Check if array contain specific string

Question

I am saving different codes in a array and now want to check if one code is in the array.

I searched a bit around but nothing working...

Here you see how my array looks:

2013-04-28 12:43:23.877 myApp[9422:907] PushArray: (
    {
    code = 123;
    titel = "Test 01";
},
    {
    code = 456;
    titel = "Test 02";
},
    {
    code = 789;
    titel = "Test 03";
}
)

I tried this to check:

NSString *code = [NSString stringWithFormat:@"123"];;

if ([PushArray containsObject:code]) {
    NSLog(@"Code true!");
}else {
    NSLog(@"Code false!");
}

But every time I get "Code false!" back...

Michael Dautermann · Accepted Answer · 2013-04-28 10:59:55Z

1

The objects in your array are actually NSDictionary objects. So to compare numbers, let's enumerate on the array and do the compare on the value from that dictionary object:

NSNumber * code = [NSNumber numberWithInteger: 123];
for(NSDictionary * anEntry in pushArray)
{
    NSNumber * numberFromEntry = [anEntry objectForKey: @"code"];
    if([code isEqualToNumber: numberFromEntry])
        NSLog( @"code true!");
}

Also, notice that I changed the name of your array from "PushArray" to "pushArray". Standard Objective-C convention is to use lowercase letters for variables & objects and use uppercase for naming classes.

(the original version of my answer -- which I quickly caught and edited -- was to compare the strings; but I'm guessing those code values in the dictionary objects are actually numbers and not strings)

edited Apr 28, 2013 at 10:59

answered Apr 28, 2013 at 10:53

Michael Dautermann

89.7k18 gold badges174 silver badges223 bronze badges

Sign up to request clarification or add additional context in comments.

8 Comments

Laurenz Glück Over a year ago

oh damn I forgot that there is an dict inside the array :// Thanks a lot, u code works!

Laurenz Glück Over a year ago

Is there a way to get a NSString with "code true" or "code false" as return from the "for"?

Michael Dautermann Over a year ago

instead of "NSLog( @"code true!");", do a "return @"code true";" (assuming the return type of your function is a NSString)

Laurenz Glück Over a year ago

perfect and is there also a possibility to delete all entries in the dictionary that contain the code Like if([code isEqualToNumber: numberFromEntry]) DELETE ENTRY; Thanks a lot for u help! :)

Michael Dautermann Over a year ago

only if it's a mutable dictionary or a mutable array that we're working with.

|

Collectives™ on Stack Overflow

Check if array contain specific string

1 Answer 1

8 Comments

Your Answer

Linked

Hot Network Questions

Collectives™ on Stack Overflow

1 Answer 1

8 Comments

Your Answer

Sign up or log in

Post as a guest

Linked

Related