Remove Data from basic::string

[Mike Copeland]

What is a good way to remove a character from a basic::string?
For example, I have the following:

basic::string myString = "123 E, Main Street";

and I wish to remove (delete) the "," from it.
Does anyone know a way to do this? TIA

[Tim Love]

mrc...@cox.net (Mike Copeland) writes:

I think the following will work (with a few includes, etc). Up to you whether you think it's a good way.

string::iterator new_end =remove_if(myString.begin(), myString.end(), bind2nd(equal_to<char>(), ','));
myString.erase(new_end, myString.end());

[Pascal J. Bourguignon]

mrc...@cox.net (Mike Copeland) writes:

I don't know basic::string. Perhaps you can convert them to std::string?
Then you could do:

{
std::string temp=myString;
std::string::iterator it=temp.find(',');
if(it!=temp.end()){
temp.erase(it);
}
myString=temp;
}

--
__Pascal Bourguignon__

[Vladyslav Lazarenko]

RTFM! http://www.sgi.com/tech/stl/basic_string.html

[Gernot Frisch]

>
> string::iterator new_end =remove_if(myString.begin(), myString.end(),
> bind2nd(equal_to<char>(), ','));
> myString.erase(new_end, myString.end());

Awesome! Thanks a lot for sharing, I never stumbled upon bind2nd() before.

[James Kanze]

On Apr 1, 4:51 pm, t...@eng.cam.ac.uk (Tim Love) wrote:

Isn't that doing things the hard way? There are times when
bind2nd and such are necessary, but the above does exactly the
same thing as:

myString.erase(
std::remove( myString.begin(), myString.end(), ',' ),
myString.end() ) ;

--
James Kanze (GABI Software) email:james...@gmail.com
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[James Kanze]

On Apr 1, 4:54 pm, p...@informatimago.com (Pascal J. Bourguignon)
wrote:

Which raises an interesting question: is temp.erase(it)
guaranteed to work (i.e. do nothing) when it == temp.end()? I
would expect it to, but I can't figure out whether it is
guaranteed or not from the text in the standard.

(There are also a couple of questions concerning what he really
wants to do, of course. Remove the first comma? Remove all
commas?, remove some specific character that he has found by
other means?)

[Mike Copeland]

> > > basic::string myString = "123 E, Main Street";
> > > and I wish to remove (delete) the "," from it.
> > > Does anyone know a way to do this? TIA
> > I don't know basic::string. Perhaps you can convert them to
> > std::string? Then you could do:
> > {

> > std::string temp=3DmyString;
> > std::string::iterator it = temp.find(',');
> > if(it!=3Dtemp.end()){
> > temp.erase(it);
> > }
> > myString=3Dtemp;

> > }
>
> Which raises an interesting question: is temp.erase(it)
> guaranteed to work (i.e. do nothing) when it == temp.end()? I
> would expect it to, but I can't figure out whether it is
> guaranteed or not from the text in the standard.
>
> (There are also a couple of questions concerning what he really
> wants to do, of course. Remove the first comma? Remove all
> commas?, remove some specific character that he has found by
> other means?)

FWIW, I want to remove/delete _all_ the commas in the string. My
example didn't go into that, because I wasn't aware of any STL function
that would delete a specific character from a string of characters. The
myString.erase() function accomplishes what I need (but didn't know
about), and I was able to modify the code to process multiples. I
tested it with most pathological situations (e.g. comma in first and
last positions), and it seems to do what I need.
Thanks to everyone who contributed!