i am making dictionary with 2 array one for keys(ids that you can see in Dic) and one for values(Birth dates that you can see in Dic) my dictionary look like this
100000297621293 = "08/31/1990";
100001904155266 = "12/30/1990";
100003248631105 = "05/27/1990";
100004327360299 = "01/01/1927";
100000157646688 = "08/22/1989";
100001069796883 = "12/03/1989";
100001475514001 = "03/09/1990";
100000717474427 = "08/05/1990";
100001221367192 = "08/05/1990";
100002586744158 = "04/15/1983";
this is just sample dic not full
then after i have another array with ids and im using that array for fetching birth dates from this Dic but i get null values plz help me my code is as below
NOTE: ARRAY WHICH I AM USING FOR KEY, ALWAYS EXIST AS KEY IN DIC
NSDictionary *birthdayDictionary =
[[NSDictionary alloc] initWithObjects:_parssedArrayOfFaceBook forKeys:_parssedArrayOfFaceBookUid];
NSLog(#"asdas%#",birthdayDictionary.description);
NSMutableArray *matches = [NSMutableArray array];
for (NSString *key in _selecteduid) {
NSLog(#" see it%#",key);
NSString *selectedBirthDate = [birthdayDictionary objectForKey:key];
NSLog(#" matched%#",selectedBirthDate);
[matches addObject:selectedBirthDate];
NSLog(#" matched%#",matches);
}
Why is *selectedBirthDate an NSMutableArray? The birth dates (values) are strings! not arrays!
NSString *selectedBirthDate = [birthdayDictionary objectForKey:key];
Assuming selecteduid is a retained property and it has values in it, this code would work fine.
NSDictionary *birthdayDictionary = [NSDictionary dictionaryWithObjects:self.parssedArrayOfFaceBook
forKeys:self.parssedArrayOfFaceBookUid];
NSMutableArray *matches = [#[] mutableCopy];
for (NSString *key in self.selecteduid){
NSString *selectedBirthDate = birthdayDictionary[key];
[matches addObject:selectedBirthDate];
}
Related
My brain is fried! I can't think.
i am new to iphone programming
am doing json parsing ....in that am storeing data from json to nsdictionary but .......
I want to add all nsdictionary float values from the dictionary to the array. This is what I am doing right now.As code below:
- (void)connectionDidFinishLoading:(NSURLConnection *)connection
{
[connection release];
NSString *responseString = [[NSString alloc] initWithData:responseData encoding:NSUTF8StringEncoding];
self.responseData = nil;
dict = [responseString JSONValue];
NSMutableArray *array = [NSMutableArray array];
for (NSString *key in [dict allKeys])
{
array = [dict objectForKey:key];
// array return float values but
[array addObject:array ]; // geting carsh dude to array return float values like 120.01
}
Please guide me i am not getting a part where i am doing a mistake.
Thanks in advance.
Your app is crashing because you are adding data to NSArray , this is static array, you can not add value at run time, so just Make NSMutableArray and add your data in NSMutableArray.
Your code is broken in a couple of ways.
This line assigns the array pointer to the object in the dictionary:
array = [dict objectForKey:key];
Then you are trying to add the array to itself, which does not make sense. But worse, since array does no longer point to your NSMutableArray you cannot even call that method.
[array addObject:array ];
You probably wanted to do something like this:
for (NSString *key in [dict allKeys])
{
id value = [dict objectForKey:key];
[array addObject:value];
}
I have an NSMutableArray that looks like this
{
"#active" = false;
"#name" = NAME1;
},
{
"#active" = false;
"#name" = NAME2;
}
Is there a way to convert this to an NSDictionary and then use objectForKey to get an array of the name objects? How else can I get these objects?
There is a even shorter form then this proposed by Hubert
NSArray *allNames = [array valueForKey:#"name"];
valueForKey: on NSArray returns a new array by sending valueForKey:givenKey to all it elements.
From the docs:
valueForKey:
Returns an array containing the results of invoking
valueForKey: using key on each of the array's objects.
- (id)valueForKey:(NSString *)key
Parameters
key The key to retrieve.
Return Value
The value of the retrieved key.
Discussion
The returned array contains NSNull elements for each object that returns nil.
