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4 min readTo get the filename of an open std::fs::File in Rust, you can use the file_path() method provided by the std::fs::File struct. This method returns a std::path::PathBuf representing the path to the file that the File instance was opened from. You can then convert this PathBuf into a String using the to_string_lossy() method to get the filename in string format.[rating:0b8e1296-57d4-4b0a-aae7-729a6718baf4]What is the standard way to retrieve the filename of an open file in rust.
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5 min readTo remove n documents in pymongo, you can use the delete_many() method with a filter to specify the criteria for removing documents. This method allows you to remove multiple documents that match the filter criteria at once. Simply provide the filter as a parameter to the delete_many() method and it will remove all documents that match the filter. Make sure to handle any error conditions that may arise during the removal process to ensure the operation is performed successfully.
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3 min readIn Rust, the value returned from a function is determined by the last expression in the function. The value of this expression will be returned and assigned to the caller of the function. Rust uses a concept called "implicit return" which means that you do not need to explicitly use the return keyword to return a value from a function. Instead, the value of the last expression in the function will automatically be returned. This allows for cleaner and more concise code in Rust.
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4 min readIn Rust, if-let statements can be combined by simply nesting them within each other. This allows for multiple conditions to be checked in a single statement. Each if-let statement can have its own pattern matching and optional code block to execute if the condition is satisfied. By nesting if-let statements, you can create more complex conditional logic that checks for multiple conditions at once.
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4 min readTo implement a dynamic 2D array inside a struct in Rust, you can use a Vec of Vecs. You can define a struct with a field of type Vec<Vec> where T is the type of elements in your 2D array. This allows you to create and manipulate a dynamic 2D array within your struct. You can then initialize and access elements in the 2D array using indexing syntax like struct_name.2d_array[row_index][col_index].
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6 min readTo wait for a list of async function calls in Rust, you can use the futures::future::join_all function, which takes a list of futures and returns a future that resolves once all the input futures have completed. You can create a vector of async function calls, pass it to join_all, and then use the await keyword to wait for all the async calls to complete before proceeding with the rest of your code.
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4 min readIn Rust, returning a struct by value is done by simply returning the struct from a function. Rust uses move semantics, so when a struct is returned from a function, its ownership is moved to the calling code. This means that the struct is copied or moved as necessary, without any additional overhead.To return a struct by value in Rust, simply define a function that creates and returns the struct, and then call that function from your code.
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7 min readIn Rust, the strategy pattern can be modeled using traits and structs.First, define a trait that represents the behavior of the strategy. This trait will contain a method that performs the desired action.Next, create multiple structs that implement the trait. Each struct will define its own implementation of the method specified in the trait.
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6 min readTo declare a generic hashmap in a Rust struct, you can use the following syntax: use std::collections::HashMap; struct MyStruct<K, V> { my_map: HashMap<K, V>, } In this example, MyStruct is a generic struct that contains a generic hashmap my_map. The hashmap can store keys of type K and values of type V. You can then use this struct to create instances with specific types for the key and value in the hashmap.
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5 min readWeighted vests can potentially help with bone density by increasing the load on the bones during weight-bearing activities. This increased load can stimulate bone growth and remodeling, which can ultimately lead to improved bone density. However, it is important to use weighted vests under the guidance of a healthcare professional or fitness expert to ensure that they are used safely and effectively.
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5 min readWhen using a weighted vest, there are certain exercises that you may want to avoid to prevent potential injury or strain. Exercises that involve twisting or jerking motions, such as kettlebell swings or burpees, may put added stress on your joints and back when combined with the extra weight of a vest. Similarly, high-impact activities like running or jumping may also be too intense with a weighted vest, especially if you're not used to the added resistance.