Why print works after relasing nsstring
NSString * newname = [[NSString alloc] init];
newname = #"aaaa";
[newname release];
printf("%s", newname.UTF8String);
Related
I am trying to write main array in a file and this main array contain sub array . Now whenever I write main array the sub array get overwritten .
Below is my code.
#import <Foundation/Foundation.h>
int main(int argc, const char * argv[]) {
#autoreleasepool {
char fname[10];
printf("Type your first name:\n");
scanf("%s",fname);
NSString *firstname = [[NSString alloc] init];
firstname = [NSString stringWithUTF8String:fname];
char lname[10];
printf("Type your last name:\n");
scanf("%s",lname);
NSString *lastname = [[NSString alloc] init];
lastname = [NSString stringWithUTF8String:lname];
long mnumber = 0;
printf("Enter your register mobile number:\n");
scanf("%ld",&mnumber);
NSNumber *mobilenumber = [NSNumber numberWithLong:mnumber];
long anumber = 0;
printf("Enter your account number:\n");
scanf("%ld",&anumber);
NSNumber *accountnumber = [NSNumber numberWithLong:anumber];
NSURL *docdir = [[NSFileManager defaultManager] URLForDirectory:NSDesktopDirectory inDomain:NSUserDomainMask appropriateForURL:nil create:NO error:nil];
NSURL *filepath = [docdir URLByAppendingPathComponent:#"Dexter_apps/filetesting/data.plist"];
NSArray *data = #[firstname,lastname,mobilenumber,accountnumber];
NSMutableArray *mainarray = [[NSMutableArray alloc]init];
mainarray = #[data];
[mainarray writeToURL:filepath atomically:NO];
}
return 0;
}
How to get the date and title and description alone from this parsing result:
title = "Inter-views 29/03/2017 random description here (its in arabic);
title = " \U0627\U062e\U0628\U0627\U0631 \U0627\U0644\U0635\U0628\U0627\U062d 14/04/2017";
That's the parsing from same api but different (didSelectRowAtIndexPath).
I'm currently using this code but as I notified the parsing is different. So I cannot use static logic.
Code:
NSString *myString = [item objectForKey:#"title"];
NSMutableArray *myArray = [[NSMutableArray alloc]
initWithArray:[myString componentsSeparatedByCharactersInSet:
[NSCharacterSet characterSetWithCharactersInString:#" "]]];
NSString *Category = #"";
if(myArray.count>=1){
Category = [myArray objectAtIndex:0];
[myArray removeObjectAtIndex:0];
}
NSString *Date = #"";
if(myArray.count>=1) {
Date = [myArray objectAtIndex:0];
[myArray removeObjectAtIndex:0];
}
cell.dateLabel.text = [[NSString alloc] initWithFormat:#"%#", [Utils dateTransform:[Date stringByReplacingOccurrencesOfString:#" " withString:#""] FromFormat:#"dd-MM-yyyy" ToFormat:#"dd-MMMM-yyyy"]];
NSString *Title = #"";
for (NSString *word in myArray) {
Title = [Title stringByAppendingString:word];
Title = [Title stringByAppendingString:#" "];
}
cell.titleAndDescLabel.text =[NSString stringWithFormat:#"%# %#", Category,Title];
Your have to use for loop to get value
for (NSInteger i=0; i<[[jsonObject objectForKey:#"yourMainKey"]count]; i++)
{
NSString *strname =[[[jsonObject objectForKey:#"yourMainKey"]objectAtIndex:i]objectForKey:#"date"];
NSLog(#"strname==%#, strname);
NSString *str title =[[[jsonObject objectForKey:#"yourMainKey"]objectAtIndex:i]objectForKey:#"title"];
NSLog(#"strtitle ==%#, strtitle);
NSString *str description =[[[jsonObject objectForKey:#"yourMainKey"]objectAtIndex:i]objectForKey:#"description"];
NSLog(#"description ==%#, description);
}
I need help identifying my error. Does anyone know why it errors?
