Question

I want to extract all “daughter” of a NSarray.

For example, nsarray is made like this:

hello
hi
hello daughter
my goodness
daughter (someone)
my daughter
how are you?
etc.

And I want to extract all lines that contain “daughter”. Could you point me in right direction?

My current code is:

for (NSString *mystring in self.array)
{
    if ([mystring rangeOfString:searchText].location!=NSNotFound)

{
   NSUInteger idx = [self.array indexOfObject:mystring];
   [self.filterarray addObject: mystring];
}
}

Answer 1

NSArray *lines = ...;
NSArray *filteredLines = [lines filteredArrayUsingPredicate:[NSPredicate predicateWithBlock:^BOOL(NSString *string, NSDictionary *bindings) {
    return ([string rangeOfString:searchText].location != NSNotFound);
}]];

(requires iOS 4.0 or later)

If you need to support earlier system versions use this:

NSArray *lines = ...;
NSArray *filteredLines = [lines filteredArrayUsingPredicate:[NSPredicate predicateWithFormat:@"(SELF contains[c] %@)", searchText]];

(requires iOS 3.0 or later)