Hi i have two nsarrays.
Array A:
arrProductSelection = [[NSArray alloc]initWithObjects:#"English",#"German",#"Russian",#"Chinese",#"Spanish",#"French",#"French",#"French",#"French",#"French",#"French",#"French",#"French",nil];
Array B:
arrProductSelectionB = [[NSArray alloc]initWithObjects:#"deselcted",#"selected",#"selected",#"selected",#"deselcted",#"deselcted",#"deselcted",#"deselcted",#"deselcted",#"deselcted",#"deselcted",#"deselcted",#"deselcted",nil];
I need to compare two arrays and get the value from array A by comparing with array B having value as selected. That is i should get german,chinese and russian sepearted by comma as nsstring.
Try this:
NSMutableArray *arrSelected = [[NSMutableArray alloc] init];
NSArray *arrProductSelection = [[NSArray alloc]initWithObjects:#"English",#"German",#"Russian",#"Chinese",#"Spanish",#"French",#"French",#"French",#"French",#"French",#"French",#"French",#"French",nil];
NSArray *arrProductSelectionB = [[NSArray alloc]initWithObjects:#"deselcted",#"selected",#"selected",#"selected",#"deselcted",#"deselcted",#"deselcted",#"deselcted",#"deselcted",#"deselcted",#"deselcted",#"deselcted",#"deselcted",nil];
for(int i = 0; i< arrProductSelectionB.count-1;i ++) {
if ([arrProductSelectionB[i] isEqualToString:#"selected"]) {
[arrSelected addObject:arrProductSelection[i]];
}
}
NSString *strSelected = [arrSelected componentsJoinedByString:#","];
NSLog(#"%#", strSelected);//output: German,Russian,Chinese
If you can make this type of array then manage easly.
(
{
flag = deselcted;
name = English;
},
{
flag = selected;
name = German;
},
{
flag = deselcted;
name = Russian;
},
{
flag = deselcted;
name = Chinese;
}
)
==> Array[(dictionary),(dictionary),.....]
if you need result in an array, Here is the function:
NSMutableArray*resultArray=[[NSMutableArray alloc]init];
for(int i=0; i<arrProductSelectionB.count;i++){
if ([[arrProductSelectionB objectAtIndex:i]isEqualToString:#"selected"]) {
[resultArray addObject:[arrProductSelection objectAtIndex:i]];
}
}
resultArrayhave the values which you need.
first i would make sure both arrays have same counters for safety something like
if (arrProductSelection.count == arrProductSelectionB) {
//than all you need is one for cycle something like :
for (int i = 0; i < arrProductionSelectionB.count; i++) {
if ([arrProductionSelectionB[i] isEqualToString: #"selected"]) {
do something magically with arrProductSelection[i];
}
}
}
I want to store all the emails into an array. What do I need to do for the same ?
Use this code and change it according to your requirement
NSMutableDictionery * repsonseDict = [[NSMutableDictionery alloc]init];
repsonseDict = [reponseObj objectForKey#"response"];
NSArray * allKeys = [repsonseDict allKeys];
NSMutableArray * emailArr = [[NSMutableArray alloc]init];
for(int i = 0; i < [allKeys count]; i ++ ){
NSString * numberKey = [NSString stringWithFormat:#"%d",i];
[emailArr addObject:[[repsonseDict objectForKey:numberKey]objectForKey:#"email"]];
}
I am trying to copy a specific values at specific index from one array to another like this:
for (int i = 0; i < 100; i++) {
if ([subID[i] isEqual: #"0"]) {
NSLog(#"state : %#",arrayTempState[i]);
NSString *str = arrayTempState[i];
[arrayState addObject:str];
NSLog(#"%#",arrayState[i]);
}
arrayState is NSMutableArray and arrayTempState is NSArray
but arrayState is null every time.
I tried arrayState[i] = arrayTempState[i]; but it did not work.
arrayState was not initialised that is why it couldn't store the value.
plz try this
arrayState = [NSMutableArray array];
for (int i = 0; i < 100; i++) {
if ([subID[i] isEqual: #"0"]) {
NSLog(#"state : %#",arrayTempState[i]);
NSString *str = arrayTempState[i];
[arrayState addObject:str];
NSLog(#"%#",arrayState[i]);
}
This question already has answers here:
NSDictionary with ordered keys
(9 answers)
Closed 8 years ago.
I saw many examples on SO but I'm not sure if it applies to this situation. Everywhere it says NSMutableDictionries are not guaranteed an order...but I'm getting my data from the server...so my NSMuteDic looks like this:
{
joe = (
{
fromName = joe;
id = 25;
theMessage = "this is going to be a really big message...";
timeAdded = "2014-04-07 21:08:12";
toName = "me";
},
{
fromName = joe;
id = 10;
theMessage = "why???";
timeAdded = "2014-04-05 20:10:04";
toName = "me";
}
);
bob = (
{
fromName = "me";
id = 24;
theMessage = "blah blah";
timeAdded = "2014-04-06 21:15:06";
toName = bob;
},
{
fromName = bob;
id = 22;
theMessage = message;
timeAdded = "2014-04-06 20:11:57";
toName = "me";
}
);
//more entries here
}
What I want to do is change the order...put bob first and joe second. Is this really impossible to do? I saw many very complex solutions...there's no easy way to do this with just a for loop?
cellForRowAtIndexPath:
NSMutableArray *temp = [myDict objectForKey:keys[indexPath.row]];
cell.Message.text = [[reverse lastObject] valueForKey:#"theMessage"];
cell.dateTime.text = [[reverse lastObject] valueForKey:#"timeAdded"];
return cell;
This is how I'm using it...and when a row is selected I pass the array to the next view controller. The reason why I want to reorder is if a new message will be inserted in the pushed view controller, I want that dictionary to be first in the list so the root view controller can be reordered.
