duplicates

I got the following code: int nnames; String names[]; System.out.print("How many names are you going to save: "); Scanner in = new Scanner(System.in); nnames = in.nextInt(); names = new String[nnames]; for (int i = 0; i < names.length; i++){ System.out.print("Type a name: "); names[i] = in.nextLine(); } And the output for that code is the following: How many names are you going to save:3 Type a name: Type a name: John Doe Type a name: John Lennon Notice how it skipped the first name entry?? It skipped it and went straight for the second name entry. I have tried looking what causes this but I

In java 8, what's the best way to check if a List contains any duplicate? My idea was something like: list.size() != list.stream().distinct().count() Is it the best way? Your code would need to iterate over all elements. If you want to make sure that there are no duplicates simple method like public static <T> boolean areAllUnique(List<T> list){ Set<T> set = new HashSet<>(); for (T t: list){ if (!set.add(t)) return false; } return true; } would be more efficient since it can give you false immediately when first non-unique element would be found. This method could also be rewritten as

I'm .clone -ing a record in rails... new_blerg = Blerg.find(1).clone This record has loads and loads of associations, and those associations even have associations. Is there a way to deep-copy a record and clone it so it is cloned with all of those associations too? Vaughn Draughon You may get some good use out of the Amoeba gem for ActiveRecord 3.2. It supports easy and automatic recursive duplication of has_one , has_many and has_and_belongs_to_many associations, field preprocessing and a highly flexible and powerful configuration DSL that can be applied both to the model and on the fly. be

I want a div to be duplicated when a button is clicked. I though something like this; but it's not working. Can anyone help me? HTML <div id="duplicater"> duplicate EVERYTHING INSIDE THIS DIV </div> JAVASCRIPT function duplicate() { var div = duplicate("div"); div.id = "duplicater"; div.appendChild(duplicate("duplicater")); } Felix Kling You are creating an infinite recursion! function duplicate() { var div = duplicate("div"); The function is calling itself over and over again. Use cloneNode() : HTML: <div id="duplicater0"> duplicate EVERYTHING INSIDE THIS DIV </div> JavaScript: var i = 0;

I have a table with 3 columns like this: +------------+---------------+-------+ | Country_id | country_title | State | +------------+---------------+-------+ There are many records in this table. Some of them have state and some other don't. Now, imagine these records: 1 | Canada | Alberta 2 | Canada | British Columbia 3 | Canada | Manitoba 4 | China | I need to have country names without any duplicate. Actually I need their id and title , What is the best SQL command to make this? I used DISTINCT in the form below but I could not achieve an appropriate result. SELECT DISTINCT title,id FROM