I have an array of people objects stored in Core Data and I would like to create a string made by combining two attributes of each, as in firstname and lastname.
NSArray *firstArr = [[Employees valueForKey:#"first"] allObjects];
NSArray *secondArr = [[Employees valueForKey:#"last"] allObjects];
I can create a string from one attribute such as "John,Jane" with
NSString *firststr = [firstarr componentsJoinedByString:#","];
Can anyone suggest how to make a string that has the first and last names separated by commas as in John Doe, Jane Doe? Imagine there is a method but I cannot find it.
You can do it like this
NSArray *firstArr = #[#"Rajat" , #"Rajat1", #"Raj"];
NSArray *secondArr = #[#"Test" , #"Test1", #"Test2"];
NSString * str = #"";
for (int i=0; i< (firstArr<secondArr ? firstArr.count:secondArr.count); i++) {
str = [str stringByAppendingString:[NSString stringWithFormat:#"%# %#,",firstArr[i],secondArr[i]]];
}
str = [str substringToIndex:[str length]-1];
NSLog(#"%#",str);
Related
I want to create a comma separated string inside loop like this :-
string=#"A,B,C,D,E";
I did something like this :
for (int j=0; j<_arrayToCarryDataFromCartToPaymentPageInPaypal.count; j++)
{
NSMutableDictionary *paypalArrayDataInDictionary=[_arrayToCarryDataFromCartToPaymentPageInPaypal objectAtIndex:j];
[productNameDetail appendString:[NSString stringWithFormat:#"%#,", [paypalArrayDataInDictionary objectForKey:#"PRODUCT"]]];
}
Here _arrayToCarryDataFromCartToPaymentPageInPaypal is my MutableArray getting from plist.
Get array of PRODUCT from the _arrayToCarryDataFromCartToPaymentPageInPaypal and then use componentsJoinedByString on it to get the string separated by ,.
NSArray *products = [_arrayToCarryDataFromCartToPaymentPageInPaypal valueForKey:#"PRODUCT"];
NSString *str = [products componentsJoinedByString:#","];
I am trying to get single characters from NSString, like "ઐતિહાસિક","પ્રકાશન","ક્રોધ". I want output like 1)ઐ,તિ,હા,સિ,ક 2) પ્ર,કા,શ,ન 3) ક્રો,ધ, but output is coming like this 1)ઐ , ત , િ , હ , િ , ક 2) પ , ્ , ર , ક , ા , શ , ન 3)ક , ્ , ર , ો , ધ
I have used code like below:
NSMutableArray *array = [[NSMutableArray alloc]init];
for (int i=0; i<strElement.length; i++)
{
NSString *str = [strElement substringWithRange:NSMakeRange(i, 1)];
[array addObject:str];
}
NSLog(#"%#",array);
Let's take strElement as "ક્રોધ" then I got output like this ક , ્ , ર , ો , ધ
But I need output like this ક્રો,ધ
Is there any way that I can get the desired output? Any method available directly in iOS or need to create it by my self then any way or idea how to create it?
Any help is appreciated
Your code is assuming that each character in the string is a single unichar value. But it is not. Some of the Unicode characters are composed of multiple unichar values.
The solution is to use rangeOfComposedCharacterSequenceAtIndex: instead of substringWithRange: with a fixed range length of 1.
NSString *strElement = #"ઐતિહાસિક પ્રકાશન ક્રોધ";
NSMutableArray *array = [[NSMutableArray alloc]init];
NSInteger i = 0;
while (i < strElement.length) {
NSRange range = [strElement rangeOfComposedCharacterSequenceAtIndex:i];
NSString *str = [strElement substringWithRange:range];
[array addObject:str];
i = range.location + range.length;
}
// Log the results. Build the results into a mutable string to avoid
// the ugly Unicode escapes shown by simply logging the array.
NSMutableString *res = [NSMutableString string];
for (NSString *str in array) {
if (res.length) {
[res appendString:#", "];
}
[res appendString:str];
}
NSLog(#"Results: %#", res);
This outputs:
Results: ઐ, તિ, હા, સિ, ક, , પ્ર, કા, શ, ન, , ક્રો, ધ
Well this is my code:
NSDictionary *dicto;
NSString *ndccode;
NSString *string=#" ";
for (int i=0; i<array.count; i++) {
dicto=[array objectAtIndex:i];
ndccode=[dicto objectForKey:#"NDCCode"];
string=[string stringByAppendingString:ndccode];
string=[string stringByAppendingString:#"\n"];
NSLog(#"%#",string);
}
NSLog(#"%#",string);
In the above code, i have values in dicto nsdictionary which loops one by one value and assigns to ndccode which is string. Then I am adding to string so that I can append it to the next line.
output :
name1
name2
name3
.....
