Posts (page 34)
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5 min readTo open multiple windows in tkinter, you can create a new instance of the Tk() class for each window you want to open. Each instance will represent a separate window with its own set of widgets and functionality. You can customize each window by adding different widgets, setting unique properties, and defining distinct functions. By creating multiple instances of the Tk() class, you can effectively open and manage multiple windows within a tkinter application.
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6 min readTo optimize number regex in JavaScript, you should consider using specific quantifiers to match the exact number of digits you are looking for. You can also use character classes like \d to match any digit and limit the possible variations in the regex pattern. Additionally, you can use anchors like ^ and $ to ensure the regex matches the entire string rather than just a part of it.
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4 min readTo capture values with a space after a hyphen using regex, you can use the following pattern: -\s(\w+) In this pattern, the hyphen "-" is followed by a space "\s" and then a capturing group "(\w+)" for one or more word characters. This will match any value that follows a hyphen and a space.You can use this regex pattern in your code to find and capture such values in a text string.
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4 min readTo match a regex in a repetitive pattern, you can use quantifiers in your regex pattern. Quantifiers allow you to specify the number of times a character or group of characters can repeat in the string.For example, the quantifier { and } can be used to specify a specific number of repetitions. The {3} quantifier will match exactly 3 repetitions of the preceding character or group of characters. You can also use range quantifiers like {3,5} to match between 3 and 5 repetitions.
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6 min readTo remove only words that end with a period using regex, you can use the following pattern: \b\w+\.?\b.Here's a breakdown of the pattern:\b: This matches a word boundary, ensuring that we are matching whole words.\w+: This matches one or more word characters (letters, numbers, or underscores).\.?: This matches zero or one period at the end of the word.\b: This matches another word boundary at the end of the word.
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3 min readTo use multiple regex expressions for one string, you can create a single regex pattern that combines all desired expressions using the "OR" operator "|". This allows the pattern to match any of the individual expressions within the string. Additionally, you can use capturing groups to isolate specific parts of the matched text for further processing or analysis.
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5 min readTo use regex to find a specific pattern, you first need to define the pattern you are looking for using regular expressions. Regular expressions are a sequence of characters that define a search pattern. Once you have defined your pattern, you can use it with a regex function in programming languages such as Python, JavaScript, or PHP.For example, if you want to find all email addresses in a text, you can define a regex pattern that matches the typical format of an email address (e.g.
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3 min readWhen using regex to dynamically extract numbers before text, you can use the following regular expression pattern: ([0-9]+)\D+. This pattern will match one or more digits followed by one or more non-digit characters (such as whitespace, punctuation, or letters).To use this pattern in code, you can use a regex function or method in your programming language of choice, such as re.findall() in Python, Regex.Match() in C#, or String.prototype.match() in JavaScript.
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7 min readTo find the second number in a string using a regular expression (regex), you can create a pattern that matches the first number and then use a capturing group to extract the second number. For example, if you have a string "abc 123 xyz 456 pqr", you can use the regex pattern "\d+" to match any number in the string and then use a capturing group "(.*?)(\d+)" to extract the second number. You can then access this second number by referencing the capturing group.
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5 min readIn PHP, you can exclude part of text using regular expressions by using the preg_replace() function. You can use regular expressions to match the text you want to exclude and replace it with an empty string.
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4 min readTo find a regex pattern after a specific number of characters in a string, you can use the positive lookahead assertion in regex. This allows you to specify a certain number of characters before the desired pattern that you want to match.For example, if you want to find the word "pattern" after 5 characters in a string, you can use the regex pattern: .{5}(pattern) . In this pattern, .
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4 min readTo find a string at a specific location with regex in Java, you can use the Matcher class along with the Pattern class. First, you need to create a Pattern object with the regex pattern you want to match. Then, use the matcher() method on the Pattern object to create a Matcher object. Next, use the find() method on the Matcher object to locate the string at the specified location in the input string.