foreach

来源： https://stackoverflow.com/questions/30763564/how-can-i-group-my-array-into-groups-of-3-elements-sort-them-by-the-last-elemen

来源： https://stackoverflow.com/questions/51738684/await-with-array-foreach-containing-async-await

来源： https://stackoverflow.com/questions/63088893/sheet-inside-foreach-doesnt-loop-over-items-swiftui

问题 I'm not able to understand why java 8 has forEach loop and taking the Consumer functional interface as parameter. Even though we can do the same task using traditional for each loop without creating any extra overhead to create a class implements that from Consumer and implements a method and then pass this as reference to the forEach(). Although there is lambda expression to make it short. Q1- why iterable.forEach()? Q2. Where to use it? Q3. which one is faster traditional for each of Java 8

问题 In wooCommerce, I am using the following code to create programmatically a single coupon: $coupon_amount = '20'; $code_value = wp_generate_password( 15, false ); $coupon_code = $code_value; $expiry_date = date('Y-m-d', strtotime('+140 days')); function create_coupon_codes($coupon_amount, $coupon_code, $expiry_date, $email_address) { global $wpdb; $sql = $wpdb->prepare( "SELECT ID FROM $wpdb->posts WHERE post_title = %s AND post_type = 'shop_coupon' AND post_status = 'publish' ORDER BY post

问题 This is my third question on this issue. So far there was no solution that didn't crash. I want to swipe-delete on a List with Toggles. My (simplified) code looks like this: struct Item: Identifiable { var id = UUID() var isOn: Bool } struct ContentView: View { @State var items = [Item(isOn: true) , Item(isOn: false), Item(isOn: false)] var body: some View { NavigationView { List { ForEach(items) {item in Toggle(isOn: self.selectedItem(id: item.id).isOn) {Text("Item")} }.onDelete(perform:

问题 When you have a foreach loop like below, I know that you can change the current element of the array through $array[$key] , but is there also a way to just change it through $value ? foreach($array as $key => $value){ } It's probably really simple, but I'm quite new to PHP so please don't be annoyed by my question :) 回答1: To be able to directly assign values to $value , you want to reference $value by preceding it with & like this: foreach($array as $key => &$value){ $value = 12321; //the

问题 When you have a foreach loop like below, I know that you can change the current element of the array through $array[$key] , but is there also a way to just change it through $value ? foreach($array as $key => $value){ } It's probably really simple, but I'm quite new to PHP so please don't be annoyed by my question :) 回答1: To be able to directly assign values to $value , you want to reference $value by preceding it with & like this: foreach($array as $key => &$value){ $value = 12321; //the

问题 When you have a foreach loop like below, I know that you can change the current element of the array through $array[$key] , but is there also a way to just change it through $value ? foreach($array as $key => $value){ } It's probably really simple, but I'm quite new to PHP so please don't be annoyed by my question :) 回答1: To be able to directly assign values to $value , you want to reference $value by preceding it with & like this: foreach($array as $key => &$value){ $value = 12321; //the

问题 There are countless examples out there for my problem, I know, but I went through a lot of them and can't figure out where my mistake is. I am iterating over an ArrayList(TestSzenario). The class TestSzenario contains a String Variable called name with proper getters and setters. Here's my code: <td><select name="selectSzenario" id="selectSzenario" size="1"> <c:forEach items="<%=testszenario.getSzenariosForSummary() %>" var="szenario"> <option>${szenario.name}</option> </c:forEach></select><