shuffle

问题 Closed. This question is not reproducible or was caused by typos. It is not currently accepting answers. Want to improve this question? Update the question so it's on-topic for Stack Overflow. Closed 6 years ago . Improve this question I've got some list of lists and it values can be empty [] or NoneType lst = [[[]], [1, None], 2, [[], 3], 4] And I need to randomise them. To get [[1, None], 4, 2, [[], 3], [[]]] , for example. But if I use shuffle(lst) I've got an exception: TypeError:

问题 I want to train a neural network using backpropagation, and I have a data set like this: Should I shuffle the input data? 回答1: Yes, and it should be shuffled at each iteration, e.g. quote from {1}: As for any stochastic gradient descent method (including the mini-batch case), it is important for efficiency of the estimator that each example or minibatch be sampled approximately independently. Because random access to memory (or even worse, to disk) is expensive, a good approximation, called

问题 This is my code: import java.util.ArrayDeque; import java.util.Collections; import java.util.Deque; import java.util.List; public class ArrayDequeDemo { public static void main(String[] args) { // create an empty array deque with an initial capacity Deque<Integer> deque = new ArrayDeque<Integer>(8); // use add() method to add elements in the deque deque.add(15); deque.add(30); deque.add(20); deque.add(18); // let us print all the elements available in deque for (Integer number : deque) {

问题 There is an array with names, for example: $donalds_nephews = array('Huey', 'Dewey', 'Louie'); array ( [0] => Huey [1] => Dewey [2] => Louie ) I want to shuffle this array, but ensure that no value of the original array has the same key as the shuffled one. $donalds_nephews_shuffled = shuffle($donalds_nephews); This could result in 6 possible permutations: Huey , Dewey, Louie Huey , Louie, Dewey Dewey, Louie, Huey Dewey, Huey, Louie Louie, Dewey , Huey Louie, Huey, Dewey 1st, 2nd, 4th and 5th

问题 This question already has answers here : Simple method to shuffle the elements of an array in BASH shell? (3 answers) Closed 2 years ago . Given an array of elements (servers), how do I shuffle the array to obtain a random new array ? inarray=("serverA" "serverB" "serverC") outarray=($(randomize_func ${inarray[@]}) echo ${outarray[@]} serverB serverC serverA There is a command shuf (man page) but it does not exist on every linux. This is my first attempt to post a self-answered question

问题 I'm new to C, I am trying to randomize 16 cards. In the longer comments I wrote something that I don't have much clear... Btw this is the code: #include <stdio.h> #include <stdlib.h> #include <time.h> #define FACES 4 #define SUITS 4 void shuffle(char *wFace[], char *wSuit[], char *wMixed[][20]); // prototype size_t checker(char *wwMixed[][20], size_t current); // prototype int main(){ char *face[] = {"Jack", "Queen", "King", "Ace"}; char *suit[] = {"Hearts", "Spades", "Diamonds", "Clubs"};

问题 I'm new to C, I am trying to randomize 16 cards. In the longer comments I wrote something that I don't have much clear... Btw this is the code: #include <stdio.h> #include <stdlib.h> #include <time.h> #define FACES 4 #define SUITS 4 void shuffle(char *wFace[], char *wSuit[], char *wMixed[][20]); // prototype size_t checker(char *wwMixed[][20], size_t current); // prototype int main(){ char *face[] = {"Jack", "Queen", "King", "Ace"}; char *suit[] = {"Hearts", "Spades", "Diamonds", "Clubs"};

问题 I was asked this in an interview today, and am starting to believe it is not solvable. Given a sorted array of size n , select k elements in the array, and reshuffle them back into the array, resulting in a new "nk-sorted" array. Find the k (or less) elements that have moved in that new array. Here is (Python) code that creates such arrays, but I don't care about language for this. import numpy as np def __generate_unsorted_array(size, is_integer=False, max_int_value=100000): return np.random

来源： https://stackoverflow.com/questions/41758786/how-to-un-shuffle-data

来源： https://stackoverflow.com/questions/41758786/how-to-un-shuffle-data