if (result == NSFileHandlingPanelOKButton) {
NSString *filePath = [[openPanel URLs] objectAtIndex:0];
NSLog(#"%#", filePath);
*CODE WORKS UP TO HERE*
NSString *strTemp = [self extractString:filePath toLookFor:#"//" skipForwardX:2 toStopBefore:#".png"];
NSLog(#"%#",strTemp);
NSString *copyScript = [NSString stringWithFormat:#"%# /tmp/%#.png", strTemp, myString];
strTemp = [[NSString alloc] init];
NSString *path = #"/Applications/APP.app/Contents/Resources/copy.sh";
NSArray *args = [NSArray arrayWithObjects:copyScript, nil];
[[NSTask launchedTaskWithLaunchPath:path arguments:args] waitUntilExit];
NSString* linkName = #"/tmp/";
NSString* extension = #".png";
NSString* fullPath = [NSString stringWithFormat:#"%#%#%#", linkName, myString, extension];
urlPathOfFile = [NSString stringWithFormat:#"URL/%#%#", myString, extension];
fileURL = [NSURL URLWithString:fullPath];
action = upload;
[self runAction];
Is it a memory error because I have too many strings?
There's a high probability that filePath points to a NSURL object, not NSString.
Here is the method that I'm using for a console output. How can I output to a text file?
#implementation GetMoves
- (id)initWithDevice:(Device *)device{
if(self = [super init]){
_device = device;
}
return self;
}
- (void)Render{
[super ClearConsole];
printf("MOVES INFO\n");
printf("==================================\n");
NSArray* data = [_device GetData:NULL];
NSDateFormatter* dateFormatter = [[NSDateFormatter alloc] init];
[dateFormatter setDateFormat:#"yyyy-MM-dd HH:mm:ss"];
if(data != nil){
for(int i = 0; i < data.count; i++){
DataPoint* current = [data objectAtIndex:i];
NSMutableString* output = [[NSMutableString alloc] init];
[output appendFormat:#"%d",(i+1)];
[output appendString:#" - "];
[output appendString:[dateFormatter stringFromDate:current.RecordedAt]];
[output appendString:#" - "];
[output appendFormat:#"%d",current.StepCount];
printf("%s\n", [output UTF8String]);
}
}
else
printf("No new data found on device.\n");
printf("\n");
printf("==================================\n");
printf("\n");
printf("Press ENTER to continue.");
fgetc(stdin);
}
#end
You can simply write as :
NSString *path = [#"~" stringByExpandingTildeInPath] ;
//change your path here
path=[path stringByAppendingString:#"/Documents/*REPORTS/"];
//make a file name to write the data to using the documents directory:
NSString *fileName = [NSString stringWithFormat:#"%#/TWCodeFile.txt",path];
//create content - four lines of text
NSString *content = #"The content of file, can be more by appending string.";
//save content to the documents directory
[content writeToFile:fileName
atomically:NO
encoding:NSStringEncodingConversionAllowLossy
error:nil];
I wonder if it is possible to fill rangeOfString objects of a NSArray. Because I have a long list of objects for after rangeOfString:
NSArray biglist´s count is higher than list´s count.
I want to filter away the objects from the small list of the main list.
Please tell me if this is not clear.
