compare a string with NSMutablearray data in xcode?

Question

I have a NSMutableArray and I need to compare the content in it with a NSString..But couldn't get it ?

My array

(
{
  Code=Sunday;
},
{
 Code=Monday;
},
{
Code=Tuesday;
}
)

I m comparing like this :

BOOL isTheObjectThere = [array containsObject:weekday];

if([arr count]==0 && isTheObjectThere==YES)
{
//do something
}
else
{
//do something
}

Here weekday is NSString whose value=Sunday

But isTheObjectThere is returning NO..

Where Im going wrong?

this is a common issue while using the method [array containsObject:x];, so its better to use the method shown in the answer below, but will consume more time as the contents of the array increases — DD_
– DD_, Commented Dec 7, 2012 at 9:45

Paras Joshi · Accepted Answer · 2012-12-07 10:38:03Z

1

see this example

NSMutableArray* array = [NSArray arrayWithObjects:@"Sunday", @"Monday", @"Tuesday", nil];

NSPredicate *predicate = [NSPredicate predicateWithFormat:@"SELF IN %@", array];
BOOL isTheObjectThere = [predicate evaluateWithObject:@"Sunday"];
NSLog(@"isTheObjectThere %d",isTheObjectThere);

its work fine and return isTheObjectThere 1

edited Dec 7, 2012 at 10:38

answered Dec 7, 2012 at 9:42

Paras Joshi

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7 Comments

Sindhia Over a year ago

No actually my array is NSMutableArray and I need to check some condition after getting BOOL value...I have edited my code ..Can u please have a look and rectify my mistake ..

Paras Joshi Over a year ago

@Sindhia i think you want to add the sunday value in another array right??

Paras Joshi Over a year ago

yes dude i know that sunday is string but i say that i think you want to add sunday if isThere Bool value return yes.. ok now 'use this dude.. NSPredicate *predicate = [NSPredicate predicateWithFormat:@"SELF IN %@", theArray]; BOOL result = [predicate evaluateWithObject:theString];

Sindhia Over a year ago

But I dont find NSLog get printed and I m gettting an orange coloured line below the code..It is neither showing error nor warning at that orange line

Paras Joshi Over a year ago

dude its work fine mate just take my code now and paste in your viewWillAppear method and see what u get its working fine dude.. try it now and reply in any error u got ok dude..

|

Prasad G · Accepted Answer · 2012-12-07 09:43:18Z

0

The array contains dictionary elements, then retrieve values of key(Code).

 NSMutableArray *yourArray = [[NSMutableArray alloc] init];
    for (NSDictionary *dict in array) {
        [yourArray addObject:[dict valueForKey:@"Code"]];
    }
    BOOL isTheObjectThere = [yourArray containsObject:@"Sunday"];

answered Dec 7, 2012 at 9:43

Prasad G

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5 Comments

Prasad G Over a year ago

@Sindhia: It means you didn't get answer or didn't understand.

Sindhia Over a year ago

I didn't get answer .it is returning NO when a match occurs...what elz should I need to modify?

Prasad G Over a year ago

NSLog(@"your array:%@",yourArray); May i know what the output is?

Sindhia Over a year ago

( { Code=Sunday; }, { Code=Monday; }, { Code=Tuesday; } )

Prasad G Over a year ago

This is your getting array. But i have written code using this array. array = ( { Code=Sunday; }, { Code=Monday; }, { Code=Tuesday; } ). From this array, i derived another array(yourArray). The result: yourArray = (Sunday,Monday,Tuesday)

DD_ · Accepted Answer · 2012-12-07 09:51:27Z

0

BOOL isTheObjectThere = [array containsObject:weekday];

will not work, better try the following method.

    NSMutableArray* inputArray = [NSArray arrayWithObjects:@"Sunday", @"Monday", @"Tuesday", nil];

for (NSString* item in inputArray)
{



if ([item rangeOfString:@"Sunday"].location != NSNotFound)


{
   //do something
  }



else


{
  //do something;
 } 

}

answered Dec 7, 2012 at 9:51

DD_

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Comments

polterfest · Accepted Answer · 2012-12-07 11:53:49Z

0

NSString *yourString = @"Monday";

for (NSString* item in inputArray){
if ([yourString rangeOfString:item].location != NSNotFound)
//Do something;

else
// Do the other Thing;
}

answered Dec 7, 2012 at 11:53

polterfest

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