How can I generate a comma-separated string in Objective-C? - objective-c

Question

I am trying to create comma separated string. e.g. abc,pqr,xyz
I am parsing the xml and want to generate the comma separated string of the values of nodes in xml.
I am doing the following:
if([elementName isEqualToString:#"Column"])
NSString *strTableColumn = [attributeDict objectForKey:#"value"];
I am getting different nodes value in strTableColumn while parsing and want to generate comma separated of this. Please help.

Answer 1

I would do to it like this. Before you start your XML processing, create a mutable array to hold each "Column" value (probably want this to be an iVar in your parser class):
NSMutableArray *columns = [[NSMutableArray alloc] init];
Then parse the XML, adding each string to the array:
if([elementName isEqualToString:#"Column"]) {
[columns addObject:[attributeDict objectForKey:#"value"]];
}
When you're done, create the comma-separated string and release the array:
NSString *strTableColumn = [columns componentsJoinedByString:#","];
[columns release];
columns = nil;

Answer 2

You can use the following code:
NSString *timeCreated = elementName;
NSArray *timeArray = [timeCreated componentsSeparatedByString:#","];
NSString *t = [timeArray objectAtIndex:0];
NSString *t1 = [timeArray objectAtindex:1];
Then append one by one string.

Answer 3

use NSMutableString
then you can use
[yourMutableString appendString:#","];//there is a comma
[yourMutableString appendString:someOtherString];
in this way your strings are separated by comma

Answer 4

This method will return you the nsmutablestring with comma separated values from an array
-(NSMutableString *)strMutableFromArray:(NSMutableArray *)arr withSeperater:(NSString *)saperator
{
NSMutableString *strResult = [NSMutableString string];
for (int j=0; j<[arr count]; j++)
{
NSString *strBar = [arr objectAtIndex:j];
[strResult appendString:[NSString stringWithFormat:#"%#",strBar]];
if (j != [arr count]-1)
{
[strResult appendString:[NSString stringWithFormat:#"%#",seperator]];
}
}
return strResult;
}

Answer 5

First thought can be that you parse the data and append commas using the NSString append methods. But that can have extra checks. So better solution is to
Parse data -> Store into array -> Add comma separators -> Finally store in string
// Parse data -> Store into array
NSMutableArray *arrayOfColumns = [[NSMutableArray alloc] init];
if([elementName isEqualToString:#"Column"]){
[arrayOfColumns addObject:[attributeDict objectForKey:#"value"]];
}
// Add comma separators -> Finally store in string
NSString *strTableColumn = [arrayOfColumns componentsJoinedByString:#","];