For example, I have an array
NSArray *array = [NSArray arrayWithObjects:#"one<true>",#"two<false>",#"three<true>",#"four<false>"];
I want the output as NSString using componentsJoinedByString
"one<true>'&'two<false>'&&'three<true>'&'four<false>'&&'"
That is, in an array if an object contain a value <true> it should be joined by '&' and if an array value contain a value <false> it should be joined by '&&'.
I know, I can run a for loop and using if condition, I can achieve the output. But I'm looking for other efficient way to implement this.
Thanks in advance.
It may be help
you can use stringByReplacingOccurrencesOfString
for ex:
yourArrayJoinString=[yourArrayJoinString stringByReplacingOccurrencesOfString:#"<true>" withString:#"<true>'&'"];
yourArrayJoinString=[yourArrayJoinString stringByReplacingOccurrencesOfString:#"<false>" withString:#"<false>'&&'"];
Try with this
NSArray *array = [NSArray arrayWithObjects:#"one<true>",#"two<false>",#"three<true>",#"four<false>" ,nil];
NSString *str = [array componentsJoinedByString:#""];
str =[str stringByReplacingOccurrencesOfString:#"<false>" withString:#"<false>'&&'"];
str =[str stringByReplacingOccurrencesOfString:#"<true>" withString:#"<true>'&'"];
Related
I have a problem with NSString and NSMutableArray.
When I retrieve a string from mutable array ,it has more white spaces, and I don't understand why it's happening.
I'll explain, I have an array and populate it by query (using sqlite3):
NSMutableArray *fileNameAttached = [[NSMutableArray alloc] initWithArray:[self.dbManager loadDataFromDB:query]];
and it's like this:
<__NSArrayM 0x15e233980>(
<__NSArrayM 0x15e26afd0>(
Allegato N. 1
)
)
When I retrieve the string Allegato N.1 with this code:
NSString *test = [NSString stringWithFormat:#"%#", [fileNameAttached objectAtIndex:0] ];
string test is like this:
(
"Allegato N. 1"
)
Why my string isn't only:
Allegato N.1
When I put it in a label it's not correct because contains () and white spaces.
The query for DB is:
NSString *query = [NSString stringWithFormat:#"SELECT fileName FROM Attach WHERE ID = '%#';",ticketID];
and works perfectly,in fact when I populate tableview cell it's OK. But I don't understand because my string test contains 3 line with more white spaces.
Please help Me.
Thank you and sorry for my english.
In your log there are two arrays.
(
(
Allegato N. 1
)
)
There are two round brackets thats means two array.
You are fetching data like NSString *test = [NSString stringWithFormat:#"%#", [fileNameAttached objectAtIndex:0] ];
That means first object of outer array so it is another array. so you need to do something like
NSArray *temp =[fileNameAttached objectAtIndex:0];
NSString *test = [NSString stringWithFormat:#"%#", [temp objectAtIndex:0] ];
I think you are using appcoda's DBManager class to do this. If it is so then you everytime got two array when load query.
Hope this will help :)
I need to pass this array to SOAP API as a parameter. The back-end guy is new to building APIs (C#/.NET) and I have never implemented this kind of API before. There are 4-5 SO question related to this. But none of them were the solution as per my query.
NSArray *arr = [NSArray arrayWithObjects:#"1",#"2", nil];
NSString *soapURL = #"http://tempuri.org/IService1/addRecord";
NSString *soapBody = [NSString stringWithFormat:#"<addRecord xmlns=\"http://tempuri.org/\">"
"<id>%#</id>"
"<title>%#</title>"
"<record>%#</record>"
"</addRecord> \n” ,#“1”,#“abc", arr ];
NSLog(#"%#",soapBody);
Error:
value in string The formatter threw an exception while trying to deserialize the message: Error in deserializing body of request message for operation 'addRecord'. End element 'record' from namespace 'http://tempuri.org/' expected. Found text '(
1,
2
)'.
One thing I came to know that I cannot pass array directly in to soapBody. What what is the alternative?
The API is working fine at the back-end.
some comments:
NSArray *arr = [NSArray arrayWithObjects:#"1",#"2", nil];
please write instead the modern form:
NSArray *arr = #[#"1",#"2"];
Also, your question is filled with wrong types of quotes (“1”). Make sure to use the regular quotes, i.e. ".
When you use "stringWithFormat" with %# and provide an array, you must understand what you are getting there. let's try:
NSArray *arr = #[#"1",#"2"];
NSString *str = [NSString stringWithFormat:#"<%#>", arr];
NSLog(#"%#", str);
The result is:
<(
1,
2
)>
It means that between your <record> and </record> you inserted two numbers separated by a comma and surrounded by parentheses, plus some \n.
Is this what your server is expecting?
So I am not solving your problem, but you must format your string the right way and verify it using your NSLog command. Hoping it is helping.
EDIT
If for example you need to provide the values of the array within <value>...</value> than you can do this:
NSArray *arr = #[#"1", #"2"];
NSMutableString *mStr = [NSMutableString string];
for (NSString *value in arr) {
[mStr appendFormat:#"<value>%#</value>", value];
}
NSLog(#"<record>%#</record>", mStr);
And the result will be
<record><value>1</value><value>2</value></record>
Finally I resolved this issue with this code:
NSString *soapBody = [NSString stringWithFormat:#"< addRecord xmlns=\"http://tempuri.org/\" xmlns:arr=\"http://schemas.microsoft.com/2003/10/Serialization/Arrays\" > \n"
"<ID>1</ID>\n"
"<title>ABC</title>\n"
"<record>\n"];
for (int i=0; i<arrRecord.count; i++) {
soapBody = [NSString stringWithFormat:#"%# <arr:int>%#</arr:int>\n",soapBody,arrRecord[i]];
}
soapBody = [NSString stringWithFormat:#"%# </record></addRecord> \n",soapBody];
I needed to define "arr" in the parent node and type of element(int) in the record array.
