Re-arrange NSArray and NSDictionary entries - iphone

Question

I have array with nsdictionary objects, for ex.:
({"someKey" = "title";
"name" = "someName";
},
{"someKey" = "title";
"name" = "anotherName";
}
{"someKey" = "newTitle";
"name" = "someName";
}
)
Please, help me to sort it in this format:
({"someKey" = "title";
"names": (
{"name" = "someName"},
{"name" = "anotherName"}
)
},
{"someKey" = "newTitle";
"names": (
{"name" = "someName"}
)
}
)
Thanks..

Answer 1

As far as i understand from your question you want to pick individual objects into one single dictionary object..
NSArray *yourArray=.... /* array which contains this data: ({"someKey" = "title";
"name" = "someName";
},
{"someKey" = "title";
"name" = "anotherName";
}
)*/
NSMutableDictionary *newDictionary=[[NSMutableDictionary alloc]init];
for(int i=0;i<[yourArray count];i++){
[newDictionary setObject:[yourArray objectAtIndex:i] forKey:#"names"];
}

Answer 2

({"someKey" = "title";
"name" = "someName";
},
{"someKey" = "title";
"name" = "anotherName";
}
)
Assuming above is equivalent to
NSArray *array=[NSArray arrayWithObjects:dictionary1,dictionary2,nil];
then to achieve below result
(
{
"someKey" = "title";
"names": (
{"name" = "someName"},
{"name" = "anotherName"}
)
}
)
We have this :
//Get name array
NSMutableArray *names=[NSMutableArray array];
for(int i=0;i<[array count];i++)
{
NSDictionary *dictionary=[array objectAtIndex:i];
[names addObject:[dictionary valueForKey:#"name"];
}
NSDictionary *newDictionary=[NSDictionary dictionaryWithOjbectsAndKeys:#"someKey",#"title",names,#"names",nil];
//Your final result is an array with one object ( A Dictionary )
NSArray *finalArray=[NSArray arrayWithObjects: newDictionary,nil];

Answer 3

You just need to traverse the current structure and build a new dictionary with the title as the unique key:
NSEnumerator* arrayEnumerator = [myArray objectEnumerator];
NSDictionary* = dictFromArray;
NSMutableArray* titleArray = [[NSMutableArray alloc] init];
NSMutableDictionary* titleDict = [[NSMutableDictionary alloc] init];
while(dictFromArray = [arrayEnumerator nextObject])
{
currentTitle = [dictFromArray objectForKey:#"someKey"];
currentName = [dictFromArray objectForKey:#"name"];
if([titles containsObject:currentTitle)
{
NSMutableDictionary namesArray = [titleDict objectForKey:currentTitle];
[namesArray addObject:currentName];
}
else
{
[titles addObject:currentTitle];
[titleDict addObject:[NSMutableArray arrayWithObject:currentName] forKey:currentTitle];
}
}
This should give you a dictionary that looks like:
{
title =
(
someName,
anotherName
);
newTitle =
(
someName
)
}
To get the exact structure you have above, I think this should work:
NSArray* titleKeys = [titleDict allKeys];
NSEnumerator* keyEnumerator = [titleKeys objectEnumerator];
NSMutableArray* finalArray = [[NSMutableArray alloc] init];
NSString* key;
while (key = [keyEnumerator nextObject])
{
[finalArray addObject: [NSDictionary
dictionaryWithObjects:(key, [dictArray objectForKey:key])
forKeys:(#"someKey", #"names")]];
}