Posts (page 143)
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6 min readTo iterate over all unique permutations of a sequence in Rust, you can use the permutations function from the itertools crate. First, add itertools as a dependency in your Cargo.toml file. Then, import the Itertools trait from the itertools crate in your code. Use the permutations function on the sequence you want to generate permutations for, and then iterate over the permutations using a loop or any other desired method.
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4 min readVolume analysis is a statistical technique used to analyze the trading volume of a stock or financial instrument. In Julia, you can compute volume analysis by first importing the necessary packages such as DataFrames and StatsBase.Next, you can calculate metrics such as the average trading volume, volume moving averages, and volume indicators like the on-balance volume (OBV).
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5 min readTo execute a command in a subshell in Rust, you can use the std::process::Command module. This allows you to run a command in a separate shell process. You can use the spawn() method to create a new child process that will run the command. Here is an example code snippet: use std::process::Command; fn main() { let output = Command::new("ls") .arg("-l") .output() .expect("failed to execute process"); let result = String::from_utf8(output.
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6 min readTo create a Commodity Channel Index (CCI) in VB.NET, you will first need to calculate the typical price, the simple moving average of the typical price, and the mean deviation. Once you have these values, you can then calculate the CCI using the formula: CCI = (Typical Price - SMA of Typical Price) / (0.015 * Mean Deviation).You can implement this calculation in VB.NET by writing a function or subroutine that takes in the necessary input values and returns the CCI value.
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6 min readTo safely wrap C pointers in Rust structs, you should utilize Rust's std::ptr module to manage and manipulate the raw pointers. This ensures that the memory safety guarantees provided by Rust are maintained.When creating a struct that wraps a C pointer, use std::ffi::c_void as the type for the pointer field in the struct definition. This clearly indicates to other developers that the field is a raw C pointer.
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4 min readChaikin Money Flow (CMF) is a popular technical analysis indicator used to measure the buying and selling pressure of a security. It is calculated by summing the Money Flow Volume over a specific period and then dividing it by the sum of volume over the same period.To calculate the Chaikin Money Flow using SQL, you will need to first calculate the Money Flow Volume for each period.
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6 min readIn Rust, we can implement the Copy trait for enums by ensuring that all variants of the enum are copyable. To do this, we need to implement the Copy trait for the enum itself. This means that all variants of the enum must also implement the Copy trait.If we want to implement the Copy trait for an enum, we need to make sure that all the variants of the enum are also Copy. If any variant contains non-Copy types, then the enum cannot be Copy.
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7 min readIn order to calculate the Parabolic SAR (Stop and Reverse) indicator in Dart, you will need to follow a specific formula. The Parabolic SAR is used to determine potential reversals in price movement.To calculate the Parabolic SAR, you will need the following inputs: the current period's high, the current period's low, the previous period's SAR value, and the acceleration factor.The first step is to calculate the SAR for the current period.
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8 min readIn Rust, you can return a value from inside a for loop by using the return keyword followed by the value that you want to return. However, in Rust, the return type of a for loop is (), meaning that it doesn't return anything by default. To work around this, you can use the Iterator::find() method to find the value you are looking for and return it, or you can declare a variable outside of the for loop and assign the value to it, then return that variable at the end of the loop.
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4 min readTo test for type equality in Rust, you can use the is operator or the std::any::TypeId feature. The is operator allows you to compare types directly, while the std::any::TypeId feature allows you to retrieve a unique identifier for each type and compare those identifiers. By using these tools, you can accurately test for type equality in Rust.[rating:e980a4de-c59d-4b7e-aec7-f056836a2af2]How to handle dynamic type checking in Rust when testing for type equality.
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5 min readTo calculate Chaikin Money Flow (CMF) in PHP, you can follow these steps:First, you need to gather the necessary data such as the high, low, close, and volume of a security for a specific period. Next, calculate the Money Flow Multiplier (MFM) by using the formula: MFM = ((close - low) - (high - close)) / (high - low). This formula gives a value between -1 and 1, indicating buying and selling pressure.
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7 min readTo update a YAML file with dynamic properties in Rust, you can use the serde_yaml crate to serialize and deserialize YAML data.First, you need to read the existing YAML file and deserialize it into a Rust struct using the serde_yaml::from_str function. Then, you can modify the properties of the struct as needed.After making the changes, you can serialize the modified struct back into a YAML string using the serde_yaml::to_string function.