Filter the array that contains the specified string

Question

I am trying to develop an app that contains an array with a huge number of words. I want to create a new filtered array from it. Filtering is done based on a pattern that I have managed to create using a regular expression. For example, I should be able to filter out the word "apple" with a pattern "ap_l_" from my array with words. Can anyone help me out?

What do you mean by that? You need to provide a little more information. — rdelmar, Aug 22 '12 at 15:30
Possible Duplicate: http://stackoverflow.com/questions/110332/filtering-nsarray-into-a-new-nsarray-in-objective-c — jtomschroeder, Aug 22 '12 at 15:32

score 6 · Accepted Answer · answered Aug 22 '12 at 16:28

Use the below code it will filter the array

-(NSMutableArray *)searchByContains:(NSString *)containsString inputArray:(NSMutableArray *)inputArray
{
    NSLog(@"orginal Array count=%d",[inputArray count]);
    NSString *expression=[NSString stringWithFormat:@"SELF contains '%@'",containsString];
    NSLog(@"expression=%@",expression);
    NSPredicate *predicate = [NSPredicate predicateWithFormat:expression];    
    NSMutableArray *mArrayFiltered = [[inputArray filteredArrayUsingPredicate:predicate] mutableCopy];

    return mArrayFiltered;
}

score 2 · Answer 2 · answered Aug 22 '12 at 15:48

Best way to filter an array is to use predicates. If you have an array of strings, for example:

NSArray *stringsArray = [NSArray arrayWithObjects:@"Joe", @"Bill", @"David", @"Jeff", nil];

you can easily filter it using filteredArrayUsingPredicate:. If, for example, you wanted to filter the above array for all instances of @"Bill", you would do it like this:

NSArray *filteredArray = [stringsArray filteredArrayUsingPredicate:[NSPredicate predicateWithFormat:@"SELF == 'Bill'"]];

if you want to filter OUT @"Bill", then you would do this:

filteredArray = [stringsArray filteredArrayUsingPredicate:[NSPredicate predicateWithFormat:@"SELF != 'Bill'"]];

and so on.

score 1 · Answer 3 · answered Aug 22 '12 at 15:31

1

if all element is string you can use .

for(NSString *str in arrayName)
  {
      if([str isEqualToString:@"searchString"])
         {

            //wirte own code here
         }



  }

answered Aug 22 '12 at 15:31

Hardeep Singh

942
8
15

Neo · Answer 4 · 2012-08-22T15:41:06.960

1

if i understood your question... try this

if([your_array containsObject: your_string]){
      do something
}

hope this helps

edited Aug 22 '12 at 15:41

answered Aug 22 '12 at 15:34

Neo

2,807
1
16
18

Filter the array that contains the specified string

4 Answers4