Issue Sometime in VB.net i have something like: For Each El in Collection Write(El) Next But if i need the index number, i have to change it to For I = 0 To Collection.Count() – 1 Write(I & ” =
Continue readingTag: collections
[SOLVED] does swift's string type conform to collection protocol?
Issue In the swift programming language book, it states You can use the startIndex and endIndex properties and the index(before:), index(after:), and index(_:offsetBy:) methods on any type that conforms to the Collection protocol. This includes String, as shown here, as
Continue reading[SOLVED] How to tell whether a collection exists in MongoDB using Mongoid?
Issue Since Mongoid.master.collection() returns a collection even if the collection doesn’t exist, we can use coll = Mongoid.master.collection(‘analyticsCachedResult’) if coll.count == 0 # […] end to test if it is an empty collection. Another method is to loop through Mongoid.master.collections.each
Continue reading[SOLVED] How do I specify options in my f.collections_select menu that are not based off objects?
Issue With Rails 5, how do I hard-code option and values for my select menu? These options aren’t based off objects. Otherwise I could do <%= f.collection_select :my_field, @my_objects,:id,:name,{:prompt => “Select Object”} %> Instead, I want the options to be
Continue reading[SOLVED] How to determine if a list of string contains null or empty elements
Issue In Java, I have the following method: public String normalizeList(List<String> keys) { // … } I want to check that keys: Is not null itself; and Is not empty (size() == 0); and Does not have any String elements
Continue reading[SOLVED] Chaincall for each element in list
Issue Is exist elegant way to call function on every element in list to tie with next till the end? For example I have: val list = listOf(1,5,3,4) fun Int.foo(next: Int) = //some logic I want to generate this expression:
Continue reading[SOLVED] How to move specific item in array list to the first item
Issue For example : A list A B C D E Given C , Switch to C A B D E Notice that the array size will change, some items may removed in run times Collections.swap(url, url.indexOf(itemToMove), 0); This statement
Continue reading[SOLVED] Using a switch case statement with a List in c#
Issue I am having trouble getting a Switch Case statement to work while switching on a list List<int> Test = new List<int>(){9, 6, 5}; switch(Test) { case new List<int>(){9, 6, 5}: Console.Write("Yes"); break; case new List<int>(){2, 4, 8}: Console.Write("No"); break;
Continue reading[SOLVED] Remove Objects from a List based on their ID and collect Objects that have been removed to another List
Issue I want to remove from a list of Employee (list1) objects that are not present in another list of Employee (list2) by their id and add removed objects from list1 into another list (list3) using Java 8. Example :
Continue reading[SOLVED] Java : How to convert from Set to List while specifying first element of List
Issue static void main(String[] args) { List<Foo> fooList = new LinkedList<>(); Set<Foo> fooSet = new HashSet<>(); Foo element1 = new Foo("Element1"); Foo element2 = new Foo("Element2"); Foo element3 = new Foo("Element3"); fooSet.add(element1); fooSet.add(element2); fooSet.add(element3); CollectionUtils.addAll(fooList, fooSet); } Is there a
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