St Louis
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4 min readTo get a Lua table from context in Rust, you can use the mlua crate which provides bindings for interacting with Lua from Rust. Here is a step-by-step guide on how to do it:First, add the mlua dependency to your Cargo.toml file: [dependencies] mlua = "0.5" In your Rust code, import the necessary modules: use mlua::{Lua, Value}; Create a Lua context and load your Lua script: let lua = Lua::new(); let script = r#" -- Lua script code goes here "#; lua.load(script).exec().
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7 min readCoroutines are a powerful tool in Kotlin that allow for asynchronous programming. They provide a way to write asynchronous code in a sequential and readable manner.To use coroutines for asynchronous programming in Kotlin, you need to follow these steps:Set up the Coroutine Scope: Coroutines are executed within a coroutine scope, which manages the lifecycle of all coroutines. You can create a coroutine scope using the CoroutineScope interface.
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7 min readTo statically link Node.js in Rust, you can follow the following steps:Add the nodejs-sys crate as a dependency in your Cargo.toml file: [dependencies] nodejs-sys = "0.
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7 min readTo implement the Singleton pattern in Kotlin, you can follow these steps:Create a class and make its constructor private to prevent direct instantiation. Declare an object within the class, representing the Singleton instance. This object will be lazily initialized, meaning it will be created when it is first accessed. Optionally, you can define properties and methods within the Singleton object, which will be accessible through the Singleton instance.
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7 min readTo call a C function in Rust, you need to use the Foreign Function Interface (FFI) provided by Rust. Here are the steps involved:Define the C function signature: First, you need to declare the C function signature in your Rust code. This includes the function name, return type, and parameter types. For example, if the C function is defined as int add_numbers(int a, int b), your Rust code should include a declaration like extern "C" fn add_numbers(a: i32, b: i32) -> i32;.
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6 min readIn Kotlin, the let and run functions are useful tools for simplifying and enhancing your code. While both functions have some similarities, they differ in the way they are used and their intended purposes.The let function is used to execute a block of code on a non-null object and allows you to perform operations on that object within the block. It is particularly handy when you want to avoid null checks and ensure safe operations by executing code only if the object is not null.
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3 min readTo convert a char** to a Vec<String> in Rust, you can use the following steps:Collect the C-style strings into CStr slices: use std::ffi::CStr; let c_strs: Vec<&CStr> = (0..size).map(|i| { unsafe { CStr::from_ptr(char_double_ptr[i]) } }).collect(); Convert CStr slices to Rust String objects: let rust_strings: Vec<String> = c_strs.iter().map(|&c_str| { c_str.to_string_lossy().to_string() }).collect(); Here, size is the size of the char** array.
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8 min readIn Kotlin, data classes provide a convenient way to define classes that are primarily used to hold data. They are automatically equipped with useful functionalities like getter and setter methods, toString(), equals(), hashCode(), and copy() methods. Working with data classes in Kotlin involves the following steps:Declaring a Data Class: To declare a data class, use the "data" keyword before the class declaration.
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6 min readIn Rust, the term "where for" does not have a specific or unique meaning on its own. Instead, it is part of the syntax used in generics to specify constraints and requirements for types.When declaring generic functions or structs in Rust, you can use the "where" clause to add extra conditions or bounds on the generic type parameters. This allows you to restrict the types that can be used with the generic code.
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4 min readString interpolation in Kotlin allows you to embed expressions inside a string. This helps create dynamic strings by evaluating and substituting the expressions with their values. To perform string interpolation in Kotlin, you can utilize the following options:Using the $ character: You can use the $ character followed by the expression to interpolate it directly into the string. For example: val name = "John" val age = 25 val message = "My name is $name and I'm $age years old.
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7 min readThe "apply" function in Kotlin is a higher-order function that allows you to modify an object by applying a set of operations to it. It is often used for configuring an object after its initialization or for creating a fluent interface.To use the "apply" function, you first select the object you want to modify and follow it with the "apply" function call using the dot notation.