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]);
}
Related
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];
}
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);
for(Attribute* attribute in appDelegate.attributeArray) {
attribute = [appDelegate.attributeArray objectAtIndex:z];
attri = attribute.zName;
int y = 0;
for(Row* r in appDelegate.elementsArray) {
r = [appDelegate.elementsArray objectAtIndex:y];
NSString *ele = r.language;
if([attri isEqualToString:ele]) {
NSLog(#"=================+++++++++++++++++%# %#",attri, r.user);
[aaa insertObject:r atIndex:y]; //here i am adding the value to array
[dict setObject:aaa forKey:attri]; //here i am adding the array to dictionary
}
y++;
}
z++;
NSLog(#"============$$$$$$$$$$$$$$$$$$$$$$$++++++++++ %#",dict);
}
key in one array and the value in the another array and the value array is in object format.
I need to store the multi object for the single key. The attributeArray has the key value and the elementsArray has the object. For example the attributeArray might have the values
" English, French, German..."
and the elementsArray might have the object value
"<Row: 0x4b29d40>, <Row: 0x4b497a0>, <Row: 0x4e38940>, <Row: 0x4b2a070>, <Row: 0x4b29ab0>, <Row: 0x4b178a0> "
In the first value I need to store the two object and for second key I need to store 3 objects and for the third key in need to store last two objects in the dictionary.
For super-simplification you can use the following code:
NSArray *keys = ...;
NSArray *values = ...;
NSMutableDictionary *dict = [NSMutableDictionary dictionaryWithObjects: values forKeys: keys];
Hope, this helps.
UPDATE:
to store multiple values for single key in the dictionary, just use NSArray / NSMutableArray as your object:
NSArray *keys = ...;
NSMutableDictionary *dict = [NSMutableDictionary dictionary];
for( id theKey in keys)
{
NSMutableArray *item = [NSMutableArray array];
[item addObject: ...];
[item addObject: ...];
...
[dict setObject: item forKey: theKey];
}
If you don't know all the values for the key from the beginning and need to add them one by one, you can use the following approach:
NSMutableDictionary *dict = [NSMutableDictionary dictionary];
for( /*some cycling condition here */)
{
id keyToUse = ...;
id valueToAdd = ...;
id foundArray = [dict objectForKey: keyToUse];
if ( nil == foundArray )
{
foundArray = [NSMutableArray array];
[dict setObject: foundArray forKey: keyToUse];
}
[foundArray addObject: valueToAdd];
}
To me it looks you are settings an array (aaa) with string (attri) as a key.
To set an array as a key for another array as an object. You can do this with the following appraoch.
NSMutableDictionary *myDictionary = [NSMutableDictionary dictionaryWithCapacity:1];
NSArray *valueArray = [NSArray arrayWithObjects:#"v1", #"v2", nil];
NSArray *keyArray = [NSArray arrayWithObjects:#"k1",#"k2", nil];
[myDictionary setObject:valueArray forKey:keyArray];
NSLog(#"myDictionary: %#", myDictionary);
But you should review your code and provide a more brief explanation that what do you want to achieve and how are you taking an approach for this.
regards,
Arslan
I have a problem.
I am using the XMLReader class to get a NSDictionary and everything works fine. But i can't to get the values of the atributes of my productData element.
Specifically, I have the following NSDictionary:
{
response = {
products = {
productsData = (
{
alias = "Product 1";
id = 01;
price = "10";
},
{
alias = "Product 2";
id = 02;
price = "20";
},
{
alias = "Product 3";
id = 03;
price = "30";
});
};
};
}
I used this code to create de NSDictionary:
NSDictionary *dictionary = [XMLReader dictionaryForXMLData:responseData error:&parseError];
and responseData contains:
<application>
<products>
<productData>
<id>01</id>
<price>10</price>
<alias>Product 1</alias>
</productData>
<productData>
<id>02</id>
<price>20</price>
<alias>Product 2</alias>
</productData>
<productData>
<id>02</id>
<price>20</price>
<alias>Product 3</alias>
</productData>
</products>
</application>
Then, i don't know how get the values of each productData like id, price and alias...
Anybody know how to do it??
Thanks and please forgive my bad english !
NSArray* keys = [theDict allKeys];
for(NSString* key in keys) {
id obj = [theDict objectForKey:key];
// do what needed with obj
}
you could try something like this :
NSArray* keys = [theDict allKeys];
for(NSString* key in keys) {
if ([key isEqualToString:#"product"]) {
NSArray* arr = [theDict objectForKey:key];
// do what needed with arr
}
}
There is a method on NSDictionary - -allValueswhich returns a new array containing the dictionary’s values. Maybe that will help.
Starting with
NSDictionary *dictionary = [XMLReader dictionaryForXMLData:responseData error:&parseError];
you can do something like this:
NSDictionary *application = [dictionary objectForKey:#"application"];
if ([[application objectForKey:#"products"] isKindOfClass [NSArray class]]) {
NSArray *products = [application objectForKey:#"products"];
for (NSDictionary *aProduct in products) {
// do something with the contents of the aProduct dictionary
}
else if {[[application objectForKey:#"products"] isKindOfClass [NSDictionary class]]) {
// you will have to see what the returned results look like if there is only one product
// that is not in an array, but something along these lines may be necessary
// to get to a single product dictionary that is returned
}
I have had a case similar to this (parsing JSON) where an array was not returned for a signle value, so the result had to be checked for both an array (of product dictionaries in your case) or a single NSDictionary (the product dictionary in your case).
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);
}
}