I've created NSDictionary of sorted arrays by name organized by first letter (see results below). When I use the command allKeys for that same Dictionary, the order is not the same. I need the order the same because this NSDictionary is used in UITableview and should be alphabetical.
- (NSDictionary*) dictionaryNames {
NSDictionary *dictionary;
NSMutableArray *objects = [[NSMutableArray alloc] init];
NSArray *letters = self.exhibitorFirstLetter;
NSArray *names = self.exhibitorName;
for (NSInteger i = 0; i < [self.exhibitorFirstLetter count]; i++)
{
[objects addObject:[[NSMutableArray alloc] init]];
}
dictionary = [[NSDictionary alloc] initWithObjects: objects forKeys:letters];
for (NSString *name in names) {
NSString *firstLetter = [name substringToIndex:1];
for (NSString *letter in letters) { //z, b
if ([firstLetter isEqualToString:letter]) {
NSMutableArray *currentObjects = [dictionary objectForKey:letter];
[currentObjects addObject:name];
}
}
}
NSLog(#"%#", dictionary);
NSLog(#"%#", [dictionary allKeys]);
return dictionary;
}
B = (
"Baker's Drilling",
"Brown Drilling"
);
C = (
"Casper Drilling"
);
J = (
"J's, LLC"
);
N = (
"Nelson Cleaning",
"North's Drilling"
);
T = (
"Tim's Trucks"
);
Z = (
"Zach's Main",
"Zeb's Service",
"Zen's"
);
}
J,
T,
B,
N,
Z,
C
)
NSDictionary is not an ordered collection. There's no way to control how it orders things, and it may change completely depending on OS version, device type, and dictionary contents.
I just put the NSDictionary in sorted array:
- (NSArray*)sortAllKeys:(NSArray*)passedArray{
NSArray* performSortOnKeys = [passedArray sortedArrayUsingSelector:#selector(localizedCaseInsensitiveCompare:)];
return performSortOnKeys;
}
Related
NSArray*arr = #[#"ram",#"Ram",#"vinoth",#"kiran",#"kiran"];
NSSet* uniqueName = [[NSSet alloc]initWithArray:arr];
NSLog(#"Unique Names :%#",uniqueName);
Output:
but i need the output as
You could first convert them all to lowercase strings.
NSArray *arr = #[#"ram",#"Ram",#"vinoth",#"kiran",#"kiran"];
NSArray *lowerCaseArr = [arr valueForKey:#"lowercaseString"];
NSSet* uniqueName = [[NSSet alloc] initWithArray:lowerCaseArr];
NSLog(#"Unique Names :%#",uniqueName);
Unique Names :{(
ram,
kiran,
vinoth
)}
Try this:
NSArray *arr = [NSArray arrayWithObjects:#"Ram",#"ram", nil]; //this is your array
NSMutableArray *arr1 = [[NSMutableArray alloc]init]; //make a nsmutableArray
for (int i = 0; i<[arr count]; i++) {
[arr1 addObject:[[arr objectAtIndex:i]lowercaseString]];
}
NSSet *set = [NSSet setWithArray:(NSArray*)arr1];//this set has unique values
This will always preserve casing form that was existing in your original container (although it's undefined which casing):
NSArray<NSString*>* input = ...
NSMutableDictionary* tmp = [[NSMutableDictionary alloc] init];
for (NSString* s in input) {
[tmp setObject:s forKey:[s lowercaseString]];
}
return [tmp allValues];
Create a mutable array the same size as arr. Fill it with lowercaseString versions of each element of arr. Make the set out of that.
#Updated
Using this you remove uppercase string from your array.
NSMutableArray *arr= [[NSMutableArray alloc]initWithObjects:#"ram",#"Ram",#"vinoth",#"kiran", nil];
NSMutableArray *arrCopy = [[NSMutableArray alloc]init];
for (int index = 0 ; index<arr.count; index++) {
NSUInteger count = [[[[arr objectAtIndex:index] componentsSeparatedByCharactersInSet:[[NSCharacterSet uppercaseLetterCharacterSet] invertedSet]] componentsJoinedByString:#""] length];
if (count == 0) {
[arrCopy addObject:[arr objectAtIndex:index]];
}
}
NSLog(#"Print Mutable Copy %#",arrCopy);
try this one
NSArray *copyArray = [mainArray copy];
NSInteger index = [copyArray count] - 1;
for (id object in [copyArray reverseObjectEnumerator]) {
if ([mainArray indexOfObject:object inRange:NSMakeRange(0, index)] != NSNotFound) {
[mainArray removeObjectAtIndex:index];
}
index--;
}
copyArray=nil;
I have a UITableView with custom cellView populated with an array (cf. functs) without section. My goal is to create a search bar (which is ok) with a list index (which is the problem).
