Here’s a function that prints the area of a geometric shape, and the function takes the type as parameter that can calculate the area of the shape, such as Circle, Triangle, Square, and it needs to use generics and generic constraints.

Here’s a function that calculates the sum of a collection of u32 integers, where the parameter type is &[u32] and the return type is Option. If an overflow occurs, the function should return None.

Here’s a function that takes a string slice as an input and returns a string slice that contains the first word of the input string. The function uses byte manipulation to search for the first space character in the input string, which indicates the end of the first word. If no space character is found,

Here’s an Implement a trait for an enum of traffic lights, where the trait includes a method that returns the duration of each light, and each light has a different duration.

It refers to the act of using the map method with an Option type in Rust. In Rust, an Option is an enum type that represents the presence or absence of a value. It has two variants: Some(value) and None. The Some variant contains a value of any type, while the None variant represents the

In Rust, you can implement methods for an enum by defining a block of code within the impl block for the enum. The syntax for implementing methods for an enum is the same as for implementing methods for a struct or a trait. https://play.rust-lang.org/ is an online platform that allows users to write, compile, and

If you have a main function in a rust (.rs) file and you can run it from the command line using the Rust compiler, rustc. To compile the file, open a terminal and navigate to the directory where the file is located, and then run the following command: rustc filename.rs (replace filename.rs with the actual

We can simulate a private network by running two substrate nodes on a single local computer using predefined accounts that are named alice and bob by following this tutorial. When the first blockchain node starts successfully, you should see output similar to this: After you start the second node, the nodes should connect to each other as peers

To stop the local substrate node:

After your node compiles, you are ready to start the local substrate node: