Is there any function that would be the equivalent of a combination of df.isin() and df[col].str.contains()? For example, say I have the series s = pd.Series([‘cat’,’hat’,’dog’,’fog’,’pet’]), and I want to find all places where s contains any of [‘og’, ‘at’], I would want to get everything but ‘pet’. I have a solution, but it’s rather … Read more
Is there a way to retrieve the (starting) character positions inside a string of the results of a regex match() in Javascript? 11 Answers 11
This question already has answers here: How to check if a string “StartsWith” another string? (18 answers) Closed 2 years ago. I know that I can do like ^= to see if an id starts with something, and I tried using that for this, but it didn’t work. Basically, I’m retrieving a URL and I … Read more
I want to add * to the end of each line in Vim. I tried the code unsuccessfully :%s/\n/*\n/g 10 Answers 10
I’m trying to figure out how to match a String in Rust. I initially tried matching like this, but I figured out Rust cannot implicitly cast from std::string::String to &str. fn main() { let stringthing = String::from(“c”); match stringthing { “a” => println!(“0”), “b” => println!(“1”), “c” => println!(“2”), } } This has the error: … Read more
In R, I have an element x and a vector v. I want to find the first index of an element in v that is equal to x. I know that one way to do this is: which(x == v)[[1]], but that seems excessively inefficient. Is there a more direct way to do it? For … Read more
What is the difference between the search() and match() functions in the Python re module? I’ve read the documentation (current documentation), but I never seem to remember it. I keep having to look it up and re-learn it. I’m hoping that someone will answer it clearly with examples so that (perhaps) it will stick in … Read more
I’m trying to make a function that will compare multiple variables to an integer and output a string of three letters. I was wondering if there was a way to translate this into Python. So say: x = 0 y = 1 z = 3 mylist = [] if x or y or z == … Read more
I want to use JavaScript (can be with jQuery) to do some client-side validation to check whether a string matches the regex: ^([a-z0-9]{5,})$ Ideally it would be an expression that returned true or false. I’m a JavaScript newbie, does match() do what I need? It seems to check whether part of a string matches a … Read more
