regexbuddy

What are “steps” in RegexBuddy?

由 与世无争的帅哥 提交于 2020-06-26 04:38:22
问题 RegexBuddy on the tab "Debug" shows how regular expressions are executed step by step. But what exactly that steps mean? What operations are behind every step? 回答1: The steps count is basically how many times the current position in the input was changed, which is a very good indicator of performance. The "current position" may be at any character or between characters (including before and after the entire input). Simplifying it, regex engines process the input by moving the current position

Character class subtraction, converting from Java syntax to RegexBuddy

由 孤街浪徒 提交于 2019-12-17 09:53:39
问题 Which regular expression engine does Java uses? In a tool like RegexBuddy if I use [a-z&&[^bc]] that expression in Java is good but in RegexBuddy it has not been understood. In fact it reports: Match a single character present in the list below [a-z&&[^bc] A character in the range between a and z : a-z One of the characters &[^bc : &&[^bc Match the character ] literally : ] but i want to match a character between a and z intersected with a character that is not b or c 回答1: Like most regex

Regex in Python

由 眉间皱痕 提交于 2019-12-11 05:47:31
问题 Goal: Given a number (it may be very long and it is greater than 0), I'd like to get the five least meaningful digits dropping any 0 at the end of that number. I tried to solve this with regex, Helped by RegexBuddy I came to this one: [\d]+([\d]{0,4}+[1-9])0* But python can't compile that. >>> import re >>> re.compile(r"[\d]+([\d]{0,4}+[1-9])0*") Traceback (most recent call last): File "<stdin>", line 1, in <module> File "/usr/lib/python2.5/re.py", line 188, in compile return _compile(pattern

Unclosed character class near index nnn

由 让人想犯罪 __ 提交于 2019-12-07 04:27:44
问题 I'm borrowing a rather complex regex from some PHP Textile implementations (open source, properly attributed) for a simple, not quite feature complete Java implementation, textile4j, that I'm porting to github and syncing to Maven central (the original code was written to provide a plugin for blojsom, a Java blogging platform; this is part of a larger effort to make blojsom dependencies available in Maven Central). Unfortunately, the textile regex expressions (while they work in context of

Character class subtraction, converting from Java syntax to RegexBuddy

由 拟墨画扇 提交于 2019-11-27 09:15:34
Which regular expression engine does Java uses? In a tool like RegexBuddy if I use [a-z&&[^bc]] that expression in Java is good but in RegexBuddy it has not been understood. In fact it reports: Match a single character present in the list below [a-z&&[^bc] A character in the range between a and z : a-z One of the characters &[^bc : &&[^bc Match the character ] literally : ] but i want to match a character between a and z intersected with a character that is not b or c polygenelubricants Like most regex flavors, java.util.regex.Pattern has its own specific features with syntax that may not be

Regular expression to match URLs in Java

由 隐身守侯 提交于 2019-11-26 10:21:54
I use RegexBuddy while working with regular expressions. From its library I copied the regular expression to match URLs. I tested successfully within RegexBuddy. However, when I copied it as Java String flavor and pasted it into Java code, it does not work. The following class prints false : public class RegexFoo { public static void main(String[] args) { String regex = "\\b(https?|ftp|file)://[-A-Z0-9+&@#/%?=~_|!:,.;]*[-A-Z0-9+&@#/%=~_|]"; String text = "http://google.com"; System.out.println(IsMatch(text,regex)); } private static boolean IsMatch(String s, String pattern) { try { Pattern patt

Regular expression to match URLs in Java

由 谁说我不能喝 提交于 2019-11-26 02:07:58
问题 I use RegexBuddy while working with regular expressions. From its library I copied the regular expression to match URLs. I tested successfully within RegexBuddy. However, when I copied it as Java String flavor and pasted it into Java code, it does not work. The following class prints false : public class RegexFoo { public static void main(String[] args) { String regex = \"\\\\b(https?|ftp|file)://[-A-Z0-9+&@#/%?=~_|!:,.;]*[-A-Z0-9+&@#/%=~_|]\"; String text = \"http://google.com\"; System.out
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