Re: [Dev-C++] vectors

[Daniel G. <sp...@ho...>]

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<P>I thought vecotrs were only used with graphics? Can you use them at other times?<BR><BR></P></DIV>
<DIV></DIV>
<DIV></DIV>&gt;From: "Devin Carless" <DCC...@YA...>
<DIV></DIV>&gt;To: <DEV...@LI...>
<DIV></DIV>&gt;Subject: Re: [Dev-C++] 'New Source File' bug 
<DIV></DIV>&gt;Date: Sun, 17 Feb 2002 11:46:47 -0500 
<DIV></DIV>&gt; 
<DIV></DIV>&gt; &gt; I currently have little knowledge of the standard library and i am 
<DIV></DIV>&gt; &gt; currrently learning about it (currently reading 16 chapter of TC++PL 
<DIV></DIV>&gt; &gt; Special Edition). But with as many as i know so far you can do many 
<DIV></DIV>&gt; &gt; things with vectors: 
<DIV></DIV>&gt; 
<DIV></DIV>&gt; Oh, I know. They're wonderful-looking things. I'm currently only 
<DIV></DIV>&gt;using them as fancy dynamic arrays. 
<DIV></DIV>&gt; But while you can do a lot with vectors, vectors can do a lot with 
<DIV></DIV>&gt;you. I had Vec.size() in a conditional, and the conditional 
<DIV></DIV>&gt;consistently got it wrong. It worked, however, when I replaced 
<DIV></DIV>&gt;Vec.size() with a variable, Size, which had been intialized to 
<DIV></DIV>&gt;Vec.size() a line before. 
<DIV></DIV>&gt; That's only one reason I'm very cautious with vectors. 
<DIV></DIV>&gt; 
<DIV></DIV>&gt; &gt; Anyway i think it is our lack of knowledge, not vectors. When i finish 
<DIV></DIV>&gt; &gt; the 16th chapter i will resend an email telling you how you can to 
<DIV></DIV>&gt; &gt; assignments using vector constructors. 
<DIV></DIV>&gt; 
<DIV></DIV>&gt; There's a saying that goes 'It's a poor workman who blames his tools.' 
<DIV></DIV>&gt;And many times it's been my mistake; I'm a poor workman. But there 
<DIV></DIV>&gt;are other times when I've caught something funny going on. (push_back() 
<DIV></DIV>&gt;refusing to work was one of them.) 
<DIV></DIV>&gt; 
<DIV></DIV>&gt; &gt; I am confident that standard containers are better than built in arrays. 
<DIV></DIV>&gt; 
<DIV></DIV>&gt; Absolutely true: the reason I'm using vectors is because arrays are 
<DIV></DIV>&gt;/worse./ The only thing I think arrays have to recommend them is that 
<DIV></DIV>&gt;they can be intialized like so: 
<DIV></DIV>&gt; 
<DIV></DIV>&gt; char* frogs[4] = { "Green", "Tree", "Bull", "Muppet" }; 
<DIV></DIV>&gt; 
<DIV></DIV>&gt; (Yes, I know char* is frowned upon, but I've found some interesting 
<DIV></DIV>&gt;traps trying to initialize a string to a string constant of the form "Blah" 
<DIV></DIV>&gt;when passed as an argument.) 
<DIV></DIV>&gt; For my project, in which certain subclasses have great tracts of 
<DIV></DIV>&gt;constant data, this kind of initialization would be ideal. 
<DIV></DIV>&gt; 
<DIV></DIV>&gt; &gt; You can overload an operator as a global function 
<DIV></DIV>&gt; &gt; e.g. 
<DIV></DIV>&gt; &gt; vector<INT> &amp;operator=(vector<INT>&amp;a, const vector<INT> &amp;b) 
<DIV></DIV>&gt; &gt; { ... } 
<DIV></DIV>&gt; 
<DIV></DIV>&gt; Thank you :) 
<DIV></DIV>&gt; 
<DIV></DIV>&gt; &gt; or better define it as a template: 
<DIV></DIV>&gt; &gt; 
<DIV></DIV>&gt; &gt; template <CLASS T>
<DIV></DIV>&gt; &gt; vector<T> &amp;operator=(vector<T> &amp;a, const vector<T> &amp;b) 
<DIV></DIV>&gt; &gt; { ... } 
<DIV></DIV>&gt; 
<DIV></DIV>&gt; Templates I'm somewhat wary of; I'll deal with them when I have 
<DIV></DIV>&gt;to. Until then I'll stick with learning the ins and outs of what I /do/ 
<DIV></DIV>&gt;know. 
<DIV></DIV>&gt; 
<DIV></DIV>&gt; &gt; Yes, me too. But C++ is 10000% better. I suggest "The C++ Programming 
<DIV></DIV>&gt; &gt; Language" 3rd edition or Special Edition by Bjarne Stroustrup (the 
<DIV></DIV>&gt; &gt; creator of C++). 
<DIV></DIV>&gt; 
<DIV></DIV>&gt; Unfortunately, that's beyond my resources. I don't have the money and the 
<DIV></DIV>&gt;demand in the university/city library for books that teach C++ is total. 
<DIV></DIV>&gt;I've 
<DIV></DIV>&gt;only managed to scrounge the texts I'm working with by good fortune. 
<DIV></DIV>&gt; And despite what I might say, C++ is 10,000% better. Partially, I think, 
<DIV></DIV>&gt;because the old Kernighan and Ritchie paradigm of 'only stupid people make 
<DIV></DIV>&gt;mistakes - are you a stupid person?' has been replaced by the strong-type- 
<DIV></DIV>&gt;checking 'Everyone makes mistakes, we'll help you catch them' theory. 
<DIV></DIV>&gt; 
<DIV></DIV>&gt; &gt; It is better. :) 
<DIV></DIV>&gt; 
<DIV></DIV>&gt;You've said it three times now - it must be true! 
<DIV></DIV>&gt; 
<DIV></DIV>&gt;--Devin Carless 
<DIV></DIV>&gt; 
<DIV></DIV>&gt; 
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