{
"id"=12
"genres_en" = "thriller,movies,action";
}
{
"id"=13
"genres_en" = "thriller,horror";
}
Hi everyone ,
I have one json like this..I mean i have one content and all movie has their genre ..And i need to do one categorization ..For example I need to check which genre of movie is horror..Or which one is thriller..I m getting all value like this:
--> "horror,movies"
But how can i do the controllation to check whether the genre of this movie includes horror or not..??what is your suggesstion?
Thank you
You could use componentsSeparatedByString
NSDictionary *dic = PARSE The JSON;
NSString *values = [dic objectForKey:"genres_en"];
NSString *firstValue = [[values componentsSeparatedByString:","] objectAtIndex:0];
I don't have Xcode nearby, so the following code may contain an error(or two :) ).
Try it like that:
NSDictionary *yourDict = //your parsed json
NSString *genres = [yourDict objectForKey:#"genres_en"];
if ([genres rangeOfString:#"horror"].location != NSNotFound) {
return YES;
} else {
return NO;
}
Hope it helps
for(int j=0;j< GenresArray.count; j++)
{
NSString *value=[[genre componentsSeparatedByString: #","]objectAtIndex:j];
if([value isEqualToString:#"movies"])
{
[genreMovies addObject:value];
}
}
Thank you for your help guys ..Now i have my result:)
You can try to check if the string contains the substring you want . Like this:
NSString *typesString = [dic objectForKey:"genres_en"];
NSRange range = [typesString rangeOfString:#"horror"];
if(range.location != NSNotFound)
{
//it contains the substring "horror"
}
Or , the better way would be to get the array of types.
NSArray *types = [[typesString componentsSeparatedByString:","];
Now you can store this array for each entry and whenever you want to check if it belongs to a certain gender , just loop through the types array ( of each entry ) and compare the strings.
Hope this helps.
Cheers!
Related
I'm new to IOS and I'm not sure if I'm on the right track. What I need to know is if I'm on the right track and if I'm off it a hint on what to fix so I can get back on track. The mutable Array should read an array of speakers and say "Hello, my name is <speakerArray>" it should do that 8 times with a different name each time. This is what I Have:
- (NSArray*)badgesForSpeakers:(NSArray*)speakers {
for(speakers i = 0; i => 7; i++)
{
NSString *greetings =#"Hello, my name is .";
NSMutableArray *badges = [speakers arrayByAddingObjectsFromArray:greetings];
}
return badges;
}
Let's take this one step at a time. First of all, your operator in the loop is wrong; you mean to execute while i is less than or equal to 7. Thus, change => to <=. However, it's more stylish to say i < 8. And finally, it's most stylish of all to use what's called "Fast Enumeration", which allows you to loop without an index at all. In fact, it will work no matter how many items are in your speakers array! That takes us here:
- (NSArray*)badgesForSpeakers:(NSArray*)speakers {
for (NSString* speaker in speakers)
{
NSString *greetings =#"Hello, my name is .";
NSMutableArray *badges = [speakers arrayByAddingObjectsFromArray:greetings];
}
return badges;
}
Next, greetings isn't an array! It's a string. That's why calling -arrayByAddingObjectsFromArray: doesn't make any sense, and why the compiler isn't going to like it. Let's make its name singular, greeting, to reflect this fact. Strategy: Your goal here is to create an empty array, then construct items one by one and add them to that array. That takes us to:
- (NSArray*)badgesForSpeakers:(NSArray*)speakers {
NSMutableArray *badges = [NSMutableArray array]; //Here we make an empty array
for (NSString* speaker in speakers)
{
NSString *greeting =#"Hello, my name is .";
[badges addObject:greeting]; //Here we add one item to it each time 'round the loop
}
return badges;
}
Last, your string has no interpolation right now! It reads literally "Hello, my name is ." We do string interpolation using the -stringWithFormat: method.
Finished Product:
- (NSArray*)badgesForSpeakers:(NSArray*)speakers {
NSMutableArray *badges = [NSMutableArray array];
for (NSString* speaker in speakers)
{
NSString *greeting = [NSString stringWithFormat:#"Hello, my name is %#.",speaker];
[badges addObject:greeting];
}
return badges;
}
That should get you started with fast enumeration and string interpolation. Remember to compile your code often and try to understand the compiler errors--it would have helped you with some of these issues.
