:i]) 
                   && ([A objectAtIndex:i+1] < [A objectAtIndex:i]))
        {
            return i;
        }
    }

anujose1989

-(NSString *) ToLowerCase : (NSMutableString *) inputString
{
    NSInteger i = 0;
    while (i < inputString.length)
    {
        int character = [inputString characterAtIndex:i];
        if (character < 97)
        {
            [inputString replaceCharactersInRange:NSMakeRange(i, 1) 
                    withString:[NSString stringWithFormat:@"%c",character+32]];

anujose1989

- (NSInteger) jewelCountFromStone : (NSString*) stone : (NSString*) jewel
{
    NSInteger count = 0;
    NSMutableDictionary *hashmap = [[NSMutableDictionary alloc]initWithCapacity:jewel.length];
    for ( NSInteger i = 0; i< jewel.length; i++)
    {
        [hashmap setValue:[NSNumber numberWithInteger:1] forKey: [jewel substringWithRange:NSMakeRange(i,1)]];
    }
    for ( NSInteger i = 0 ; i <stone.length ; i++)
    {

anujose1989

- (NSArray *) anagramMapping :(NSMutableArray *) a :  (NSMutableArray *) b
{
    NSMutableArray *output = [[NSMutableArray alloc]initWithCapacity:a.count];
    NSMutableDictionary *hashtable = [[NSMutableDictionary alloc]init];
    
    for (NSInteger i = 0; i < b.count ;i++)
    {
        [hashtable setObject:[NSNumber numberWithInteger:i] forKey:[b[i] stringValue]];
    }
    for (NSInteger i = 0; i < a.count ;i++)