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Questions tagged [match]

A programming concept about finding results based on some kind of search. Typically used when talking about regular expressions.

A programming concept about finding results based on some kind of search. Typically used when talking about regular expressions.

See also , ,

8645 questions
1138
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15 answers

Check whether a string matches a regex in JS

I want to use JavaScript (I can also use jQuery) to do check whether a string matches the regex ^([a-z0-9]{5,})$, and get a true or false result. match() seems to check whether part of a string matches a regex, not the whole thing. Does it solve the…
Richard
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How to test multiple variables for equality against a single value?

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 == 0: …
user1877442
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What is the Python equivalent for a case/switch statement?

Is there a Python equivalent for the switch statement?
John Alley
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675
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10 answers

What is the difference between re.search and re.match?

What is the difference between the search() and match() functions in the Python re module? I've read the Python 2 documentation (Python 3 documentation), but I never seem to remember it.
Daryl Spitzer
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4 answers

Is there an R function for finding the index of an element in a vector?

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…
Ryan C. Thompson
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8 answers

How to match a String against string literals?

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…
Jeroen
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10 answers

How can I add a string to the end of each line in Vim?

I want to add * to the end of each line in Vim. I tried the code unsuccessfully :%s/\n/*\n/g
Léo Léopold Hertz 준영
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291
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6 answers

Check if string begins with something?

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 want to set a class for an element for path names that start in a certain…
n00b0101
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How to test if a string contains one of the substrings in a list, in pandas?

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…
ari
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12 answers

Return positions of a regex match() in Javascript?

Is there a way to retrieve the (starting) character positions inside a string of the results of a regex match() in Javascript?
stagas
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4 answers

Selecting data frame rows based on partial string match in a column

I want to select rows from a data frame based on partial match of a string in a column, e.g. column 'x' contains the string "hsa". Using sqldf - if it had a like syntax - I would do something like: select * from <> where x like 'hsa'. Unfortunately,…
Asda
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Java: method to get position of a match in a String?

String match = "hello"; String text = "0123456789hello0123456789"; int position = getPosition(match, text); // should be 10, is there such a method?
hhh
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Why does pattern matching in Scala not work with variables?

Take the following function: def fMatch(s: String) = { s match { case "a" => println("It was a") case _ => println("It was something else") } } This pattern matches nicely: scala> fMatch("a") It was a scala> fMatch("b") It…
Henry Henrinson
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JavaScript - Use variable in string match

I found several similar questions, but it did not help me. So I have this problem: var xxx = "victoria"; var yyy = "i"; alert(xxx.match(yyy/g).length); I don't know how to pass variable in match command. Please help. Thank you.
mesnicka
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7 answers

What does the "Nothing to repeat" error mean when using a regex in javascript?

I'm new to Regex and I'm trying to work it into one of my new projects to see if I can learn it and add it to my repitoire of skills. However, I'm hitting a roadblock here. I'm trying to see if the user's input has illegal characters in it by using…
esqew
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