After reading a lot of documentations, I plan to use these three methods: "numberOfSectionsInTableView", "sectionIndexTitlesForTableView" and "sectionForSectionIndexTitle"
How to create the NSDictionnary of functs array with the following structure?
//in viewDidLoad
// Initialize the functs array
Funct *funct1 = [Funct new];
funct1.name = #"AAA";
funct1.detail = #"detail1...";
funct1.image = #"a.jpg";
Funct *funct2 = [Funct new];
funct2.name = #"BBB";
funct2.prepTime = #"detail2...";
funct2.image = #"b.jpg";
functs = [NSArray arrayWithObjects:funct, funct2, nil]; //etc.
//For Index list: one section per letter
NSString *letters = #"a b c d e f g h i j k l m n o p q r s t u v w x y z";
self.indexTitlesArray = [letters componentsSeparatedByString:#" "];
Thanks in advance
Here you have a good tutorial with example project. It´s what you are looking for.
It´s an example for TableView indexed, but it has a good example for sections and rows
There is in this example this method very useful for you
static NSString *letters = #"abcdefghijklmnopqrstuvwxyz";
// This method returns an array of dictionaries where each key is a letter
// and each value is a group of words corresponding to the letter.
+ (NSArray *) wordsFromLetters {
NSMutableArray *content = [NSMutableArray new];
for (int i = 0; i < [letters length]; i++ ) {
NSMutableDictionary *row = [[[NSMutableDictionary alloc] init] autorelease];
char currentWord[WORD_LENGTH + 1];
NSMutableArray *words = [[[NSMutableArray alloc] init] autorelease];
for (int j = 0; j < WORD_LENGTH; j++ ) {
if (j == 0) {
currentWord[j] = toupper([letters characterAtIndex:i]);
}
else {
currentWord[j] = [letters characterAtIndex:i];
}
currentWord[j+1] = '\0';
[words addObject:[NSString stringWithCString:currentWord encoding:NSASCIIStringEncoding]];
}
char currentLetter[2] = { toupper([letters characterAtIndex:i]), '\0'};
[row setValue:[NSString stringWithCString:currentLetter encoding:NSASCIIStringEncoding]
forKey:#"headerTitle"];
[row setValue:words forKey:#"rowValues"];
[content addObject:row];
}
return content;
}
You can take the main idea from this resource, but if you prefer, I adapted the code. I think works fine
NSMutableArray *funcsArray = [NSMutableArray array];//Here you add all your functs objects
[funcsArray addObjects: funct1, funct2...];
NSSortDescriptor *sortDescriptor;
sortDescriptor = [[[NSSortDescriptor alloc] initWithKey:#"name"
ascending:YES selector:#selector(localizedCaseInsensitiveCompare:)] autorelease];
NSArray *sortDescriptors = [NSArray arrayWithObject:sortDescriptor];
NSArray *sortedArray;
sortedArray = [funcsArray sortedArrayUsingDescriptors:sortDescriptors];
NSMutableArray *funcsArrayOrdered = [NSMutableArray array];//Here you add all your functs objects
NSMutableArray *funcsIndexed = [NSMutableArray array];
NSMutableArray *letters = [NSMutableArray array];
NSString *currentLetter = nil;
int numItems = [funcsArrayOrdered count];
for (Funct *functObj in funcsArrayOrdered) {
NSLog(#"funct: %#", functObj.name);
numItems--;
NSString *string = userT.name;
if (string.length > 0) {
NSString *letter = [[string substringToIndex:1] uppercaseString];
if ([currentLetter length] == 0) {
currentLetter = letter;
}
if (![letter isEqualToString:currentLetter] || numItems == 0) {
if ([letter isEqualToString:currentLetter] && numItems == 0) {
[letters addObject:functObj];
NSMutableDictionary *dic = [NSMutableDictionary dictionary];
[dic setValue:currentLetter forKey:#"headerTitle"];
[dic setValue:letters forKey:#"rowValues"];
[funcsIndexed addObject:dic];
letters = [NSMutableArray array];
}else{
NSMutableDictionary *dic = [NSMutableDictionary dictionary];
[dic setValue:currentLetter forKey:#"headerTitle"];
[dic setValue:letters forKey:#"rowValues"];
[funcsIndexed addObject:dic];
letters = [NSMutableArray array];
[letters addObject:functObj];
currentLetter = letter;
if (numItems == 0 && [funcsArrayOrdered count] > 1) {
NSMutableDictionary *dic = [NSMutableDictionary dictionary];
[dic setValue:currentLetter forKey:#"headerTitle"];
[dic setValue:letters forKey:#"rowValues"];
[funcsIndexed addObject:dic];
}
}
}else {
[letters addObject:functObj];
}
}
}
Now you will have your array of Dictionaries ordered in funcsIndexed
I have an NSArray some thing like in the following format.