NSArray *keys = [myDict allKeys];
[myDict removeObjectForKey:to];
NSMutableDictionary *temp = [NSMutableDictionary dictionaryWithCapacity:[myDict.count];
temp = myDict;
[myDict removeAllObjects];
[myDict setObject:currentDict forKey:to];
for (int i=0; i<temp.count; i++) {
[myDict setObject:[temp valueForKey:keys[i]] forKey:keys[i]];
}
That's not working because it looks like since myDict is a NSObject, temp gets changed every time myDict changes...from the looks of it the logic should work but it isn't...
NSMutableDictionary is not ordered. There is nothing you can do to guarantee the order of keys because NSDictionary makes no attempt to preserve any particular ordering. To go over a dictionary in a particular order, you have to make an array of the keys that is in the order you want, then iterate that and fetch the corresponding values.
// Get the keys
NSArray *keys = [myDict allKeys];
// Sort the keys
NSArray *sortedArray = [NSArray arrayWithArray:[keys sortedArrayUsingComparator:^(NSString* a, NSString* b) {
return [a compare:b];
}]];
// Iterate the dictionary
for (NSUInteger n = 0 ; < [sortedArray count]; n++) {
id value = [myDict objectForKey:[sortedArray objectAtIndex:n]];
}
I'm stumpped on how iterate and get values for an Array of Arrays of NSDictionaries (different classes/entities). Here's what I'm currently doing:
1) Constructing two separate arrays of NSDictionaries (different entities)
2) Combining both arrays with:
NSMutableArray *combinedArrayofDicts = [[NSMutableArray alloc] initWithObjects: sizesArrayOfDicts, wishListArrayOfDicts , nil];
3) Then archive combinedArrayofDicts :
NSData *dataToSend = [NSKeyedArchiver archivedDataWithRootObject:combinedArrayofDicts];
4) Transmit over GameKit
[self.session sendDataToAllPiers:dataToSend withDataMode: GKSendDataReliable error:nil];
5) How would I manage traversing thru this array on the receiving end? I want to fetch values by for each class which is key'ed by classname:
Here's how it looks via NSLog (2 Sizes Dicts, and 1 Wishlist Dict)
Printing description of receivedArray:
<__NSArrayM 0xbc65eb0>(
<__NSArrayM 0xbc651f0>(
{
classname = Sizes;
displayOrder = 0;
share = 1;
sizeType = Neck;
value = "13\" or 33 (cm)";
},
{
classname = Sizes;
displayOrder = 0;
share = 1;
sizeType = Sleeve;
value = "34\" or 86 (cm)";
}
)
,
<__NSArrayM 0xbc65e80>(
{
classname = Wishlist;
detail = "";
displayOrder = 0;
imageString = "";
latitude = "30.33216666666667";
link = "http://maps.google.com/maps?q=loc:30.332,-81.41";
longitude = "-81.40949999999999";
name = bass;
share = 1;
store = "";
}
)
)
(lldb)
In my for loop I'm issuing this:
NSString *value = [dict objectForKey:#"classname"];
and get an exception:
* Terminating app due to uncaught exception 'NSInvalidArgumentException', reason: '-[__NSArrayM objectForKey:]:
unrecognized selector sent to instance 0xbc651f0'
Is this frowned upon as far as mixing object types in arrays of arrays?
#Will guided me to the answer with the right construct.. Here's the final answer:
NSArray *receivedArray;
if(receivedArray.count>0){
NSArray *combinedArrayofDicts = [receivedArray objectAtIndex:0];
if(combinedArrayofDicts.count>=2){
NSArray *sizesArray = [receivedArray objectAtIndex:0]; // Reference original received array
for(NSDictionary *sizeDict in sizesArray){
NSLog(#"%#",sizeDict);
}
NSArray *wishListArray = [receivedArray objectAtIndex:1]; // Reference original received array
for(NSDictionary *wishDict in wishListArray){
NSLog(#"%#",wishDict);
}
}
}
for fetching the required dictionaries use the following code,
Assume receivedArray as the array receive from Game center
NSArray *receivedArray;
if(receivedArray.count>0){
NSArray *combinedArrayofDicts = [receivedArray objectAtIndex:0];
if(combinedArrayofDicts.count>=2){
NSArray *sizesArray = [combinedArrayofDicts objectAtIndex:0];
for(NSDictionary *sizeDict in sizesArray){
NSLog(#"%#",sizeDict);
}
NSArray *wishListArray = [combinedArrayofDicts objectAtIndex:1];
for(NSDictionary *wishDict in wishListArray){
NSLog(#"%#",wishDict);
}
}
}
how iterate and get values for an Array of Arrays of NSDictionaries
As you said you have array of array of dictionaries, your current code will not retrive value of class name.
Your return values are in NSArray not in NSDictionary
So you need to do something like,
NSString *value = [returnArray[0][0] objectForKey:#"classname"];
You can iterate and get values like,
for (int i = 0; i < [returnArray count]; i++) {
for (int j = 0; j < [returnArray[i] count]; j++) {
NSDictionary *dict = (NSDictionary*)returnArray[i][j];
NSLog(#"%# ...",[dict objectForKey:#"classname"]);
}
}
Perhaps you can try:
NSString *value = [NSString stringWithFormat:#"%#",[dict objectForKey:#"classname"]];
By the looks of your output, I don't think "Sizes" is a string.