derekli66

// Inspired by Blended Cocoa
// Reference: http://www.blendedcocoa.com/blog/2012/10/25/objective-c-literals-negative-array-subscripts/

#import <objc/runtime.h>

@implementation NSArray (CatchIndexOutOfRange)

+ (void)load
{
    static dispatch_once_t onceToken;

derekli66

When pod install or pod update gets hanged at "Analyzing dependencies", please consider to reinstall cocoapods.

#Uninstallation. Reference: http://superuser.com/questions/686317/how-to-fully-uninstall-the-cocoapods-from-the-mac-machine
$gem list --local | grep cocoapods

#The list will show like this
cocoapods (0.27.1, 0.20.2)
cocoapods-core (0.27.1, 0.20.2)
cocoapods-downloader (0.2.0, 0.1.2)

derekli66

char *stradd(const char *a, const char *b){
    size_t len = strlen(a) + strlen(b);
    char *ret = (char *)malloc(len * sizeof(char) + 1);
    return strcat(strcat(ret, a), b);
}
 
char *binaryConverter(int input_number) {
    int number = input_number;
    char *binaryString = (char *)malloc(sizeof(char));
    

derekli66

// 1. Before using following code snippet, make sure to add textfields on a UIScrollView
// 2. The following code snippet will lead the first responder textfield just top of showing keyboard.
// 3. The trick is to set enough scrolling space for scroll view to raise all textfields up. 
//    When target textfield is touched, the scroll view will do the animation automatically and raise textfields up.  
// 4. Do not combine other technique to raise up textfields over keyboard. 

- (instancetype)init 
{
   self = [super init];
   if (self) {

derekli66

size_t strlength(char const *string) {
    int length = 0;
    while (*string++ != '\0') {
        length += 1;
    }
    
    return length;
}

char *find_char(char const *source, char const *chars) {

derekli66

char *rewind_string(char *last_char) {
    // Prevent NUL byte.
    if (*last_char == '\0' || last_char == NULL) {
        return NULL;
    }
    
    char *first_char;
    
    // Rewind to the pointer pointing to first character.
    for (first_char = last_char; *first_char != '\0'; first_char--);

derekli66

#include <stdio.h>
#include <stdlib.h>
#include <String.h>

/* 
 * ===  FUNCTION  ======================================================================
 *         Name:  del_str
 *  Description:  Delete substring in the source string
 * =====================================================================================
 */

derekli66

/**
 Inspect input number to see if there is nil input or null object input
 
 @param aNumber an input number
 
 @return If nil input or null object input found, a NSNumber object with zero value will return.
 If the input is a NSStirng object, a NSNumber object contianing dobleValue of the string will return.
 
 @warning If input number is not a NSNumber or NSString, a NSNumber object containing zero will return.
 */

derekli66

void FindPrimeNumber(int size, int results[]) {
    // create elements array
    int *elements;
    elements = (int *)malloc(size * sizeof(int));
    
    for (int i = 0; i < size ; i++) {
        elements[i] = 1 ;
    }
    
    //start to cross out. Beginning from i = 2

derekli66

void
reverseStr(char *str)
{
   int len = 0;
   int init = 0;

   while (*(str + len) != '\0') {
        len++;
   }