My codes below:
NSArray *biglist = [[NSArray alloc] initWithArray:
[[NSString stringWithContentsOfFile:[[NSBundle mainBundle] pathForResource:#"mainlist" ofType:#"txt"]
encoding:NSUTF8StringEncoding error:NULL] componentsSeparatedByString:#"\n"]];
NSArray *list = [[NSArray alloc] initWithArray:
[[NSString stringWithContentsOfFile:[[NSBundle mainBundle] pathForResource:#"smalllist" ofType:#"txt"]
encoding:NSUTF8StringEncoding error:NULL] componentsSeparatedByString:#"\n"]];
for (NSString *listword in list);
NSMutableArray *wordlist = [[NSMutableArray alloc] init];
NSMutableArray *worindex = [[NSMutableArray alloc] init];
NSMutableIndexSet *mindexes = [[NSMutableIndexSet alloc] init];
NSMutableDictionary *mutdic = [[NSMutableDictionary alloc] init];
NSMutableArray *mutarray = [[NSMutableArray alloc] init];
for (NSString *s in mainlist)
{
NSRange ran = [s rangeOfString:listword];
if (ran.location !=NSNotFound)
{
//my codes here
}
}
EDIT:
I think I can solve this by writing
int i;
for (i = 0; i<[list count]; i++)
{
NSString *same = [list objectAtIndex:i];
NSLog (#"listword: %#", same);
}
But I am not sure where to place it, inside the for loop s in mainlist or outside.
EDIT: This for loop works inside the main for loop.
EDIT:
Tried these codes, but it doesnt work somehow..
NSArray *list = [[NSArray alloc] initWithArray:
[[NSString stringWithContentsOfFile:[[NSBundle mainBundle] pathForResource:#"small" ofType:#"txt"]
encoding:NSUTF8StringEncoding error:NULL] componentsSeparatedByString:#"\n"]];
NSArray *mainlist = [[NSArray alloc] initWithArray:
[[NSString stringWithContentsOfFile:[[NSBundle mainBundle] pathForResource:#"mainlist" ofType:#"txt"]
encoding:NSUTF8StringEncoding error:NULL] componentsSeparatedByString:#"\n"]];
NSMutableArray *large = [NSMutableArray arrayWithArray:mainlist];
NSArray *newlarge;
for (NSString *listword in list)
{
NSPredicate *predicate = [NSPredicate predicateWithFormat:#"(SELF beginswith[c] %#)",listword];
newlarge = [large filteredArrayUsingPredicate:predicate];
}
NSLog (#"large: %#", newlarge);
NSLog (#"finished!");
"I want to filter away the objects from the small list of the main list."
If I understand correctly, you want to remove an array of items from another array. You don't want to do that much work and allocations inside an n^2 loop.
This removes an array of items from another array. Depending on how large your array is you may need to optimize further but this works:
NSArray *small = [NSArray arrayWithObjects:#"three", #"two", nil];
NSMutableArray *large = [NSMutableArray arrayWithObjects:#"one", #"two", #"three", #"four", nil];
[large removeObjectsInArray:small];
// print
for (NSString *current in large)
{
NSLog(#"item: %#", current);
}
This outputs:
2011-10-13 08:39:21.176 Craplet[5235:707] item: one
2011-10-13 08:39:21.178 Craplet[5235:707] item: four
I figured it out by myself and solved this :)
It works almost perfectly.
My codes:
NSArray *big = [[NSArray alloc] initWithObjects:#"hello ->mache", #"heisann hoppsann ->hiya", #"nei men ->da", #"however ->what", #"may ->april", #"mai ->maj", nil];
NSArray *small = [[NSArray alloc] initWithObjects: #"heisann ", #"nei men ", #"however ", #"mai", nil];
NSMutableArray *smallwithh = [[NSMutableArray alloc] init];
NSMutableIndexSet *mindexes = [[NSMutableIndexSet alloc] init];
for (NSString *same in small)
{
NSLog (#"listword: %#", same);
for (NSString *s in big)
{
NSRange ran = [s rangeOfString:same];
if (ran.location !=NSNotFound)
{
[smallwithh addObject:s];
NSUInteger ind = [big indexOfObject:s];
[mindexes addIndex:ind];
}
}
}
NSLog (#"smallwith: %#", smallwithh);
[smallwithh release];
NSMutableArray *newWords =[NSMutableArray arrayWithArray: big];
[newWords removeObjectsAtIndexes: mindexes];
[big release];
[small release];
NSLog (#"newWords: %#", newWords);