How to find and remove different classes with a regex

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I want to remove all data-reactid properties from a document. However, all the IDs inside are different. How can I find them all at once, and replace them with empty string? (to remove them).






You could match data-reactid=" and then match not a double quote using a negated character class [^"]+ followed by a "


Replace with an empty string.

jQuery: How to remove classes from elements using a regular , jQuery: How to remove classes from elements using a regular expression If you want to remove multiple/unknown classes matching a given pattern, you can do that. We use ^ and \s to split the class attribute string and find all class names. Just open the search bar (CTRL+F), make sure to select the icon with a dot and asterisk (.*) which means "Enable Regular Expressions", then you can find and replace regex html tag or attribute. In the picture below we have a useless attribute onclick which we want it removed in all <a> anchor tags, or you can remove them globally. The same you can do with classes or ids, if your html tag have it.`

Use this: cat your_file | sed 's/^data-reactid=.*//'

Character Classes or Character Sets, RegexBuddy—Better than a regular expression tutorial! A character class matches only a single character. gr[ae]y does not match graay, graey or any Hyphens at other positions in character classes where they can't form a range may be  //Replace/Remove characters that do not match the Regular Expression static public string ReplaceNotExpectedCharacters( this string text, string allowedPattern,string replacement ) { allowedPattern = allowedPattern.StripBrackets( "[", "]" ); //[^ ] at the start of a character class negates it - it matches characters not in the class.

Well I am not entirely sure which language you are opting to use to parse the document data to remove the values as you are suggesting, but if you are good using Java, this should accomplish what you want.

public static void main( String args[] ) {
    String lineOfDocument = "data-reactid=\".25lvfez8hmo.\"";

    //pattern to find in document line, will find everything in data-reactid=" "
    String pattern = "data-reactid=\".*\"";

    //now fix the line
    String fixedLineOfText= lineOfDocument.replaceAll(pattern, "data-reactid=\" \"");

    //you can now write it back to the document, but for simplicity, I
    //will just print it out
    System.out.println(fixedLineOfText);    //will output data-reactid=" "


If you want to actually remove the entire line from the document change the replaceAll line with this:

String fixedLineOfText= lineOfDocument.replaceAll(pattern, "");

.class specific search and replace, Use notepad++ with regular expressions. Open Notepadd++; Press CTRL + H; Select Regular expression as search mode; Enter ^.*myClass.*$ under Find what​  The -regex find expression matches the whole name, including the relative path from the current directory. For find . this always starts with ./, then any directories. Also, these are emacs regular expressions, which have other escaping rules than the usual egrep regular expressions. If these are all directly in the current directory, then

Find and replace text using regular expressions, Once you learn the regex syntax, you can use it for almost any language. Press Ctrl+R to open the search and replace pane. The tables are meant to serve as an accelerated regex course, and they are meant to be read slowly, one line at a time. On each line, in the leftmost column, you will find a new element of regex syntax. The next column, "Legend", explains what the element means (or encodes) in the regex syntax.

Character classes, To do so, we can find and remove anything that's not a number. Character classes There are other character classes as well. Most used are:. It is intended to find the following regex patterns in the given string: A period at the end of a word; Commas; Semi-colons; Single apostrophes; The combination of the brackets and pipe characters is what makes this work. It’s often hard to read regex patterns, so it may help to look at that multiple search pattern regex more generally, like this:

Using Regex for Text Manipulation in Python, For instance, you may want to remove all punctuation marks from text A Regular Expression is a text string that describes a search pattern which can be used to classes that can be used to perform a variety of different string manipulation  Character classes in regular expressions. 03/30/2017; 33 minutes to read +12; In this article. A character class defines a set of characters, any one of which can occur in an input string for a match to succeed. The regular expression language in .NET supports the following character classes: Positive character groups.