Rubular is a Ruby-based regular expression editor. It's a handy way to test regular expressions as you write them. To start, enter a regular expression and a test string. Or you can try an example.
![Rubular: a Ruby regular expression editor and tester](https://cdn-ak-scissors.b.st-hatena.com/image/square/62d2bbbca8f240ebc21d445fd9ee73fd2625fb4d/height=288;version=1;width=512/https%3A%2F%2Frubular.com%2Fassets%2Frubular_og-4948f7355b502d134c18e9fade5bc2e39c3a343ae818f2f5bdf922d8dc9bd919.png)
Unicode is a character set that aims to define all characters and glyphs from all human languages, living and dead. With more and more software being required to support multiple languages, or even just any language, Unicode has been strongly gaining popularity in recent years. Using different character sets for different languages is simply too cumbersome for programmers and users. Unfortunately,
2007年04月24日18:00 カテゴリLightweight Languages perl - parser書くならgoto しかし、本当の本当の本番はこちらだったりする。 404 Blog Not Found:perl - POO と goto Perl 5のgotoは、仕組みを理解した上で使いどころを誤らなければかのごとく強力なのである。 前回の例では、それでも"One of many ways to do it"で、「知らなくても困らない」レベルのものであった。しかし、今回の例は、gotoがなければ本当にきつい。 以下の例を考えてみよう。 入力: (define (fact n) (if (= n 1) 1 (* n (fact (- n 1))))) 出力: [['define',['fact','n'],['if',['=','n','1'],'1',['*','n',['f
Regular Expression Matching Can Be Simple And Fast (but is slow in Java, Perl, PHP, Python, Ruby, ...) Russ Cox rsc@swtch.com January 2007 Introduction This is a tale of two approaches to regular expression matching. One of them is in widespread use in the standard interpreters for many languages, including Perl. The other is used only in a few places, notably most implementations of awk and grep.
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