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Fill NSMutableArray in a for loop [duplicate]
(1 answer)
Closed 8 years ago.
How I can replace elements?
I try like this, but it does not work
NSMutableArray* marray = [[NSMutableArray alloc] initWithObjects:#"1", #"2", #"3", nil];
for (int i = 0; [marray count]; i++) {
NSInteger curentVal = [[marray objectAtIndex:i] intValue];
curentVal += 5;
[marray replaceObjectAtIndex:i withObject:curentVal];
}
You need to convert curentVal back to an object, in this case a NSString.
There is also a typeo in the for statement.
NSMutableArray* marray = [[NSMutableArray alloc] initWithObjects:#"1", #"2", #"3", nil];
NSLog(#"marray: %#", marray);
for (NSInteger i = 0; i<[marray count]; i++) {
NSInteger curentVal = [[marray objectAtIndex:i] intValue];
curentVal += 5;
NSString *curentValString = [NSString stringWithFormat:#"%ld", (long)curentVal];
[marray replaceObjectAtIndex:i withObject: curentValString];
}
NSLog(#"marray: %#", marray);
Output:
marray: (
1,
2,
3
)
marray: (
6,
7,
8
)
Here is the same approach with NSNumbers:
NSMutableArray* marray = [[NSMutableArray alloc] initWithObjects:#1, #2, #3, nil];
for (NSInteger i = 0; i<[marray count]; i++) {
NSInteger curentVal = [[marray objectAtIndex:i] intValue];
curentVal += 5;
[marray replaceObjectAtIndex:i withObject:#(curentVal)];
}
curentVal is not an object. You should put:
[marray replaceObjectAtIndex:i withObject:#(curentVal)];
so curentVal is converted to an NSNumber
Also you probably want to deal with numbers, so put:
NSMutableArray* marray = [[NSMutableArray alloc] initWithObjects:#1, #2, #3, nil];
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 would like to create an array for iOS platform like the PHP syntax below, many thanks ~~
$createArray = array ();
for ($i = 0; $i<10; $i++) {
$createArray[$i]['name'] = $name;
$createArray[$i]['age'] = $age;
}
Save your values in NSDictionary and add that dictionary into your array
NSMutableArray *theArray = [NSMutableArray array];
for (int indexValue = 0; indexValue<10; indexValue++) {
NSMutableDictionary *theDictionary = [[NSMutableDictionary alloc] init];
[theDictionary setObject:name forKey:#"name"];
[theDictionary setObject:age forKey:#"age"];
[theArray addObject:theDictionary]
}
While Retrieving time,
NSString *name = [[theArray objectAtIndex:indexValue] objectForKey:#"name"];
NSString *age = [[theArray objectAtIndex:indexValue] objectForKey:#"age"];
you might find it helpful:
array = [[NSMutableArray alloc] init];
for (int i = 0; i < 8; i++) {
NSMutableArray *subArray = [[NSMutableArray alloc] init];
for (int j = 0; j < 8; j++) {
[subArray addObject:[NSNumber numberWithInt:0]];
}
[array addObject:subArray];
[subArray release];
}
also check this question
Try this.
array = [[NSMutableArray alloc] init];
for (int i = 0; i < 10; i++) {
NSMutableArray *subArray = [[NSMutableArray alloc] init];
for (int j = 0; j < 2; j++) {
//Do your Stuff
// [subArray addObject:name];
// [subArray addObject:Age];
}
[array addObject:subArray];
}
OR
Why can't try with the NSDictionary
You can use this. But this is not better way in IOS.
NSMutableArray *array[20];
for (int i=0;i< 20; i++)
{
array[i] = [NSMutableArray array];
for (int j=0;j<3;j++)
{
NSMutableDictionary *theDictionary = [[NSMutableDictionary alloc] init];
[theDictionary setObject:name forKey:#"name"];
[theDictionary setObject:age forKey:#"age"];
[[array[i] addObject:theDictionary]
}
}
First you to have set An NSMutableDictionary on .h file
#interface MSRCommonLogic : NSObject
{
NSMutableDictionary *twoDimensionArray;
}
then have to use following functions in .m file
- (void)setValuesToArray :(int)rows cols:(int) col value:(id)value
{
if(!twoDimensionArray)
{
twoDimensionArray =[[NSMutableDictionary alloc]init];
}
NSString *strKey=[NSString stringWithFormat:#"%dVs%d",rows,col];
[twoDimensionArray setObject:value forKey:strKey];
}
- (id)getValueFromArray :(int)rows cols:(int) col
{
NSString *strKey=[NSString stringWithFormat:#"%dVs%d",rows,col];
return [twoDimensionArray valueForKey:strKey];
}
I want to compare 2 NSMutableArray and get different object into third Array. How can i do that ?
Array1 can loop object .
Array1 = "a", "b","c","d","a","b","c";
Array2 = "a", "b", "c";
And then result
Array3 = "d";
Thanks in advance
Use sets for set operations:
NSSet *set1 = [NSSet setWithArray:array1];
NSMutableSet *set2 = [NSMutableSet setWithArray:array2];
[set2 minusSet:set1];
You Can try this too.
NSMutableArray *array1 = [[NSMutableArray alloc]initWithObjects:#"1",#"2",#"3",#"1", nil];
NSMutableArray *array2 = [[NSMutableArray alloc]initWithObjects:#"2",#"1", nil];
NSMutableArray *largeArray;
NSMutableArray *shortArray;
if([array1 count] > [array2 count]){
largeArray = array1;
shortArray = array2;
} else {
largeArray = array2;
shortArray = array1;
}
[largeArray removeObjectsInArray:shortArray];
for (NSString *va in largeArray) {
NSLog(#"%#",va);
}
NSMutableArray *gotDiffArry= [[NSMutableArray alloc] init];
for(int i = 0 ; i < FirstArray.count; i++) {
if(i < seconArray.count){
if(![seconArray[i] isEqual:firstArray[i]]){
[gotDiffArry addObject:[NSNumber numberWithInt:i]];
}
} else {
[gotDiffArry addObject:[NSNumber numberWithInt:i]];
}
}
EDITED:
for (int i = 0 ; i < firstArray.count ; i ++)
{
NSString *search = [firstArray objectAtIndex:i];
NSPredicate *predicate = [NSPredicate predicateWithFormat:#"ANY SELF CONTAINS %#", search];
NSMutableArray *temAraay = [secondArray filteredArrayUsingPredicate: predicate];
if(temArray.count >=0 )
{
NSLog("%#", [temArray objectAtIndex:0]);
}
}
I have used the following and got the desired results:
for(int i =0; i<[arraytwo count]; i++)
{
if (![arrayone containsObject:[arraytwo objectAtIndex:i]])
[arraythree addObject: [arraytwo obectAtIndex:i]];
}
NSLog(#"%#",arraythree);
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.