foreach

问题 I run a simulation using foreach and doParallel and struggling with random numbers (named random in the code). In a nutshell: I simulate a football league, randomly generating winners of all the matches and corresponding results. In dt_base no match was played, in dt_ex1 and dt_ex2 results of 4 matches are known already. All unknown results should be simulated. In the League Simulation Code at the bottom of this post I set 1000 simulations, split into 100 chunks (the forloop is used to send

问题 I have an array like this: $a = array( 0 => array('type' => 'bar', 'image' => 'a.jpg'), 1 => array('type' => 'food', 'image' => 'b.jpg'), 2 => array('type' => 'bar', 'image' => 'c.jpg'), 3 => array('type' => 'default', 'image' => 'd.jpg'), 4 => array('type' => 'food', 'image' => 'e.jpg'), 5 => array('type' => 'food', 'image' => 'f.jpg'), 6 => array('type' => 'food', 'image' => 'h.jpg') ) How do I figure out unique type values (which would be food, bar and default)? I could iterate through the

问题 I have an array like this: $a = array( 0 => array('type' => 'bar', 'image' => 'a.jpg'), 1 => array('type' => 'food', 'image' => 'b.jpg'), 2 => array('type' => 'bar', 'image' => 'c.jpg'), 3 => array('type' => 'default', 'image' => 'd.jpg'), 4 => array('type' => 'food', 'image' => 'e.jpg'), 5 => array('type' => 'food', 'image' => 'f.jpg'), 6 => array('type' => 'food', 'image' => 'h.jpg') ) How do I figure out unique type values (which would be food, bar and default)? I could iterate through the

问题 My problem is that i have (in SwiftUI) a ScrollView with an foreach inside. Know when the foreach loads all of my entries i want that the last entry is focused. I did some google research, but i didn't find any answer. ScrollView { VStack { ForEach (0..<self.entries.count) { index in Group { Text(self.entries[index].getName()) } } } } 回答1: Solution for iOS14 with ScrollViewReader in iOS14 SwiftUI gains a new ability. To be able to scroll in a ScrollView up to a particular location. There is a

问题 My problem is that i have (in SwiftUI) a ScrollView with an foreach inside. Know when the foreach loads all of my entries i want that the last entry is focused. I did some google research, but i didn't find any answer. ScrollView { VStack { ForEach (0..<self.entries.count) { index in Group { Text(self.entries[index].getName()) } } } } 回答1: Solution for iOS14 with ScrollViewReader in iOS14 SwiftUI gains a new ability. To be able to scroll in a ScrollView up to a particular location. There is a

问题 My problem is that i have (in SwiftUI) a ScrollView with an foreach inside. Know when the foreach loads all of my entries i want that the last entry is focused. I did some google research, but i didn't find any answer. ScrollView { VStack { ForEach (0..<self.entries.count) { index in Group { Text(self.entries[index].getName()) } } } } 回答1: Solution for iOS14 with ScrollViewReader in iOS14 SwiftUI gains a new ability. To be able to scroll in a ScrollView up to a particular location. There is a

问题 I have a problem when access data who has relationship. Below this syntax is work properly: $student = \App\StudentRegistrars::find($id); foreach($student->father_registrars as $getFatherData) { $fatherID = $getFatherData->id; $specificFather = \App\FatherRegistrars::where('id', $fatherID); $specificFather->update(['status' => 'Pending']); //count qualified students who have father with id $fatherID $getSelectedStudent = \App\StudentRegistrars::where('status', 'Qualified')->whereHas('father

问题 This question already has answers here : Is there a function to extract a 'column' from an array in PHP? (12 answers) Closed 3 years ago . I have an array: Array ( [0] => Array ( [0] => Pen [1] => Apple ) [1] => Array ( [0] => Oooo [1] => Pineapple pen ) How I can get a first elements of each array? For example: Pen Oooo It's my function $parameters = array('wiki_1', 'wiki_2', 'wiki_3', 'wiki_4','wiki_5' ,'wiki_6', 'wiki_7', 'wiki_8', 'wiki_9', 'wiki_10', 'wiki_11', 'wiki_12'); function wiki

问题 I was recommended to use a List<JLabel> list = new ArrayList<class> to collect and later remove a number of unspecific JLabel images from my JPanel private List<JLabel> cardImages = new ArrayList<JLabel>(); public void addCardImage(BufferedImage img, boolean playerCard) { JLabel imgLabel = new JLabel(); ImageIcon icon; icon = new ImageIcon(img); imgLabel.setIcon(icon); cardImages.add(imgLabel); if (playerCard) pCardPanel.add(imgLabel); else dCardPanel.add(imgLabel); display.pack(); } private

问题 I was reading the Mozilla Documentation, but I don't understand the this which is passed into the function. Could anyone explain more about the usage of the this argument here? function Counter() { this.sum = 0; this.count = 0; } Counter.prototype.add = function(array) { array.forEach(function(entry) { this.sum += entry; ++this.count; }, this); //Why is this passed here? }; var obj = new Counter(); obj.add([2, 5, 9]); obj.count // 3 obj.sum // 16 回答1: Per the Mozilla documentation: thisArg