Example:
NSArray *array = #[#{ #"active": #NO,#"name": #"Alice"},
#{ #"active": #NO,#"name": #"Bob"}];
NSLog(#"%#\n%#", array, [array valueForKey:#"name"]);
result:
(
{
active = 0;
name = Alice;
},
{
active = 0;
name = Bob;
}
)
(
Alice,
Bob
)
If you want to convert NSMutableArray to corresponding NSDictionary, just simply use mutableCopy
NSMutableArray *phone_list; //your Array
NSDictionary *dictionary = [[NSDictionary alloc] init];
dictionary = [phone_list mutableCopy];
This is an Array of Dictionary objects, so to get the values you would:
[[myArray objectAtIndex:0]valueForKey:#"name"]; //Replace index with the index you want and/or the key.
This is example one of the exmple get the emplyee list NSMutableArray and create NSMutableDictionary.......
NSMutableArray *emloyees = [[NSMutableArray alloc]initWithObjects:#"saman",#"Ruchira",#"Rukshan",#"ishan",#"Harsha",#"Ghihan",#"Lakmali",#"Dasuni", nil];
NSMutableDictionary *dict = [NSMutableDictionary dictionary];
for (NSString *word in emloyees) {
NSString *firstLetter = [[word substringToIndex:1] uppercaseString];
letterList = [dict objectForKey:firstLetter];
if (!letterList) {
letterList = [NSMutableArray array];
[dict setObject:letterList forKey:firstLetter];
}
[letterList addObject:word];
} NSLog(#"dic %#",dict);
yes you can
see this example:
NSDictionary *responseDictionary = [[request responseString] JSONValue];
NSMutableArray *dict = [responseDictionary objectForKey:#"data"];
NSDictionary *entry = [dict objectAtIndex:0];
NSString *num = [entry objectForKey:#"num"];
NSString *name = [entry objectForKey:#"name"];
NSString *score = [entry objectForKey:#"score"];
im sorry if i can't elaborate much because i am also working on something
but i hope that can help you. :)
No, guys.... the problem is that you are stepping on the KeyValue Mechanism in cocoa.
KeyValueCoding specifies that the #count symbol can be used in a keyPath....
myArray.#count
SOOOOOO.... just switch to the ObjectForKey and your ok!
NSMutableDictionary *myDictionary = [NSMutableDictionary dictionaryWithObjectsAndKeys:#"theValue", #"#name", nil];
id kvoReturnedObject = [myDictionary valueForKey:#"#name"]; //WON'T WORK, the # symbol is special in the valueForKey
id dictionaryReturnedObject = [myDictionary objectForKey:#"#name"];
NSLog(#"object = %#", dictionaryReturnedObject);
I have and array of many strings.
I wan't to sort them into a dictionary, so all strings starting the same letter go into one array and then the array becomes the value for a key; the key would be the letter with which all the words in it's value's array begin.
Example
Key = "A" >> Value = "array = apple, animal, alphabet, abc ..."
Key = "B" >> Value = "array = bat, ball, banana ..."
How can I do that?
Thanks a lot in advance!
NSArray *list = [NSArray arrayWithObjects:#"apple, animal, bat, ball", nil];
NSMutableDictionary *dict = [NSMutableDictionary dictionary];
for (NSString *word in list) {
NSString *firstLetter = [[word substringToIndex:1] uppercaseString];
NSMutableArray *letterList = [dict objectForKey:firstLetter];
if (!letterList) {
letterList = [NSMutableArray array];
[dict setObject:letterList forKey:firstLetter];
}
[letterList addObject:word];
}
NSLog(#"%#", dict);
You can achieve what you want through the following steps:
Create an empty but mutable dictionary.
Get the first character.
If a key for that character does not exist, create it.
Add the word to the value of the key (should be an NSMutableArray).
Repeat step #2 for all keys.
Here is the Objective-C code for these steps. Note that I am assuming that you want the keys to be case insensitive.
// create our dummy dataset
NSArray * wordArray = [NSArray arrayWithObjects:#"Apple",
#"Pickle", #"Monkey", #"Taco",
#"arsenal", #"punch", #"twitch",
#"mushy", nil];
// setup a dictionary
NSMutableDictionary * wordDictionary = [[NSMutableDictionary alloc] init];
for (NSString * word in wordArray) {
// remove uppercaseString if you wish to keys case sensitive.
NSString * letter = [[word substringWithRange:NSMakeRange(0, 1)] uppercaseString];
NSMutableArray * array = [wordDictionary objectForKey:letter];
if (!array) {
// the key doesn't exist, so we will create it.
[wordDictionary setObject:(array = [NSMutableArray array]) forKey:letter];
}
[array addObject:word];
}
NSLog(#"Word dictionary: %#", wordDictionary);
Take a look at this topic, they solves almost the same problem as you — filtering NSArray into a new NSArray in objective-c Let me know if it does not help so I will write for you one more code sample.