Suppose I have two NSMutableString like this:-
String 1 ----- {aaa,bss,cdd,dff,eee,fgh}
String 2 ----- {aaa,bss,cdd}
How can we find the the difference between String 1 & String 2 in an NSArray:-
Like this:- { dff,eee,fgh }
As mentioned in duplicate question it is different.
Put both these strings in two different NSMutableSets and then subtract 2nd from 1st.
You will have your result.
NSString* str1 = #"aaa,bss,cdd,dff,eee,fgh";
NSString* str2 = #"aaa,bss,cdd";
NSMutableSet *set1 = [NSMutableSet setWithArray:[str1 componentsSeparatedByString:#","]];
NSMutableSet *set2 = [NSMutableSet setWithArray:[str2 componentsSeparatedByString:#","]];
[set1 minusSet:set2];
NSLog(#"result %#",[set1 allObjects]);
Try with NSMutableArray to remove same objects.
For Eg.
NSString *s1 = #"aaa,bss,cdd,dff,eee,fgh";
NSString *s2 = #"aaa,bss,cdd";
NSArray *arr1 = [s1 componentsSeparatedByString:#","];
NSArray *arr2 = [s2 componentsSeparatedByString:#","];
NSMutableArray *resArray = [NSMutableArray arrayWithArray:arr1];
[resArray removeObjectsInArray:arr2];
NSString *res = [resArray componentsJoinedByString:#","];
NSLog(#"Result :: %#", res);
Hopefully, it'll help you.
Thanks.
First part of the problem is to separate each string into substrings separated by the commas.
To create the substrings you can use
[string substringFromIndex:index] - to get an NSString from that index foward
[string substringToIndex:index] - to get an NSString from the begining to that index
Or you could combine it into
[string substringWithRange:NSMakeRange(fisrtIndex, secondIndex)] - to get a strin from the first index to the second index
Those are the basic operations. But there are a lot more in this case you could use specifically:
[string componentsSeparatedByString:#","] to get an NSArray with all the substrings. That would have the problem of the '{' and '}' appearing in the first and last component. This can be solved in many ways:
by first trimming the string using the substring methods already explained
by using another method altogether
[string componentsSeparatedByCharactersInSet: [NSCharacterSet characterSetWithCharactersInString:#",{"]] The problem with this method is, because your strings start/end with one of the separators you would get the first/last component an empty string. You can just remove it from the array or ignore it or choose the other method, your choice.
Now that you know how to get the substrings all you need to know is how to compare the two. There are literally many ways to do this. I am just going to name a few. Of course each solution has its own advantages and disadvantages and code complexity.
1 - comparing each substring one by one the the other using isEqualToString:
2 - comparing each substring from one of the original strings with the full second original string by using [string2 rangeOfString:substring].location != NSNotFound
3 - if you have iOS 8 or OS X Yosemite you can use [string2 containsString:substring]
4 - You can transform the arrays of substrings into sets and then compare them as Ankit Srivastava suggested
5 - You can use the removeObjectsInArray to get the substrings that are not common between the two and then use that newly created array to removeObjectsInArray to the original and have just the common...
Really the possibilities are almost endless
I have an array named as child_list like child_list: "9,8,21,22,20,24,25", take it in NSString at index 0 when I convert it into string its work but when i use NSMutableArray it crashed, I don't know why.
My code is here:
if([theDictionary objectForKey:#"child_list"])
{
NSString *str = [[theDictionary objectForKey:#"child_list"]objectAtIndex:0];
NSLog(#"Child List %#",str);
_child_list = [[NSMutableArray alloc ]initWithObjects: [str componentsSeparatedByString:#","], nil];
}
When break point come on str it show result when it comes on _child_list it crashed.
Use initWithArray method while allocating _child_list NSMutableArray
if([theDictionary objectForKey:#"child_list"])
{
NSString *str = [[theDictionary objectForKey:#"child_list"]objectAtIndex:0];
NSLog(#"Child List %#",str);
_child_list = [[NSMutableArray alloc ] initWithArray:[str componentsSeparatedByString:#","]];
}
Please share what your log returns and the dictionary you used..
The code [str componentsSeparatedByString:#","] returns an Array. So, when you're allocating a mutable array, you're creating array of array... Instead using initWithObjects, use initWithArray method and pass [str componentsSeparatedByString:#","] to it.
I have an array, lines, that consists of the lines in a text file. I want to choose a particular line based on its first string. So I loop through the file like this:
for(NSString *str in lines)
{
myMutableArray = [str componentsSeparatedByCharactersInSet: [NSCharacterSet characterSetWithCharactersInString:#";"]];
//Get myMutableArray[0] and check if it's the correct line
// If not, empty the NSMutableArray and start over
}
I know that the code line inside the loop will return an NSArray, so this won't work. What is the best way to solve this problem?
Hank
myMutableArray = [[str componentsSeparatedByCharactersInSet: [NSCharacterSet characterSetWithCharactersInString:#";"]] mutableCopy];
Suits?