Detailed Explanation of IOS Development to Judge Whether the Data in Two Arrays Are the Same

Detailed Explanation of IOS Development to Judge Whether the Data in Two Arrays Are the Same

Foreword:

The problems encountered in work, recorded here, may help everyone

Example code:

NSArray *array1 = [NSArray arrayWithObjects:@"a", @"b", @"c", nil nil]; 
NSArray *array2 = [NSArray arrayWithObjects:@"b", @"a", @"c", nil nil]; 
bool bol = false; 
 
// Create two new arrays  
NSMutableArray *oldArr = [NSMutableArray arrayWithArray:array1]; 
NSMutableArray *newArr = [NSMutableArray arrayWithArray:array2]; 
 
// Pair array 1 Sort.  
[oldArr sortUsingComparator:^NSComparisonResult(id obj1, id obj2){ 
  return obj1 > obj2; 
}]; 

//// The previous sort doesn't seem to work, so the following one should be used 
[oldArr sortUsingComparator:^NSComparisonResult(id obj1, id obj2){return [obj1 localizedStandardCompare: obj2];}];
 
// Pair array 2 Sort.  
[newArr sortUsingComparator:^NSComparisonResult(id obj1, id obj2){ 
   return obj1 > obj2; 
   }]; 
//// The previous sort doesn't seem to work, so the following one should be used 
[newArr sortUsingComparator:^NSComparisonResult(id obj1, id obj2){return [obj1 localizedStandardCompare: obj2];}];

 
if (newArr.count == oldArr.count) { 
   
  bol = true; 
  for (int16_t i = 0; i < oldArr.count; i++) { 
     
    id c1 = [oldArr objectAtIndex:i]; 
    id newc = [newArr objectAtIndex:i]; 
    
    if (![newc isEqualToString:c1];) { 
     bol = false; 
     break; 
     } 
   } 
 } 
 
if (bol) {  
  NSLog(@" The contents of both arrays are the same! ");  
}  
else {  
  NSLog(@" The contents of the two arrays are different! ");  
} 

Thank you for reading, hope to help everyone, thank you for your support to this site!