Use this to sort the contents of array in alphabetical order, further you design to the requirement
[keywordListArr sortUsingSelector:#selector(localizedCaseInsensitiveCompare:)];
I just wrote this sample. It looks simple and does what you need.
NSArray *names = [NSArray arrayWithObjects:#"Anna", #"Antony", #"Jack", #"John", #"Nikita", #"Mark", #"Matthew", nil];
NSString *alphabet = #"ABCDEFGHIJKLMNOPQRSTUWXYZ";
NSMutableDictionary *sortedNames = [NSMutableDictionary dictionary];
for(int characterIndex = 0; characterIndex < 25; characterIndex++) {
NSString *alphabetCharacter = [alphabet substringWithRange:NSMakeRange(characterIndex, 1)];
NSArray *filteredNames = [names filteredArrayUsingPredicate:[NSPredicate predicateWithFormat:#"SELF BEGINSWITH[C] %#", alphabetCharacter]];
[sortedNames setObject:filteredNames forKey:alphabetCharacter];
}
//Just for testing purposes let's take a look into our sorted data
for(NSString *key in sortedNames) {
for(NSString *value in [sortedNames valueForKey:key]) {
NSLog(#"%#:%#", key, value);
}
}
I have an array of NSDictionary.
NSDictionary* dictionary = [NSDictionary dictionaryWithObjects:bothUserName forKeys:bothUID]; // here array "bothUserName" and "bothUID" is an NSArray type
[dictionary keysSortedByValueUsingSelector:#selector(compare:)];
NSLog(#" dictionary objects %#",dictionary);
I am getting an output like this.
dictionary objects {
14172368 = webtickle;
271882407 = electrodealio;
314125883 = Coral5mz;
316212228 = ajaysinghHF2;
316348693 = Caroline99a;
43944597 = WorldStuffer;
}
but I want to have output like this.
dictionary objects {
316212228 = ajaysinghHF2;
316348693 = Caroline99a;
314125883 = Coral5mz;
271882407 = electrodealio;
14172368 = webtickle;
43944597 = WorldStuffer;
}
Thanks in advance.
keysSortedByValueUsingSelector returns a sorted array containing dictionary's keys, you have to use this returned array to retrieve the associated objects:
NSDictionary* dictionary = [NSDictionary dictionaryWithObjects:bothUserName forKeys:bothUID];
NSArray *sortedKeys = [dictionary keysSortedByValueUsingSelector:#selector(compare:)];
for (NSString *key in sortedKeys) {
NSLog(#"%#: %#", key, [dictionary objectForKey:key]);
}
I'm trying to pull two values from this Dictionary, But the values I'm getting have "()" around them. Any Ideas what is causing this?
Here is the ServerOutput:
{"Rows":[{"userid":"1","location":"beach"}]}
Dictionary after JSON:
{
Rows = (
{
location = beach;
userid = 1;
}
);
}
This is what I'm getting:
location : (
beach
)
user Id : (
1
)
Both the userid and the location key values have the "()". Here is the code. Thanks a lot.
NSString *serverOutput= [[NSString alloc] initWithData:dataURL encoding:NSUTF8StringEncoding];
if(serverOutput > 1){
SBJSON *jsonFF = [[SBJSON new] autorelease];
NSError *error3 = nil;
NSDictionary *useridDict= [jsonFF objectWithString:serverOutput error:&error3];
NSLog(#"useridDict: %#",useridDict);
idreturn = [[useridDict valueForKey:#"Rows"] valueForKey:#"userid"];
locationreturn = [[useridDict valueForKey:#"Rows"] valueForKey:#"location"];
NSLog(#" user Id : %#", idreturn);
NSLog(#" location : %#", locationreturn);
Just to clarify what is going on. When parsing JSON {} gets returned as a dictionary and [] gets retured as an array. So we have useridDict an NSDictionary containing the parsed data.
'useridDict' has one key Rows which returns an NSArray.
NSArray *useridArray = [useridDict objectForKey:#"Rows"];
Our useridArray has one element, an NSDictionary
NSDictionary *dict = [useridArray objectAtIndex:0];
This dict contains the two keys: location and userid
NSString *location = [dict objectForKey:#"location"];
NSInteger userid = [[dict objectForKey:#"userid"] intValue];
You can use like this.
idreturn = [[[useridDict valueForKey:#"Rows"] objectAtIndex:0]valueForKey:#"userid"];
locationreturn = [[[useridDict valueForKey:#"Rows"] objectAtIndex:0] valueForKey:#"location"];