Posts - Page 114 (page 114)
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3 min readTo print SSH output in Rust, you can use the std::process::Command module to execute the SSH command and read its output. Here's an example code snippet: use std::process::Command; fn main() { let output = Command::new("ssh") .args(&["user@host", "ls"]) .output() .expect("Failed to execute command"); if output.status.success() { let stdout = String::from_utf8(output.stdout) .
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6 min readIn Rust, it is not possible to have a struct with a randomly-sized byte array directly inside it. However, you can achieve a similar effect by using a fixed-size array with additional fields to keep track of the actual size of the data in the array.One common approach is to use a fixed-size array along with a separate field to store the actual size of the data.
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5 min readTo disable a sequence in Oracle, you can use the ALTER SEQUENCE statement.First, connect to your Oracle database using a tool like SQL*Plus or SQL Developer. Then, run the following SQL command:ALTER SEQUENCE sequence_name DISABLE;Replace "sequence_name" with the name of the sequence you want to disable. This command will prevent the sequence from generating new values.
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6 min readTo set the origin header for a websocket client in Rust, you can use the Request::header() method provided by the websocket::ClientBuilder crate. This allows you to add custom headers to the websocket client request. To set the origin header specifically, you can do the following: use websocket::ClientBuilder; use std::collections::HashMap; let client = ClientBuilder::new("wss://example.com") // Specify the websocket server URL .header("Origin", "https://example.
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3 min readIn Oracle, exceptions can be handled in a package by using the traditional PL/SQL exception handling mechanism. This involves using the "EXCEPTION" block within the package to catch specific exceptions and handle them accordingly.Exceptions can be raised within the package using the "RAISE" statement. Once an exception is raised, the exception block can be used to handle the exception by providing specific handling logic.
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7 min readIn Rust, the error message "operator cannot be applied to type" occurs when you try to use an operator on a type that does not support it. This typically happens when you are trying to perform an operation, such as addition or subtraction, on types that do not have the necessary traits implemented for that operator.To fix this error, you need to make sure that the types you are operating on have the appropriate traits implemented.
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5 min readTo check if a column already exists in Oracle, you can query the data dictionary views in the Oracle database.
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6 min readTo generate a Rc from a reference to T in Rust, you can use the Rc::clone method. This method creates a new reference-counted pointer to the same underlying data as the original reference. Here's an example: use std::rc::Rc; fn main() { let data = String::from("Hello, Rust!"); let ptr = Rc::new(&data); let cloned_ptr = Rc::clone(&ptr); println!("Original data: {}", *ptr); println.
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7 min readTo implement a trait on an integer type in Rust, you first need to define the trait using the trait keyword followed by the trait name and its methods. Then, you can implement the trait for a specific integer type by using the impl keyword followed by the trait name and the integer type. Inside the impl block, you can define the implementation of the trait methods for that particular integer type. You can then use the methods defined in the trait on instances of the integer type.
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4 min readInvalid identifier errors in Oracle typically occur when you try to reference a table, column, or object that does not exist in the database. To avoid these errors, make sure you double-check the spelling of the identifier in your SQL statements. It's also important to be aware of the scope of your identifiers, as they may not be accessible in certain contexts.
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3 min readTo break out of a loop in Rust and return a value, you can use the break keyword to exit the loop and the return keyword to return a value from the function containing the loop. By combining these two keywords, you can break out of the loop and immediately return a value. Just make sure to place the value you want to return after the return keyword. This way, you can effectively break out of a loop and return a value in Rust.
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5 min readIn Oracle functions, dividing by zero can result in a runtime error. To handle this situation, you can use the NULLIF function in combination with a conditional statement to check if the denominator is zero before performing the division operation. By using NULLIF, you can return a NULL value instead of an error when dividing by zero. This allows you to handle the divide by zero scenario gracefully and continue with the function execution without crashing.