If you have an NSMutableArray, how do you shuffle the elements randomly? (I have my own answer for this, which is posted below, but I’m new to Cocoa and I’m interested to know if there is a better way.) Update: As noted by @Mukesh, as of iOS 10+ and macOS 10.12+, there is an -[NSMutableArray … Read more
I need to randomly shuffle the following Array: int[] solutionArray = {1, 2, 3, 4, 5, 6, 6, 5, 4, 3, 2, 1}; Is there any function to do that? 31 Answers 31 Using Collections to shuffle an array of primitive types is a bit of an overkill… It is simple enough to implement the … Read more
I have two numpy arrays of different shapes, but with the same length (leading dimension). I want to shuffle each of them, such that corresponding elements continue to correspond — i.e. shuffle them in unison with respect to their leading indices. This code works, and illustrates my goals: def shuffle_in_unison(a, b): assert len(a) == len(b) … Read more
I want to shuffle the lines of a text file randomly and create a new file. The file may have several thousands of lines. How can I do that with cat, awk, cut, etc? 19 Answers 19
How do I randomize or shuffle the elements within an array in Swift? For example, if my array consists of 52 playing cards, I want to shuffle the array in order to shuffle the deck. 25 Answers 25
What’s the easiest way to shuffle an array with python? 11 Answers 11
I have the following DataFrame: Col1 Col2 Col3 Type 0 1 2 3 1 1 4 5 6 1 … 20 7 8 9 2 21 10 11 12 2 … 45 13 14 15 3 46 16 17 18 3 … The DataFrame is read from a CSV file. All rows which have Type … Read more
I have a list of objects and I want to shuffle them. I thought I could use the random.shuffle method, but this seems to fail when the list is of objects. Is there a method for shuffling objects or another way around this? import random class A: foo = “bar” a1 = a() a2 = … Read more
I have an array like this: var arr1 = [“a”, “b”, “c”, “d”]; How can I randomize / shuffle it? 6 65
Using Collections to shuffle an array of primitive types is a bit of an overkill… It is simple enough to implement the function yourself, using for example the Fisher–Yates shuffle: import java.util.*; import java.util.concurrent.ThreadLocalRandom; class Test { public static void main(String args[]) { int[] solutionArray = { 1, 2, 3, 4, 5, 6, 16, 15, 14, … Read more
