duplicates

I have a Ruby array which contains duplicate elements. array = [1,2,2,1,4,4,5,6,7,8,5,6] How can I remove all the duplicate elements from this array while retaining all unique elements without using for-loops and iteration? array = array.uniq The uniq method removes all duplicate elements and retains all unique elements in the array. One of many beauties of Ruby language. You can also return the intersection. a = [1,1,2,3] a & a This will also delete duplicates. You can remove the duplicate elements with the uniq method: array.uniq # => [1, 2, 4, 5, 6, 7, 8] What might also be useful to know

I'm trying to write a small program that prints out distinct numbers in an array. For example if a user enters 1,1,3,5,7,4,3 the program will only print out 1,3,5,7,4. I'm getting an error on the else if line in the function checkDuplicate . Here's my code so far: import javax.swing.JOptionPane; public static void main(String[] args) { int[] array = new int[10]; for (int i=0; i<array.length;i++) { array[i] = Integer.parseInt(JOptionPane.showInputDialog("Please enter" + "an integer:")); } checkDuplicate (array); } public static int checkDuplicate(int array []) { for (int i = 0; i < array.length

Let's say that I have a panel with like... 3 controls in it. I may end up adding more controls to it or changing the positioning within that panel. When the program starts, I will programmatically HIDE the control. Eventually, the user can click a button that will create a duplicate of the original panel to populate an area on the form. The button should have the option for another click eventually, meaning that multiple instances of these can come about to populate this area. Remember that these controls may have text labels within them that can be individually set or altered later on,

This question already has an answer here: Get all unique values in a JavaScript array (remove duplicates) 74 answers I have string values that contain a list of items separated with a comma, e.g. the value could be val1,val2,val3,val1,val4,val3,val2,val5 . Is there an easy way I can remove all duplicates from such a string so that each value only appears once within the string ? E.g. in the above example I would like to get val1,val2,val3,val4,val5 instead. Many thanks in advance, Tim. Make an array by split string and use unique() try like this: data = "val1,val2,val3,val4,val5"; arr = $

I want to select from the following table all the rows which have similar values in the fname column as the first in their order. IOW from this table I want to retrieve rows with ids 2,5 and 7 (because " anna " comes after " anna ", and " michaela " and " michaal " come after " michael "). +----+------------+----------+ | id | fname | lname | +----+------------+----------+ | 1 | anna | milski | | 2 | anna | nguyen | | 3 | michael | michaels | | 4 | james | bond | | 5 | michaela | king | | 6 | bruce | smart | | 7 | michaal | hardy | +----+------------+----------+ What I have so far is this: