Sorting

[bismitapadhy]

I have value like

abc1
abc2
abc10
abc100
bcd5
abcd1
abcd2
abc3
zbc1
xyz1

how can i sort it so that both text value and numeric value will be sorted. So that i will get the result like:

abc1
abc2
abc3
abc10
abc100
abcd1
abcd2
bcd5
xyz1
zbc1

I.e. i want both alpha value and numeric value will be sorted.

[wysota]

These situations are not a problem as a simple sort will do this. This becomes a problem:

abc13
abc103

Do you want it sorted this way or the other way (103 first, then 13)?

Anyway, use qSort() and provide a custom implementation of the LessThan functor

[bismitapadhy]

I am using Qsort , but how can i sort, which should be sorted in both alphabetically and numeric value?
Please send me the code.

[faldzip]

I am using Qsort , but how can i sort, which should be sorted in both alphabetically and numeric value?

Read again what Wysota posted:

use qSort() and provide a custom implementation of the LessThan functor

Run QtAssistant and read about qSort and QString to get know how to extract numeric part of your string. Probably it could be done easy with QRegExp. Then implement your own LessThan functor.

Please send me the code.

Please send me fresh donuts.

[JohannesMunk]

Question already answered in full length here:

http://www.qtcentre.org/threads/2141...930#post130930

Johannes

[JohannesMunk]

Please send me fresh donuts.

LOL! Made my day!

You are right. That "give me" attitude is hardly the nicest way of asking for help.

But who knows? Maybe it's just a language barrier?

Johannes

[faldzip]

You are right. That "give me" attitude is hardly the nicest way of asking for help.

But who knows? Maybe it's just a language barrier?

Maybe but maybe not :P
If it is just a language barrier then I hope my answer would encourage to find better words than "give me" next time.
But I think that in many cases it is not only language. Half of the post can be answered by opening QtAssistant, finding required solution and rewriting it in QtCentre forum, sometimes with slightly changed example, just because the guy who started thread don't want to spend 10minutes reading documentation. And with "give me the code" attitude you don't learn anything. I know that because when I was starting to learn programming I wanted to have working code fast and was rewriting, copy-pasting code and then you have to do it every time because you have no idea how your code is working and why it is not working. And I learned programming on my studies but without doing additional exercises (besides those I had to do) at home I would know nothing. And Qt has a really good documentation and it has nice tool out of the box (QtAssistant) to allow you easily get anything you want about Qt classes. Assistant is running almost all the time on my computer so I can check the way I should use the Qt classes at any moment. It's icon is placed next to the web browser icon on my quick launch bar :] And on browser's bookmarks bar there is a cppreference.com button so I can check basic C/C++ functions, classes because it takes much less time then making new thread on forum and waiting for answer...

[JohannesMunk]

I agree with you, that copy pasting code without even reading it, doesn't help. But that's up to the reader.

I generally agree that, if someone asks for a fish its usually better to teach him fishing. But giving him the fish that you fished together, is acceptable too, I think :->

On the other hand the question here (natural sorting of strings, see the other posts of OP) can not be answered with Qt Assistant. And without knowing the right term not with google either.

What disturbs me, though, is that because some people exploit this kind of forum as the chance to get everything without any hasle at all and without even saying thanks afterwards, the tone of the answers gets quite rough, sometimes. And that's not a healthy development, I think. Neither for the stress level of regular posters, nor for the forums atmosphere.

Johannes

[faldzip]

On the other hand the question here (natural sorting of strings, see the other posts of OP) can not be answered with Qt Assistant. And without knowing the right term not with google either.

But typing "QString sorting" in search line edit of this forum and pressing enter will give the topic which you linked few posts above, where the solution was discussed and already done. Using compareNames() function in qSort() requires rather C++
only knowledge. So I almost agree with your one point - no need to use QtAssistant to get the solution, because it is already here.
Another thing is that what people cannot notice easily is that Qt is a C++ library, not programming language, so you are not programming in Qt, you are programming in C++ with Qt. So the simple implication is that you have to learn C++ to use Qt. And you don't have to know everything about C++, but there is some subset of C++ features which are commonly used and covered by almost every book and tutorial.
And this is the case here also... The solution is given, now you have to use it regarding C++ syntax (It is even mention how in above linked thread).

[wysota]

Half of the post can be answered by opening QtAssistant, finding required solution and rewriting it in QtCentre forum

Half? I'd say "about 90%". The rest just requires some experience.

I agree with you, that copy pasting code without even reading it, doesn't help. But that's up to the reader.

That would be true if he had to pay some money for the solution to the person who provided it. But if answers are free then why bother looking for them yourself if there are people who will do it for you? So I'd say it's really up to the person providing the solution. Next time he/she simply won't bother doing that at all.

[JohannesMunk]

That would be true if he had to pay some money for the solution to the person who provided it. But if answers are free then why bother looking for them yourself if there are people who will do it for you?

What would money change? Would it take away the feeling of being exploited? I think, that can only be cured by an honest "thank you". And some people are kind enough to say it. We should have a law for it, though :->

So I'd say it's really up to the person providing the solution. Next time he/she simply won't bother doing that at all.

What somebody does with something you helped him with is entirely his thing. I think that's something fundamental to true help. Think of somebody saving another one's life. He owes him a big thank you. But the saver doesn't own the saved person's life afterwards. Otherwise its not help, but some kind of extortion in disguise.

With helping the situation is always a little pre-loaded.. Because as helper you do expect some kind of gratitude. If that gratitude fails your expectations or is replaced by bold demands, trouble is underway. I don't have a solution for that. I just tend to avoid those people afterwards. And try to keep my hopes up, that the next person will not fail me.

Good night!

Johannes

[wysota]

What would money change? Would it take away the feeling of being exploited?

It's the other way round. You'd ask questions more carefully and try doing something yourself first if you had to pay (even a small fee) for each answer you get.

What somebody does with something you helped him with is entirely his thing.

Oh, no argument here. Of course provided he doesn't violate any licence.

I think that's something fundamental to true help. Think of somebody saving another one's life. He owes him a big thank you. But the saver doesn't own the saved person's life afterwards. Otherwise its not help, but some kind of extortion in disguise.

Would you jump from a cliff if you knew someone would save you? Would you jump if you didn't know if someone would be there to save you?

Of course you can also look at things from the other person's perspective: If someone would be jumping off the cliff all the time, wouldn't you grow tired of saving him constantly and telling him not to do it again?

[totem]

But typing "QString sorting" in search line edit of this forum and pressing enter will give the topic [...]

Speaking of the search line edit (as i see we are not speaking of qstring sort anymore ), do you now how to combine terms ? I tried

QString + sort

QString + sort

To copy to clipboard, switch view to plain text mode 

and

QString AND sort

QString AND sort

To copy to clipboard, switch view to plain text mode 

but none of these gave me the actual answer, that is to say a thread title containing both "QString" and "sort" words. Is there an explanation somewhere ? (didn't find it)

[faldzip]

I would type just:

QString sort

[totem]

I would type just QString sort

and it would not give you post with these 2 words, but with one of them. At least it doesn't work for me

@wysota : speaking of QString sorting was just an example. My real question is actually how to combine terms in search line.

[wysota]

Have you seen the "Similar threads" list on the bottom of this page? It's worth to start your search there.