I recently developed a practice of using single-letter identifier names in code I write. This practice is quite contrary to my principle for writing clean code. I aim to make readers understand the code I write without thinking too hard. However, I have two points of view to support this practice.
identifier is the generic term for variable names and names of constants. I use the term identifier and not variable name because identifier encompasses variable names and constant names.
Loops already have a collection name
Take for example the code snippet below
const prices = products.map((p) => p.price)
Although the identifier in the loop is a letter p, I doubt that readers will falter in knowing that p signifies product because .map loops over products, therefore, every item in the loop is a product.
This is fine for typed programming languages
If the code is written in a typed programming language such as Golang or TypeScript, this practice should not be an issue. p will be typed as an item in the products collection, making it easy to figure out.