| --- Log opened Mon Nov 29 00:00:31 2010 |
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| 23:41 | < gnolam> | http://spectrum.ieee.org/computing/software/ray-kurzweils-slippery-futurism/0 |
| 23:41 | < gnolam> | Hah! More people who share my views on Kurzweil. |
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| 23:49 | < AnnoDomini> | So, are there any libraries/somethings for C++ that make using Strings less of a total pain in the ass? I'm talking about a level of ease of use like, say, Java or Perl. I've heard that bstring is good, but how good is it? |
| 23:50 | <@McMartin> | ... std::string is much easier to use than Java strings. What are you trying to do? |
| 23:50 | < celticminstrel> | What's wrong with std::string? |
| 23:51 | < AnnoDomini> | Comparing strings stands out. Also the interplay between character arrays and strings. |
| 23:51 | < celticminstrel> | Comparing strings is even easier than Java: s1 < s2 |
| 23:52 | <@McMartin> | boost::algorithm provides a variety of additional string operations that make life easier for things like systematic recasing. |
| 23:52 | <@McMartin> | Formatting means you need to use std::stringstream and the << notation, mostly. |
| 23:53 | < AnnoDomini> | Huh? When I wanted to check if two strings are the same, I had to do something like: "!one.cmp(two)", compared to Java's "one.equals(two)". |
| 23:53 | <@McMartin> | Interplay between character arrays and strings is no easier or harder in C++ than Java - there's a method that gives you an equivalent array. |
| 23:53 | <@McMartin> | AnnoDomini: ... You Are Doing It Wrong. |
| 23:53 | < celticminstrel> | AnnoDomini: You can use regular comparison operators on strings. |
| 23:53 | <@McMartin> | The way to check equality on strings is "a == b" |
| 23:53 | < celticminstrel> | Just write "one == two" |
| 23:53 | < AnnoDomini> | I never knew that. |
| 23:54 | <@McMartin> | std::stringstream is also the equivalent of Java's StringWriter and is syntactically identical to using std::cout |
| 23:54 | < AnnoDomini> | Does it work with a string and some characters in quotes? |
| 23:55 | <@McMartin> | char * will autocast to string as part of comparators if the compiler can conclusively prove that's the only possible interpretation. |
| 23:55 | <@McMartin> | If it can't, you can do it with a manual constructor: a += string("YARRRR") |
| 23:55 | < celticminstrel> | The comparison operators only work on string literals if the other operand is a string variable, basically. Or something like that. |
| 23:55 | <@McMartin> | Right |
| 23:55 | <@McMartin> | "foo" + "bar" won't work, string("foo") + "bar" will probably work, string("foo") + string("bar") will always work. |
| 23:55 | <@McMartin> | And it's a value class, not an immutable reference a la Java. |
| 23:56 | <@McMartin> | Which lets you have loops that append to strings be linear instead of quadratic. |
| 23:56 | < celticminstrel> | Of course, yes, the string literals thing is more noticeable with the concatenation operator. |
| 23:56 | < celticminstrel> | (Since there's no reason anyone would want to compare two string literals!) |
| 23:56 | <@McMartin> | (string literals have to work like C's horribly broken non-strings.) |
| 23:57 | <@McMartin> | (design restriction; life sucks; wear a helmet) |
| 23:57 | <@McMartin> | (At least it makes the foreign function interfaces a lot easier) |
| 23:57 | < Namegduf> | I wouldn't call them "broken", but "non-strings" is right. |
| 23:57 | < celticminstrel> | (How so?) |
| 23:57 | < Namegduf> | They're just byte arrays |
| 23:57 | <@McMartin> | (Most system libraries are written in C; C++ string literals can be used against them with zero overhead) |
| 23:58 | <@McMartin> | (std::strings can be used against them with the overhead of a usually inlined function call to c_str() |
| 23:58 | < AnnoDomini> | Returning to an early question - what I wanted to do was try my hand at a console-based game. I'd do this is Java, but I can't make heads or tails of how Java is supposed to work with console for this specific application. |
| 23:58 | <@McMartin> | Aha, yeah |
| 23:59 | <@McMartin> | So you're linking curses. |
| 23:59 | <@McMartin> | std::string is your best bet for to-from byte arrays. |
| 23:59 | < AnnoDomini> | Yeah, curses seems to be the way to go for everything console in C++. |
| 23:59 | <@McMartin> | curses is a C library, though, so char * everywhere |
| --- Log closed Tue Nov 30 00:00:09 2010 |