I want a regular expression, which returns only digits, which are within a word, but I can only find expressions, which returns all digits in a string. I’ve used this example: text = ‘I need this number inside my wor5d, but also this word3 and this 4word, but not this 1 and not this 555.’… Read More Extract digits from a string within a word

My string looks like this: (left.e0_coefficient*right.Scalar) e₀ + (left.e1_coefficient*right.Scalar) e₁ + (left.e2_coefficient*right.Scalar) e₂ + (left.e3_coefficient*right.Scalar) e₃ I want to get the expression thats contained in the parentheses preceeding e₂ => left.e2_coefficient*right.Scalar I tried using \((.+?)\) e₂ however despite it being lazy (non-greedy) the capturing group still contains everything from the first parenthesis in the string… Read More How do I get the characters inside a pair of parentheses which are immediately followed by a specific string?

I have a regex to validate a decimal value before inserting into MySql database, but there is an issue with it. It is allowing a just the negative symbol with no digits after it. So for example, I’m validating against a decimal(7,2). Here is my regex: ^[+-]?\d{0,5}(?:\.\d{0,2})?$ And here are the valid/invalid values Valid -1… Read More Javascript regex to validate a decimal before inserting into MySQL

I have array of vars array(2) { ["M"]=> string(3) "500" ["MA"]=> string(3) "200" } AND strings "1000-M", "1000-MA", "1000+MA-M", "MA/2", "M*MA+100" And I need to replace M with value 500, and MA with value 200. When I use str_replace it works but only for M, because it still match with first var M Thanks for… Read More replace exact string in another string

I’m trying to capture strings that do not have a standard form. Some come with two words, others three, and some even have a phrase. What I’ve been able to muster at this point is to capture up to two words only. Any help is appreciated. str1 = ‘File quarantined’ str2 = ‘Unable to quarantine… Read More Python RegEx – Capture Varying Length of Characters

Using this text as an example: foo 34abcd bar 7890xyz 123. Please help me find a regex to find all "orphan" numbers, that would be 123; and regex to find all "orphan" texts, that would be foo and bar. To find all number followed immediately by a text is simple, I use a simple regex… Read More Regext to find text segments where text in not preceded by a number

Given example-123, I need to extract just example. Also example could be: example-example-345, in which case I need example-example. This is the pattern I’m looking for: > str.match(‘-[0-9]{1,}$’)[0] ‘-123’ I tried: str.match(/(.*)-[0-9]{1,}$/) ‘example-123’ and str.match(/(?s).*)-[0-9]{1,}$/)[0] Uncaught SyntaxError: Invalid regular expression: /(?s).*)-[0-9]{1,}$/: Invalid group and str.match(‘[^-[0-9]{1,}$]’) null and str.match(‘(.*)[^-[0-9]{1,}$]’) null and str.match(‘/.*/[^-[0-9]{1,}$]’) null and str.match(‘.*^(-[0-9]{1,}$)’) null… Read More Javascript match anything until pattern

I have used this regex to match a valid sentence: It serves the purpose to validate a sentence – (by definition) starts with Capital letter(s) no punctuations in the middle of sentence, and it ends with one or more of the punctuations. (eg. ?!) (because the 2nd part is very similar with 3rd part, except… Read More Use regex to match a valid sentence

Suppose I have a search pattern like ^FOO.B.A.R, and I want to check whether a string matches the full search pattern, but, if the string is shorter than the search pattern, it’s allowed to match only part of it. That is: If the string is 1 character long, it must match ^F If the string… Read More Regex search string with partial matches allowed

Just wondering what could be wrong with my regEx function, is returning false, is there a better or cleaner approach to mimic startsWith as my application has an embedded JS engine that is ecma 1.8.5 spidermonkey function startsWith(i,s) { var regEx = new RegExp(“/^”+i+”/”); console.log(regEx) return regEx.test(s); } const myString = “hello world”; console.log(startsWith(“hello”,myString)); update… Read More regEx function not does not pass test