Instead of assigning to the string. I want to assign it to an array.Could you please tell me how to assign it to an array for this example,since it is in loop. I want to use the array for later purposes.
Thank you in advance.
NSDictionary *dicto;
NSString *ndccode;
NSMutableArray *outputArray=[NSMutableArray new];
for (int i=0; i<array.count; i++) {
dicto=[array objectAtIndex:i];
ndccode=[dicto objectForKey:#"NDCCode"];
[outputArray addObject:ndccode];
}
or even more succinctly
NSArray *outputArray = [array valueForKey:#"NDCCode"];
Pretty straightforward question:
I have an array like so:
#[#"John Doe", #"Mister Appleseed", #"Steve"];
if it has two (or more) words, I want to delete them all but the first, so the output array should looke something like this:
#[#"John", #"Mister", #"Steve"];
How do I do this?
NSArray * arr = #[#"John Doe", #"Mister Appleseed", #"Steve"];
NSMutableArray * tmp = [NSMutableArray array];
for (NSString * s in arr)
{
NSArray * cmpnts = [s componentsSeparatedByString:#" "];
[tmp addObject:cmpnts[0]];
}
arr = tmp;
Check the following code:
NSMutableArray *finalArray = [[NSMutableArray alloc] init];
NSArray *sourceArray = #[#"John Doe", #"Mister Appleseed", #"Steve"];
for(NSString *str in sourceArray){
[finalArray addObject:[str componentsSepratedByString:#" "] objectAtIndex:0]];
}
You iterate over the array of names, split each at spaces (" "), and then grab the first object: the first name.
NSArray *nameArray = #[#"Name", #"Name Two"]; // original array
NSMutable *modifiedNameArray = [NSMutableArray new]; // new mutable array to add new names
for (NSString *fullName in nameArray) { // for loop
NSString *firstName = [[fullName componentsSeparatedByString:#" "] objectAtIndex:0]; // extract first name
[modifiedNameArray addObject:firstName]; // add first name to mutable array
}
You have to have two arrays, because you cannot mutate an array while it is being used in a loop (even if it's an NSMutableArray).
I have been struggling with this question for couple days now. Really need your help and opinion.
We have a string, that holds a text:
NSString *contentOfFile = [[NSString alloc] initWithString:#"This is string#1"];
Now I have to log symbols, that were met in this string without duplicates. Result should look like this:
whitespace symbol here
#
1
g
h
i
n
r
s
t
I know that this is solved very simple in C code using char set and iterators but I am looking for the same simple and elegant way of handling this operation in objective-c.
I was thinking of using NSCharacterSet on the string somehow but I have a lack of knowledge in objective-c so I need your help guys please. Thanks in advance to everyone who replies.
Take advantage of a trait of NSSet: Its members are distinct.
NSString *contentOfFile = #"This is string#1";
NSMutableSet *set = [NSMutableSet set];
NSUInteger length = [contentOfFile length];
for (NSUInteger index = 0; index < length; index++)
{
NSString *substring = [contentOfFile substringWithRange:NSMakeRange(index, 1)];
[set addObject:substring];
}
NSLog(#"%#", set);
However, there's one remaining problem, and that is the members of a set are also unordered. Fortunately, arrays are ordered. So if you change the last line:
NSSortDescriptor *sortDescriptor = [NSSortDescriptor sortDescriptorWithKey:#"self" ascending:YES];
NSArray *array = [set sortedArrayUsingDescriptors:#[sortDescriptor]];
NSLog(#"%#", array);
If case insensitivity is important to you, there unfortunately is no 'case-insensitive' option for NSSet. However, you could convert your source string to all lowercase, like this:
NSString *contentOfFile = [#"This is string#1" lowercaseString];
and this would give you results exactly matching your sample output.
// Create the string
NSString *contentOfFile = #"This is string#1";
// Remove all whitespaces
NSString *whitespaceRemoval = [contentOfFile stringByReplacingOccurrencesOfString:#" " withString:#""];
// Initialize an array to store the characters
NSMutableArray *components = [NSMutableArray array];
// Iterate through the characters and add them to the array
for (int i = 0; i < [whitespaceRemoval length]; i++) {
NSString *character = [NSString stringWithFormat:#"%c", [whitespaceRemoval characterAtIndex:i]];
if (![components containsObject:character]) {
[components addObject:character];
}
}