Maybe you mean this
- (NSMutableArray *)badgesForSpeakers:(NSArray *)speakers {
NSMutableArray *badges = [[NSMutableArray alloc] init];
for (NSString *speaker in speakers) {
[badges addObject:[NSString stringWithFormat:#"Hello, my name is %#", speaker]];
}
return badges;
}
plz use this code
- (NSArray*)badgesForSpeakers:(NSArray*)speakers {
NSMutableArray *badges = [NSMutableArray alloc];
for(int i = 0; i < speakers.count; i++)
{
NSString *greetings =[NSString stringWithFormat:#"Hello, my name is .%#",[speakers objectAtIndex:i]];
badges = [speakers addObject:greetings];
}
return [badges copy];
}
I am trying to write a method which allows me to create a different String permutations, based on the values I have stored within 3 different arrays. Currently I have a NSMutableDictionary that contains 3 different keys, and associated to each key we have an NSMutableArray array that contains a list of different String objects.
How woulld I loop through each of my NSMutableArray arrays which are stored within my NSMutableDictionary, and build a string value for each node from the arrays. So essentially, something like the following: A1[0] = "Hello", A2[0] = "There", A3[0] = "Guys", which would essentially build me a string like this: "HelloThereGuys".
Any suggestions, or possibly different approaches to this problem will be appreciated.
First of all I want to agree with hochl. ;-) But I think, that you want to create a string containing a word from each array in the same index position?
NSMutableArray *enums = [NSMutableArray new];
for( NSString *key in dictionary )
{
NSEnumerator *enum = [dictionary[key] objectEnumerator]; // Forgot that in prior version
[enums addObject:enum];
}
while( YES )
{
NSMutableString *line = [NSMutableString new];
BOOL done = NO;
for( NSEnumerator *enum in enums )
{
NString *word = [enum nextObject];
if( word == nil )
{
done = YES;
break;
}
[line addString:word];
}
if (done)
{
break;
}
NSLog (#"%#", line );
}
Did I get you right?
i have implemented a search bar that searching trough an array of countries(presented in a picker view), the problem is that the user need to type the full country name that it will find it and i want him to be able to type even one letter and it will show the first country that starts with that letter and if types another than it sorts even further etc etc.
Anyone have any ideas??
for(int x = 0; x < countryTable.count; x++){
NSString *countryName = [[countryTable objectAtIndex:x]objectForKey:#"name"];
if([searchedStr isEqualToString:countryName.lowercaseString]){
[self.picker selectRow:i inComponent:0 animated:YES];
flag.image = [UIImage imageNamed:[[countryTable objectAtIndex:i]objectForKey:#"flag"]];
}
}
There's a method on NSArray called filteredArrayUsingPredicate: and a method on NSString called hasPrefix:. Together they do what you need...
NSString *userInput = //... user input as lowercase string. don't call this countryName, its confusing
NSPredicate *p = [NSPredicate predicateWithBlock:^BOOL(id element, NSDictionary *bind) {
NSString countryName = [[element objectForKey:#"name"] lowercaseString];
return [countryName hasPrefix:userInput];
}];
NSArray *filteredCountries = [countryTable filteredArrayUsingPredicate:p];
If you're on iOS 8 or OS X Yosemite, you can do:
NSString *country = countryName.lowercaseString; //"england"
NSString *needle = #"engl";
if (![country containsString:needle]) {
NSLog(#"Country string does not contain part (or whole) of searched country");
} else {
NSLog(#"Found the country!");
}
Else, if on versions below iOS 8:
NSString *country = countryName.lowercaseString; //"england"
NSString *needle = #"engl";
if ([country rangeOfString:needle].location == NSNotFound) {
NSLog(#"Country string does not contain part (or whole) of searched country");
} else {
NSLog(#"Found the country!");
}
Lastly, just iterate through all possible countries and apply this to them all. There might exist more robust solutions out there (like danh's solution with some smaller modifications), but this is by far the easiest to start with.
I am using Mantle to parse some JSON data from Yelp.
For each business returned I get an NSArray of categories. This would be an example:
yelpCategories = (
(
"Wine Bars",
"wine_bars"
),
(
"Ice Cream & Frozen Yogurt",
icecream
)
);
yelpCategories is the name of the array that I save. Later on I am trying to parse the array into a string:
NSMutableString *yelpCats = [[NSMutableString alloc] init];
for (NSObject * obj in business.yelpCategories)
{
[yelpCats appendString:[NSString stringWithFormat:#"%#,",[obj description]]];
}
The issue is with the above. I am being returned a string just as "(" so I must be accessing the array incorrectly. How can I correctly access each object, ideally I would be looking for the end string o be #"Wine Bars, Ice Cream & Frozen Yogurt".