The group array is :
(
"Q-1-A1",
"Q-1-A9",
"Q-2-A1",
"Q-2-A5",
"Q-3-A1",
"Q-3-A8",
"Q-4-A1",
"Q-4-A4",
"Q-10-A2",
"Q-8-A2",
"Q-9-A2",
"Q-7-A1",
"Q-5-A2"
)
Now what i have to do is group the array elements some thing like this.
1 = ( "Q-1-A1","Q-1-A9")
2 = ("Q-2-A1","Q-2-A5",) ...
10 =("Q-10-A2")
can any one please help me how can i achieve this.
Thanks in advance.
Try
NSArray *array = #[#"Q-1-A1",
#"Q-1-A9",
#"Q-2-A1",
#"Q-2-A5",
#"Q-3-A1",
#"Q-3-A8",
#"Q-4-A1",
#"Q-4-A4",
#"Q-10-A2",
#"Q-8-A2",
#"Q-9-A2",
#"Q-7-A1",
#"Q-5-A2"];
NSMutableDictionary *dictionary = [NSMutableDictionary dictionary];
for (NSString *string in array) {
NSArray *components = [string componentsSeparatedByString:#"-"];
NSString *key = components[1];
NSMutableArray *tempArray = dictionary[key];
if (!tempArray) {
tempArray = [NSMutableArray array];
}
[tempArray addObject:string];
dictionary[key] = tempArray;
}
Create an NSMutableDictionary, then iterate through your 'group array'.
For each NSString object:
get the NSArray of componentsSeparatedByString:#"-"
use the second component to create a key and retrieve the object for that key from your mutable dictionary. If its nil then set it to an empty NSMutableArray.
add the original NSString to the mutable array.
Try this
NSArray *arrData =[[NSArray alloc]initWithObjects:#"Q-1-A1",#"Q-1-A9",#"Q-2-A1",#"Q-2-A5",#"Q-3-A1",#"Q-3-A8",#"Q-4-A1",#"Q-4-A4",#"Q-10-A2",#"Q-8-A2",#"Q-9-A2",#"Q-7-A1",#"Q-5-A2", nil ];
NSMutableDictionary *dictList = [[NSMutableDictionary alloc]init];
for (int i=0; i<[arrData count];i++) {
NSArray *arrItem = [[arrData objectAtIndex:i] componentsSeparatedByString:#"-"];
NSMutableArray *arrSplitedItems = [dictList valueForKey:[arrItem objectAtIndex:1]];
if (!arrSplitedItems) {
arrSplitedItems = [NSMutableArray array];
}
[arrSplitedItems addObject:[arrData objectAtIndex:i]];
[dictList setValue:arrSplitedItems forKey:[arrItem objectAtIndex:1]];
}
NSArray *sortedKeys =[dictList allKeys];
NSArray *sortedArray = [sortedKeys sortedArrayUsingComparator:^(id str1, id str2) {
return [((NSString *)str1) compare:((NSString *)str2) options:NSNumericSearch];
}];
for (int i=0; i<[sortedArray count]; i++) {
NSLog(#"%#",[dictList objectForKey:[sortedArray objectAtIndex:i]]);
}
listOfYourMainArray/// Its YOur main Array;
temArray = (NSArray *)listOfYourMainArray; // Add Your main array to `temArray`.
NSMutableDictionary *lastDic = [[NSMutableDictionary alloc] init]; /// YOu need to creat Dictionary for arrange your values.
for (int i = 0; i< listOfYourMainArray.count; i++)
{
for (int j = 0 ; j < temArray.count; j ++)
{
if (([[temArray objectAtIndex:j] rangeOfString:[NSString stringWithFormat:#"Q-%d", i] options:NSCaseInsensitiveSearch].location != NSNotFound))
{
[lastDic setValue:[temArray objectAtIndex:j] forKey:[NSString stringWithFormat:#"%d", i]];
}
}
}
NSLog(#"%#", lastDic)
I have one NSMutableArray *arr1 with values:
{(B,abc) (E,pqr) (C,xyz)}
and another NSMutableArray *arr2 with
{(B) (C) (E)}.
