St Louis
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9 min readDependency injection is a design pattern used in software development to decouple classes and their dependencies. In Kotlin, implementing dependency injection can facilitate modular and testable code by reducing tight coupling between components.To implement dependency injection in Kotlin, you typically follow these steps:Identify the dependencies: First, determine the objects or services that your class requires to function properly.
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5 min readWhen working with Rust macros, it is often necessary to parse single tokens for further processing. Parsing single tokens within macros can be challenging due to the token-based nature of macros. Here are a few techniques to parse single tokens in Rust macros:Using ident for Identifiers: To parse a single identifier token, you can use the ident macro keyword.
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5 min readRetrofit is a widely used networking library in Android development, and it provides a convenient way to consume APIs and perform network operations in your Kotlin projects. Here is a brief explanation of how to perform network operations using Retrofit in Kotlin:Import the Retrofit library: Add the Retrofit dependency to your project's build.gradle file. Define the API interface: Create an interface that represents your API endpoints.
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5 min readTo check if a string contains a negative number in Rust, you can use regular expressions or string manipulation methods. Here is an approach using regular expressions:Import the regex crate by adding the following line to your code: use regex::Regex; Create a regular expression pattern to match negative numbers. For example, the pattern ^[-]?\d+$ matches numbers that may start with a - (minus sign) followed by one or more digits. let pattern = Regex::new(r"^[-]?\d+$").
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4 min readTo set up a basic Android app using Kotlin, follow these steps:Install Android Studio: Download and install the latest version of Android Studio from the official website. Create a new project: Launch Android Studio and select "Start a new Android Studio project." Choose an application name, domain, and select the target API level. Choose an activity: Select "Empty Activity" or any other activity template that suits your needs. Click "Next" and choose the activity name.
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6 min readTo read and unread Unicode characters from stdin in Rust, you need to use the std::io::Read trait. This trait provides the read method which allows reading bytes from an input source. However, Rust represents Unicode characters as UTF-8 encoded bytes by default, so you would need to convert them into proper Unicode characters.
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6 min readThe Android Kotlin Extensions, also known as KTX, is a library that provides a set of Kotlin extensions for Android development. It aims to simplify Android development by offering concise and idiomatic Kotlin code for common Android tasks.To use the Android Kotlin Extensions library:Add the library to your project: To start using KTX, include the following dependency in your app-level build.gradle file: implementation 'androidx.
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9 min readTo implement a static cache in Rust, you can follow these steps:Define a struct to represent the cache. This struct will typically have fields to store the cached values, such as a HashMap or a Vec, depending on your requirements. Implement methods for the struct to interact with the cache. This can include methods like insert() to add values to the cache, get() to retrieve values from the cache, and delete() to remove values from the cache.
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7 min readTo implement Parcelable in Kotlin for Android development, follow these steps:Open your Kotlin data class or model class that you want to make Parcelable. Add the Parcelable interface to your class declaration: data class ExampleModel(...) : Parcelable { // class implementation } Implement the required Parcelable methods: describeContents() and writeToParcel(). Use the following code snippet as a reference and modify it according to your class attributes: data class ExampleModel(...
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5 min readTo check if a directory is empty in Rust, you can use the std::fs module from the Rust standard library. Here is an example of how you can do it: use std::fs; fn is_directory_empty(dir: &str) -> bool { if let Ok(entries) = fs::read_dir(dir) { return entries.count() == 0; } false } fn main() { let dir_path = "/path/to/directory"; if is_directory_empty(dir_path) { println!("Directory is empty."); } else { println.
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5 min readIn Kotlin, the "also" and "takeIf" functions are useful for performing additional operations on objects or checking a condition before returning a result.The "also" function: The "also" function allows you to perform a side effect or additional operation on an object and then return the original object. It is defined as an extension function on any object. The general syntax is as follows: fun <T> T.