我使用larval进行数据库查询。
QUERY：
if(Request::ajax()) {
//On récupère l'ensemble des genres des séries visionnées par l'utilisateur
$genre_user = DB::table('genres')->select('genres.name')
->join('seriesgenres', 'genres.id', '=', 'seriesgenres.genre_id')
->join('series', 'seriesgenres.series_id', '=', 'series.id')
->join('usersseries', 'series.id', '=', 'usersseries.serie_id')
->where('usersseries.user_id', '=', Auth::user()->id)->get();
print_r($genre_user);die;
}
在此查询之后我有这个数组
Illuminate\Support\Collection Object
(
[items:protected] => Array
(
[0] => stdClass Object
(
[name] => Drama
)
[1] => stdClass Object
(
[name] => Action
)
[2] => stdClass Object
(
[name] => Crime
)
[3] => stdClass Object
(
[name] => Drama
)
[4] => stdClass Object
(
[name] => Action & Adventure
)
[5] => stdClass Object
(
[name] => Drama
)
)
)
我想计算这个数组中每个值的数量。 要做到这一点，我知道array_count_values（）函数，但它不能在我的结果数组上工作。问题来自这条线：
$counts = array_count_values($genre_user);
答案 0 :(得分：2)
你不能这样做。功能array_count_values仅适用于integer或E_WARNING：
为每个非字符串或整数的元素抛出
$finalItems = array(); // Loop through the items of the object and push the names into the array. // ... Logic ... // And finally do: array_count_values($finalItems);。
对于像这样的复杂对象，您需要采用不同的方法。由于您的PHP不输出警告消息，因此不会显示它。如果你愿意，你可以做一些改造。
import java.awt.Graphics;
import java.awt.Image;
import java.awt.event.*;
import java.util.ArrayList;
import java.util.List;
import java.util.Scanner;
import javax.swing.*;
public class Main extends JPanel {
private static Image white;
private static Image black;
private static Image finish;
private static Image player;
private static int x = 1;
private static int y = 1;
private String matrix[][];
public Main() {
addKeyListener(new Keys());
setFocusable(true);
}
public static String[][] load(String input) {
List<String[]> rows = new ArrayList<>();
try (Scanner scanner = new Scanner(input)) {
while (scanner.hasNextLine()) {
String line = scanner.nextLine();
String[] cols = new String[line.length()];
for (int i = 0; i < cols.length; i++) {
cols[i] = line.substring(i, i + 1);
}
rows.add(cols);
}
}
return rows.toArray(new String[rows.size()][]);
}
public static JFrame buildFrame() {
JFrame frame = new JFrame("Labyrinth Game");
frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
frame.setSize(900, 950);
frame.setLocationRelativeTo(null);
frame.setVisible(true);
return frame;
}
public void moveUp() {
x += 0;
y += -1;
}
public void moveLeft() {
x += -1;
y += 0;
}
public void moveDown() {
x += 0;
y += 1;
}
public void moveRight() {
x += 1;
y += 0;
}
public class Keys extends KeyAdapter {
@Override
public void keyPressed(KeyEvent e) {
int keycode = e.getKeyCode();
// repaint();
if (keycode == KeyEvent.VK_W) {
if (!matrix[getX()][getY() - 1].equals("1")) {
moveUp();
}
}
if (keycode == KeyEvent.VK_A) {
if (!matrix[getX() - 1][getY()].equals("1")) {
moveLeft();
}
}
if (keycode == KeyEvent.VK_S) {
if (!matrix[getX()][getY() + 1].equals("1")) {
moveDown();
}
}
if (keycode == KeyEvent.VK_D) {
if (!matrix[getX() + 1][getY()].equals("1")) {
moveRight();
}
}
}
@Override
public void keyReleased(KeyEvent event) {
}
}
public static void main(String[] args) {
String input = "1111111111111111111111111111111111111111111\n"
+ "1000000010001000001000000010000000100000001\n"
+ "1010111010101010101111101011111010111111101\n"
+ "1010001010100010100000001010000010000010001\n"
+ "1011101010111110101111111010111111111010111\n"
+ "1000101010100000101000001000100010000010001\n"
+ "1011101011101011111011101111111010111110101\n"
+ "1010001000001010000010100000001010000010101\n"
+ "1010111111111010111110111111101011111011101\n"
+ "1010100000100010100000000000101000000000101\n"
+ "1110101111101110111110111011101011111110101\n"
+ "1000100000000010000010100010001000100010001\n"
+ "1011111111111111111011101010111111101011101\n"
+ "1000000000000000100010001010000000001010001\n"
+ "1011111111111011101110111011111111111010111\n"
+ "1000100010001000001010001000100000001010101\n"
+ "1110101011101111111010101110111110111010101\n"
+ "1000101010001000100000101000100000100010001\n"
+ "1011101010111010101111101011101110101111111\n"
+ "1000001010000010000000101000001000100010001\n"
+ "1111111011111110111111101111111011111010101\n"
+ "1000001010000010100010001000000010000010101\n"
+ "1011111010111011101010111011111110101110101\n"
+ "1010000010001010001010001000100000101010101\n"
+ "1010111111101010111011101111101111101011101\n"
+ "1000100000001010101010001000100010101000101\n"
+ "1011111011111010101010111010111010101011101\n"
+ "1010000010001000101010000010001010001000001\n"
+ "1010101110101111101011101111101011111010101\n"
+ "1010101000101000001000101000001000000010101\n"
+ "1011101011111010111110111011101111111110111\n"
+ "1000001000000010000000000010000000000010021\n"
+ "1111111111111111111111111111111111111111111\n";
String[][] matrix = load(input);
JFrame frame = buildFrame();
ImageIcon img = new ImageIcon("C:/Users/Desktop/black20.png");
black = img.getImage();
img = new ImageIcon("C:/Users/Desktop/gri20.png");
white = img.getImage();
img = new ImageIcon("C:/Users/Desktop/finish20.png");
finish = img.getImage();
img = new ImageIcon("C:/Users/Desktop/smiley20.png");
player = img.getImage();
// frame.add(new Player());
JPanel pane = new JPanel() {
@Override
public void paint(Graphics g) {
super.paint(g);
for (int i = 0; i < matrix.length; i++) {
for (int j = 0; j < matrix[0].length; j++) {
if (matrix[i][j].equals("1")) {
g.drawImage(black, i * 20, j * 20, null);
}
if (matrix[i][j].equals("0")) {
g.drawImage(white, i * 20, j * 20, null);
}
if (matrix[i][j].equals("2")) {
g.drawImage(finish, i * 20, j * 20, null);
}
}
}
g.drawImage(player, x * 20, y * 20, null);
}
};
frame.add(pane);
frame.add(new Main());
}
}