Posts (page 385)
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9 min readTo generate a secret key using Dart programming language, you can follow the steps mentioned below:Import the dart:convert library to access the necessary encoding functionality: import 'dart:convert'; Generate a random list or string of bytes using the SecureRandom class from the dart:math library: import 'dart:math'; import 'dart:typed_data'; Uint8List generateRandomBytes(int length) { final random = Random.secure(); final values = List.
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7 min readTo count the number of instances of a class in Dart, you can use a static variable or a class-level counter. Here's how you can do it:Create a static variable within the class that you want to count instances of. For example, let's assume we have a class named "MyClass". class MyClass { static int instanceCount = 0; MyClass() { instanceCount++; } } Define a constructor for the class that increments the static variable each time an instance of the class is created.
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6 min readTo insert an element into an existing object in Dart, you can follow these steps:Identify the object you want to insert the element into. Let's say you have a list as an example object. Determine the index at which you want to insert the element. The index represents the position in the object where you want to insert the element. It could be at the beginning, in the middle, or at the end of the object. Use the insert() method to insert the element into the object.
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4 min readTo reverse map values in Dart, you can follow these steps:Create a map with key-value pairs.Declare an empty map to store the reversed values.Iterate over the original map using a loop or the forEach method.For each key-value pair in the original map: Extract the value and the key. Check if the value already exists in the reversed map. If it doesn't exist, add a new entry to the reversed map with the value as the key and the original key as the value.
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4 min readIn Dart, you can determine if a customer object is null or not by using the null-aware operator called the "?.", or by using conditional statements.Using the null-aware operator: The null-aware operator "?." allows you to safely access properties or call methods on an object that might be null. Here's an example: Customer? customer; // declaring a nullable customer object if (customer?.name != null) { print('Customer name: ${customer.
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6 min readDarts is a popular game that involves throwing small projectiles, called darts, at a circular board called a dartboard. The game is often played in pubs, bars, and tournaments all over the world. While the external objective of darts is simple, which is to score points by hitting specific areas on the board, there is a rich internal world of strategy and skill that awaits players.Firstly, precision is a key component of successful dart throwing.
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6 min readTo generate random characters in Dart, you can make use of the built-in Random class along with the ASCII values of characters.First, import the dart:math library to access the Random class: import 'dart:math'; Then, create an instance of the Random class: Random random = Random(); To generate a random character, you can use the nextInt() method along with ASCII values. Here's an example to generate a random lowercase character: int nextCharCode = random.nextInt(26) + 'a'.
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4 min readConverting a hex color value to an RGB color representation involves a few steps in Dart:Remove the "#" symbol from the start of the hex color string.Separate the hex color string into three parts - red, green, and blue - each consisting of two characters.Parse each part as a hexadecimal value using the int.parse() function.Create a Color object using the parsed red, green, and blue values. The Color class is available in the Flutter framework.
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5 min readBreaking from the middle of the generator in a dart involves a specific technique and approach to achieve accuracy and precision. Here are the steps to break effectively:Proper Grip: Hold the dart with a firm but relaxed grip. The dart should rest between your thumb and index finger, with the other fingers providing support and stability. Stance: Stand with your dominant foot slightly forward, creating a stable base. Maintain a balanced and relaxed stance throughout the throw.
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5 min readTo compare dates in Dart, you can use the DateTime class which provides various methods and properties for working with dates and times.Creating Date Objects: To compare dates, you need to first create DateTime objects representing the dates you want to compare. You can create a DateTime object using the following constructors: a. Using the named constructor DateTime.now() to get the current date and time. b.
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6 min readTo sort objects by date in Dart, you can follow the steps below:Create a class for your objects that includes a DateTime property representing the date. class MyObject { DateTime date; // other properties and methods } Create a list of your objects. List<MyObject> objects = [ MyObject(date: DateTime(2022, 1, 15)), MyObject(date: DateTime(2022, 1, 10)), MyObject(date: DateTime(2022, 1, 20)), ]; Use the sort() method of the list to sort the objects based on the DateTime property.
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7 min readTo transform XML using XSL in Dart, you can follow these steps:First, make sure you have the necessary packages installed in your Dart project. You will need the "xml" and "xml2json" packages to parse and transform XML. You can include them in your project's pubspec.yaml file. Import the required libraries in your Dart file. You will need to import dart:convert for JSON encoding and decoding, and package:xml/xml.dart for XML parsing and manipulation.