Programming Forums > Application Development > Other Programming Languages

Game_Ender · Jul 22nd, 2006, 4:09 PM

Here is what I mean about the templates and regular expressions. Take a look at the code below:

 c Syntax (Toggle Plain Text) 
// Our regex "[a-z]*\s*\w*"
// In D
auto exp = &regexMatch!(r"[a-z]*\s*\w*");
writefln("matches: %s", exp("hello    world"));
// In C++ with Boost and Xpressive
sregex = *range('a','z') >> *_s >> *_w
// Our regex "[a-z]*\s*\w*"
// In D
auto exp = &regexMatch!(r"[a-z]*\s*\w*");
writefln("matches: %s", exp("hello    world"));
// In C++ with Boost and Xpressive
sregex = *range('a','z') >> *_s >> *_w

This shows another cool but simple feature of D, raw strings. Just like python. It is important to note that both are based on templates and the regular expression is compiled at compile time. D's templates just seem better the C++, I am still geting used to the !() rather the <> in C++.

Baphomet · Jul 22nd, 2006, 5:41 PM

Quote:

There is a language exactly like C++. It's called "C++".

What's the use in saying "I want to use a language like some other language X"? Just use X.

I learn a few more languages(I only know about 4 or 5)... But most of them don't offer what I need. C++ is the most useful. I just don't want only be experienced in only two or three langauges (I know GoldBasic, Assembler, C/C++,Qbasic, and JavaScript; I'm only know the first three really well)

Silvanus · Jul 22nd, 2006, 6:52 PM

Baphomet- If you want to learn another language, learning one that's radically different from the ones you know would be more educational/useful than learning one as similar as D is to C++. Try a language like Python or Ruby- they are both very different from languages you know.

mikaoj · Jul 22nd, 2006, 7:24 PM

Crap, I need to install GCC at new to get GDC working, so I may get an older GCC

Baphomet · Jul 22nd, 2006, 8:13 PM

Quote:

Baphomet- If you want to learn another language, learning one that's radically different from the ones you know would be more educational/useful than learning one as similar as D is to C++. Try a language like Python or Ruby- they are both very different from languages you know.

Quite honestly, I thought about learning those two. Are they compiled languages? I never got a straight answer when I did research.

Arevos · Jul 22nd, 2006, 8:21 PM

Quote:

Originally Posted by Baphomet

Quite honestly, I thought about learning those two. Are they compiled languages? I never got a straight answer when I did research.

Ruby is interpreted. It's parsed, converted into an abstract syntax tree (AST) and then executed. This makes it rather slow.

Python is compiled at runtime into platform independant bytecode. The bytecode for external modules is cached to allow for faster startup times. Python is typically several times faster than Ruby, but still quite a bit slower than Java and C++.

That said, modern processors have so much power these days that one usually doesn't need the efficiency of C or C++. And when one does, both Python and Ruby make it easy to integrate C/C++ routines in when you need that sort of power.

Both Python and Ruby are rather different from C++. Much more so than D, at least.

Baphomet · Jul 22nd, 2006, 8:25 PM

I don't want to learn an interpreted language for application development. Unless, I;m mking a web program or something.

DaWei · Jul 22nd, 2006, 8:33 PM

Quote:

I don't want to learn an interpreted language for application development

Why not? Is your career in embedded systems always running on the bleeding edge? Are your opinions sustainable by rational research and evaluation, or have you just 'heard stuff'??

Baphomet · Jul 22nd, 2006, 8:47 PM

Quote:

Why not? Is your career in embedded systems always running on the bleeding edge? Are your opinions sustainable by rational research and evaluation, or have you just 'heard stuff'??

It's because of my clients. At this point I need to be as efficient as possible with whatever language I use. My clients all have Windows. My clients also have old PCs without much memory, hd space, or processor speed. If my clients had faster machines I'd switch. Simple as that.

mikaoj · Jul 23rd, 2006, 12:47 AM

I think this regular expression template stuff in D looks really cool.

Jul 22nd, 2006, 4:09 PM	#11
Game_Ender Professional Programmer Join Date: May 2006 Location: Maryland, USA Posts: 306 Rep Power: 3	Here is what I mean about the templates and regular expressions. Take a look at the code below: c Syntax (Toggle Plain Text) // Our regex "[a-z]\s\w" // In D auto exp = &regexMatch!(r"[a-z]\s\w"); writefln("matches: %s", exp("hello world")); // In C++ with Boost and Xpressive sregex = range('a','z') >> _s >> _w // Our regex "[a-z]\s\w" // In D auto exp = &regexMatch!(r"[a-z]\s\w"); writefln("matches: %s", exp("hello world")); // In C++ with Boost and Xpressive sregex = range('a','z') >> _s >> _w This shows another cool but simple feature of D, raw strings. Just like python. It is important to note that both are based on templates and the regular expression is compiled at compile time. D's templates just seem better the C++, I am still geting used to the !() rather the <> in C++.

Jul 22nd, 2006, 6:52 PM	#13
Silvanus Hobbyist Programmer Join Date: Aug 2005 Location: Hiding from... them... Posts: 110 Rep Power: 4	Baphomet- If you want to learn another language, learning one that's radically different from the ones you know would be more educational/useful than learning one as similar as D is to C++. Try a language like Python or Ruby- they are both very different from languages you know. __________________ :wq

Jul 22nd, 2006, 7:24 PM	#14
mikaoj Programmer Join Date: Aug 2005 Location: Norway Posts: 56 Rep Power: 0	Crap, I need to install GCC at new to get GDC working, so I may get an older GCC __________________ Heh.

Jul 23rd, 2006, 12:47 AM	#20
mikaoj Programmer Join Date: Aug 2005 Location: Norway Posts: 56 Rep Power: 0	I think this regular expression template stuff in D looks really cool. __________________ Heh.

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Jul 22nd, 2006, 8:25 PM	#17
Baphomet Retired Programmer Join Date: Jul 2006 Posts: 45 Rep Power: 0	I don't want to learn an interpreted language for application development. Unless, I;m mking a web program or something.

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Programming Forums > Application Development > Other Programming Languages

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