Objective-C Language NSDictionary Check if NSDictionary already has a key or not
Example
Objective c:
//this is the dictionary you start with.
NSDictionary *dict = [NSDictionary dictionaryWithObjectsAndKeys:@"name1", @"Sam",@"name2", @"Sanju",nil];
//check if the dictionary contains the key you are going to modify. In this example, @"Sam"
if (dict[@"name1"] != nil) {
//there is an entry for Key name1
}
else {
//There is no entry for name1
}
