I just want to create a regular expression out of any possible string. var usersString = "Hello?!*`~World()[]"; var expression = new RegExp(RegExp.escape(usersString)) var matches = "Hello".match(expression); Is there a built in...
What is the problem with this regular expression when I use the global flag and the case insensitive flag? Query is a user generated input. The result should be [true, true]. var query = 'Foo B'; var re = new RegExp(query, 'gi'); v...
I would like to create a String.replaceAll() method in JavaScript and I'm thinking that using a regex would be most terse way to do it. However, I can't figure out how to pass a variable in to a regex. I can do this already which will rep...
I want to match a portion of a string using a regular expression and then access that parenthesized substring: var myString = "something format_abc"; // I want "abc" var arr = /(?:^|\s)format_(.*?)(?:\s|$)/.exec(myString); co...
In the regex below, \s denotes a space character. I imagine the regex parser, is going through the string and sees \ and knows that the next character is special. But this is not the case as double escapes are required. Why is this? var res = n...
How can I use Unicode-aware regular expressions in JavaScript? For example, there should be something akin to \w that can match any code-point in Letters or Marks category (not just the ASCII ones), and hopefully have filters like [[P*]] for punctu...
Is there a way to achieve the equivalent of a negative lookbehind in javascript regular expressions? I need to match a string that does not start with a specific set of characters. It seems I am unable to find a regex that does this without faili...
I want a regular expression to check that: A password contains at least eight characters, including at least one number and includes both lower and uppercase letters and special characters, for example #, ?, !. It cannot be your old password or...
I am after documentation on using wildcard or regular expressions (not sure on the exact terminology) with a jQuery selector. I have looked for this myself but have been unable to find information on the syntax and how to use it. Does anyone know...
How do I split a string with multiple separators in JavaScript? I'm trying to split on both commas and spaces but, AFAIK, JS's split function only supports one separator....
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