Question

我有以下数组。我想使用数组方法而不是循环为该数组结果像[{"dietary_options":"234"},{"dietary_options":"123"}] json_encode。

Array
(
[0] => Array
    (
        [dietary_options] => 
    )

[1] => Array
    (
        [dietary_options] => 
    )

[2] => Array
    (
        [dietary_options] => 
    )

[3] => Array
    (
        [dietary_options] => 
    )

[4] => Array
    (
        [dietary_options] =>234 
    )

[5] => Array
    (
        [dietary_options] => 123
    )

）

Answer 1

简单地使用array_filter是简单的方法

   override func viewDidLoad() {
    super.viewDidLoad()

    var textDatas = ["aaa","bbb","cccccc","ddddddd","ee","ffffff","ggggg","hhhh","iiiiii","jjjjjj","kkkkkk","ll","mmmmm","nnnnnnnn","ooooooooo","ppppppppp","qqqqqqqqqqqq","rrrrrrrr","sssssss","ttttttttt","uuuuuuu","vvvv","wwww","xxxxxx","yyyy","zzzzzzz"]

    textDatas.forEach { (textData) in
        let randomIntX = Int.random(in: 10..<Int(ScreenSize.SCREEN_WIDTH-200))
        let randomIntY = Int.random(in: 50..<Int(ScreenSize.SCREEN_HEIGHT-50))
        let randomIntFontSize = Int.random(in: 10..<40)
        let randomIntLabelRotate = Int.random(in: 1..<3)

        let label = UILabel(frame: CGRect(x: randomIntX, y: randomIntY, width: 200, height: 30))
        label.font = UIFont(name: FONT_AVENIR_HEAVY,
                            size: CGFloat(randomIntFontSize))
        label.textColor = .white
        label.textAlignment = .center
        label.text = textData
        label.sizeToFit()

        if randomIntLabelRotate == 1 {
            label.transform = CGAffineTransform(rotationAngle: -CGFloat.pi / 2)
        }

        self.view.addSubview(label)
    }
}

Answer 2

尝试此代码，

 $data = array(array('dietary_options'=>''),
                  array('dietary_options'=>'one'),
                 array('dietary_options'=>'two'));


$data = array_map('array_filter', $data);
$data = array_values(array_filter($data));
print_r(json_encode($data,true));
// print_r(json_encode(array_filter($data),true));

Answer 3

尝试一下。它可以按您期望的格式工作而不会循环。

$array=array(
array("dietary_options"=>"234"),
array("dietary_options"=>""),
array("dietary_options"=>""),
array("dietary_options"=>"123")
);

$array_data = array_map('array_filter', $array);
$array_data = array_filter($array_data);
$array_data = array_values($array_data);
print_r(json_encode($array_data));

Answer 4

请尝试以下代码。

$data = array(array("dietary_options"=>""),array("dietary_options"=>"789"),array("dietary_options"=>"123456"));
$data = array_filter(array_map('array_filter', $data));

echo json_encode(array_values($data));

Answer 5

这对我来说很好，

print_r(json_encode(array_filter($myArray)));

Answer 6

php array_filter不错的选择。

$data = array(
            array("dietary_options" => ''),
            array("dietary_options" => ''),
            array("dietary_options" => ''),
            array("dietary_options" => 123),
            array("dietary_options" => 234),
        );
return new JsonResponse(array_values(array_filter($data, function($k){
        return !!$k["dietary_options"];
})));

json编码为以下数组

6 个答案: