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4 min readTo find filenames with a specific extension using regex, you can use the following regular expression pattern: .*\.(extension)$.In this pattern, replace "extension" with the specific extension you are looking for. The dot . means any character, the asterisk * means zero or more occurrences of the preceding character, the backslash \ is used to escape the dot and parentheses, and the dollar sign $ means the end of the string.For example, if you are looking for files with a .
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4 min readTo match complete words for acronyms using regex, you can use word boundaries (\b) to ensure that the acronym is a standalone word within the text. This will prevent partial matches of the acronym within other words. Here is an example of how you can use regex to match complete words for an acronym:For example, if you have an acronym like "USA" that you want to match in a text, you can use the regex pattern "\bUSA\b".
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6 min readIn Python, you can store the matched part of a regular expression using capturing groups. Capturing groups are defined by enclosing the part of the regex that you want to capture in parentheses.For example, if you have the regex pattern (\d{3}), this will capture any three-digit number in the string that you are applying the regex to. To access the matched part of the regex, you can use the group() method on the match object.
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7 min readTo parse a single line using regular expressions (regex), you can use the re module in Python. You can define a regex pattern that matches the specific format or content you are looking for in the line. Then, use functions like re.match() or re.search() to find and extract the desired information from the line based on your regex pattern. Additionally, you can use groups in the regex pattern to capture specific parts of the line for further processing.
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5 min readTo replace URL parts with regex in Python, you can use the re module to search for a specific pattern in the URL and replace it with the desired value. You can define a regular expression that matches the specific parts of the URL you want to replace, and then use the re.sub() function to replace those parts with the desired value.
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8 min readTo find the same variable with different values using regex, you can use capturing groups in your regular expression pattern. By using capturing groups, you can match the variable name and then search for instances where the same variable name is followed by a different value. For example, if you want to find instances where a variable "foo" is assigned two different values in a text, you can use a regex pattern like: /foo\s*=\s*(\w+)\s*;\sfoo\s=\s*(\w+)/.
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4 min readTo prefix certain characters in a string using regular expressions, you can use the replace() method in JavaScript. You can specify the characters you want to prefix in the regular expression pattern and then use a callback function to add the desired prefix to those characters. For example, if you want to prefix all numbers with the character $ in a string, you can use the following code: let str = "12345"; let result = str.replace(/\d/g, (match) => `$${match}`); console.
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6 min readTo get comments and strings in a regular expression (regex), you can use capturing groups. Capturing groups allow you to extract specific parts of a matched string.To capture comments, you can use a regular expression pattern that matches comments in the input string. For example, you can use the pattern "//.*" to match comments starting with "//" in a programming language.To capture strings, you can use a pattern that matches quoted strings in the input string.
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4 min readTo change the legend name in Grafana using regex, you can use the "legend format" option in the visualization settings. By applying a regular expression pattern to the legend format field, you can extract specific parts of the metric name or tag values and display them in the legend. This allows you to customize the legend name based on the data being visualized, making it more informative and easier to understand for users.
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4 min readTo ignore white space in a string using regex, you can use the regex pattern \s+ to match one or more whitespace characters and then replace them with an empty string. This can be done in various programming languages like Python, Java, JavaScript, etc. By using this method, you can effectively remove all white space from the string and obtain the desired output without any extra spaces.[rating:f57ed76a-ab98-4054-8d2c-1baca0521009]What is regex.
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3 min readTo match '&' symbols which are inside brackets using regex, you can use the following pattern:/\((.*?)&+(.*?)\)/This pattern will match any '&' symbols that are enclosed within brackets. The '(' and ')' matches the opening and closing brackets, '(.?)' matches any characters inside the brackets (non-greedy), '&' matches the ampersand symbol, and '(.?)' matches any characters after the ampersand symbol.