EDIT
The categories array: (
(
Pubs,
pubs
)
)
FINAL EDIT - Proposed Solution
for (NSArray *cats in business.yelpCategories)
{
NSString *category = [cats objectAtIndex:0];
if ([category length] > 0) {
category = [category substringToIndex:[category length] - 1];
}
if (cats == business.yelpCategories.lastObject) {
[yelpCats appendString:[NSString stringWithFormat:#"%#",category]];
} else {
[yelpCats appendString:[NSString stringWithFormat:#"%#, ",category]];
}
}
cell.yelpCategories.text = yelpCats;
Using the description of the object gives you what you see in the debugger, which includes extra carriage returns.
What you want to do is something like:
yelpCats = [yelpCategories componentsJoinedByString:#", "];
#jeffamaphone 's answer is the correct and best way of doing things however what your doing will almost work, I think your just confused on the contents of the array.
The yelpCategories array is an array of strings so you don't need to call stringWithFormat or call the description method. In fact [obj description] will return a string so you didn't even need stringWithFormat in your example and you would have gotten the same output. To make your original method work change to:
NSMutableString *yelpCats = [[NSMutableString alloc] init];
for (id obj in business.yelpCategories)
{
//obj is a string so we can just append it.
[yelpCats appendString:obj]];
}
Also noticed I changed NSObject *obj to just id obj, this is the idiomatic way and shorthand way of declaring NSObjects in objective-c. In this example however I would actually use (NSString *category in business.yelpCategories) instead for better readability. In this case you are declaring to everyone that you expect each object in the array to be a string and then if you wanted to use NSString methods on it inside the loop then you don't have to cast it.
for (NSArray *cats in business.yelpCategories)
{
NSString *category = [cats objectAtIndex:0];
if ([category length] > 0) {
category = [category substringToIndex:[category length] - 1];
}
if (cats == business.yelpCategories.lastObject) {
[yelpCats appendString:[NSString stringWithFormat:#"%#",category]];
} else {
[yelpCats appendString:[NSString stringWithFormat:#"%#, ",category]];
}
}
cell.yelpCategories.text = yelpCats;
This question already has answers here:
Closed 10 years ago.
Possible Duplicate:
Iterar over array of entity and get value of some key based on value of “other key” matche
Please, can anyone give me a hint or tip on how I can get the value of all the salary fields in my dictionary, if the status field is not null? I only want to retrieve the salary field from those objects in the dictionary where status != null. Note that my dictionary is dynamic, meaning I may have mor than four entries. Any help or hints highly appreciated. Thank you in advance.
myArray=(
{
Name = "john1";
Address = "san diego";
Status = "active";
salary = "100;
},
{
Name = "steve ";
Address = "birmingham";
Status = "<null>";
salary = "100;
},
{
Name = "allan";
Address = "san diego";
Status = "active";
salary = "100;
},
{
Name = "peter";
Address = "san diego";
Status = "<null>";
salary = "100;
},
)
Try fast enumeration...
NSMutableArray* retreivedSalaries;
for (NSDictionary* dict in myArray) {
if (![[dict objectForKey:#"Status"] isEqualToString:#"<null>"])
[retreivedSalaries addObject:[dict objectForKey:#"salary"]];
};
Try this:
NSDictionary *salaries = nil;
NSArray *myArray .... ;
for (NSString * salary in salaries) {
if ([myArray containsObject:#"salary"]) {
if ([salaries objectForKey:#"salary"] != NULL) {
NSLog (#"do something with salary: %#", salary);
}
}
}
I Think this is iOS, myArray is an NSArray, and each dinamically person info is a NSDictionary, if this is the point, you can do the following:
for (NSDictionary *info in myArray) {
if ([info objectForKey:#"Status"] != nil && ![[info objectForKey:#"Status"] isEqual:#"<null>") {
// Store salary whatever you need and in the formar you need
NSString *salary = [info objectForKey:#"salary"];
}
}
I wrote the code without a compiler, so maybe there is some compilators errors (sorry). If I understand well your question, with that you can get the salary when the Status is not null.
Hope Helps!
I have not tested so you may need to change this
for (int i=0;i< [myArray count];i++)
{
if ([[[myArray objectAtIndex: i] objectForKey: #"Status"] isEqualToString: #"active"]) {
NSLog(#"Salary is %#",[myArray objectAtIndex: i] objectForKey: #"salary"] )
} else {
NSLog(#"Status is not active");
}
}
or you can use something like this
for (NSDictionary *salary in myArray)
{
if([message valueForKey:#"Status"] isEqualToString: #"active")
NSLog(#"Salary is %#",[message valueForKey:#"salary"]);
}
Sorting salary
You can sort the keys and then create an NSMutableArray by iterating over them.
answer from here
NSArray *sortedKeys = [[myArray allKeys] sortedArrayUsingSelector: #selector(compare:)];
NSMutableArray *sortedValues = [NSMutableArray array];
for (NSString *key in sortedKeys)
[sortedValues addObject: [myArray objectForKey: key]];