Now i want to sort arr1 using arr2 value so that arr1 becomes {(B,abc) (C,xyz) (E,pqr)}. How can i do this?
So, it seems you have an array and an array of arrays:
NSArray *sorter = #[#"B", #"C", #"E"];
NSMutableArray *sortee = [#[
#[#"B", #"abc"],
#[#"E", #"pqr"],
#[#"C", #"xyz"]
] mutableCopy];
[sortee sortUsingComparator:^(id o1, id o2) {
NSString *s1 = [o1 objectAtIndex:0];
NSString *s2 = [o2 objectAtIndex:0];
NSInteger idx1 = [sorter indexOfObject:s1];
NSInteger idx2 = [sorter indexOfObject:s2];
return idx1 - idx2;
}];
Try this,
NSMutableArray *unsortedArray = [NSMutableArray arrayWithObjects:[NSArray arrayWithObjects:#"B",#"abc", nil],[NSArray arrayWithObjects:#"E",#"pqr", nil],[NSArray arrayWithObjects:#"C",#"xyz", nil],nil];
NSArray *guideArray = [NSArray arrayWithObjects:#"B",#"C",#"E", nil];
for(int i=0; i< [guideArray count];i++)
{
for(int j=0; j< [unsortedArray count];j++)
{
if([[unsortedArray objectAtIndex:j] containsObject:[guideArray objectAtIndex:i]])
{
[unsortedArray exchangeObjectAtIndex:j withObjectAtIndex:i];
break;
}
}
}
NSLog(#"%#",unsortedArray);
I have tested this and working for me. Hope this helps you.
I have a sorted array of NSString values, I would like to know how to capture the first letter of each string only when the first letter is different and put it in a new NSArray.
For instance if I have an array that was like like
"a, aaa, aaaa, b, c, d, dd, ddd"
it would be like this in the new NSArray
"a, b, c, d"
Any help would be greatly appreciated.
Something like this:
- (NSArray *)indexLettersForStrings:(NSArray *)strings {
NSMutableArray *letters = [NSMutableArray array];
NSString *currentLetter = nil;
for (NSString *string in strings) {
if (string.length > 0) {
NSString *letter = [string substringToIndex:1];
if (![letter isEqualToString:currentLetter]) {
[letters addObject:letter];
currentLetter = letter;
}
}
}
return [NSArray arrayWithArray:letters];
}
NSString+LetterIndex.h
#interface NSString (LetterIndex)
#property (nonatomic, readonly) NSString * firstLetter;
#end
NSString+LetterIndex.m
#implementation NSString (LetterIndex)
- (NSString *)firstLetter
{
return self.length ? [self substringToIndex:1] : #"";
}
your method:
- (NSArray *)indexLettersForStrings:(NSArray *)strings {
NSSet * distinctValues = [NSSet setWithArray:[strings valueForKey:#"firstLetter"]];
return [[distinctValues allObjects] sortedArrayUsingSelector:#selector(compare:)]
}
also if you have some objects of custom class and want to group them by first letters of some string parameter, you can use this:
NSSet * distinctValues = [NSSet setWithArray:[objects valueForKeyPath:#"myStringParam.firstLetter"]];
NSArray *array = [NSArray arrayWithObjects:#"a", #"aaa", #"aaaa",#"b", #"c", #"d", #"dd", #"ddd", nil];
BOOL control = YES;
NSMutableArray *array2 = [NSMutableArray array];
for (int i = 0; i<array.count; i++) {
for (int j = 0; j<array2.count;j++){
if ([[array2 objectAtIndex:j]isEqualToString:[[array objectAtIndex:i]substringToIndex:1]]){
control = NO;
}
else
control = YES;
}
if (control)
[array2 addObject:[[array objectAtIndex:i]substringToIndex:1]];
}
Try this:
NSArray *arr = #[#"a", #"aaa", #"aaaa", #"b", #"c", #"d", #"dd", #"ddd"];
NSMutableArray *newArr = [NSMutableArray array];
NSMutableSet *set = [NSMutableSet set];
for (NSString *str in arr)
{
if (![set containsObject:[str substringToIndex:1]])
[newArr addObject:[str substringToIndex:1]];
[set addObject:[str substringToIndex:1]];
}
NSLog(#"%#", newArr);
This uses a Set to keep track of occurrences that already past threw. When it doesnt exist it places them into a new array.