If item in loops exists more than once remove issue

Question

[myItem enumerateObjectsUsingBlock:^(id obj, NSUInteger idx, BOOL *stop) {
    if (obj isEqualToString:@"someString" > 1) { // not correct syntax
        self.someLabel.text = [self.someLabel.text stringByAppendingString:[NSString stringWithFormat:@"\t\t%@\n", obj]];
    }
}];

I am trying to check if obj is equal to "someString". And if "someString" is displayed more than one I would like to remove it from the obj.

"itemOne"

"otherItem"

"someString"

"someString" <- remove

I am having issues dynamically doing this within the loop in objective c.

Basically a duplicate of this: http://stackoverflow.com/q/1025674/558933 . Check out some of the answers. — Robotic Cat, Sep 09 '14 at 13:24
possible duplicate of [removing duplicates from array in objective c](http://stackoverflow.com/questions/4007427/removing-duplicates-from-array-in-objective-c) — Dehli, Sep 09 '14 at 13:26
Order does not matter, I used @Vidhyanand900 solution below and it worked well. — user3662516, Sep 09 '14 at 14:25

score 0 · Answer 1 · answered Sep 09 '14 at 13:21

0

An easier solution is to convert the array to an ordered set and then back to an array. This will remove duplicates.

answered Sep 09 '14 at 13:21

CrimsonChris

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score 0 · Answer 2 · answered Sep 09 '14 at 13:24

0

try like this,

UniqArray = [CurrentArray valueForKeyPath:@"@distinctUnionOfObjects.self"];

or

NSArray *UniqArray = [[NSOrderedSet orderedSetWithArray:CurrentArray]allObjects];

or

NSArray *UniqArray = [[NSSet setWithArray:CurrentArray] allObjects]

answered Sep 09 '14 at 13:24

Balu

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score 0 · Answer 3 · answered Sep 09 '14 at 13:25

You can convert it to an ordered set, which removes the duplicates, then convert it back to an array.

// remove duplicates
NSOrderedSet *myItemSet = [NSOrderedSet orderedSetWithArray:myItem];

// convert it back to NSArray
NSArray *myItemArrayWithoutDuplicates = myItemSet.array;

Vidhyanand · Answer 4 · 2014-09-09T13:51:06.120

You can use continue statement for displaying the data without dublicates

[myItem enumerateObjectsUsingBlock:^(id obj, NSUInteger idx, BOOL *stop) {
    if ([obj isEqualToString:@"someString"]) { 
        self.someLabel.text = [self.someLabel.text stringByAppendingString:[NSString stringWithFormat:@"\t\t%@\n", obj]];
     continue;
    }
}];

This will exist from current iteration after value assigned in label.

If you want to delete the dublicate objects. If Order of Items does not matter...

NSArray *itemsArray = [[NSSet setWithArray: myItem] allObjects];

If order of items matter..

 NSMutableArray *uniqueItems = [NSMutableArray array];
for (id item in myItem)
    if (![uniqueItems containsObject:item])
        [uniqueItems addObject:item];

Hope it helps you..

That worked well. Thank you! Order did not matter so I used the first one. — user3662516, Sep 09 '14 at 14:24

score 0 · Answer 5 · answered Aug 28 '19 at 18:38

Swift 5

let array = ["itemOne", "otherItem", "someString", "someString", "someString"]

print(array) // "itemOne", "otherItem", "someString", "someString", "someString"]

var set = Set<String>()
for item in array{
    set.insert(item)
}

print(set) // ["otherItem", "someString", "itemOne"]

If item in loops exists more than once remove issue

5 Answers5