Return string directly from the class ROW

#1

Hi,=20

I wonder whether it is a good way to return the "raw string" directly=20
from the class ROW. For example, one line line can be added to the=20
row.h=20

class ROW ...=20
{=20
public:=20

// The suggestion function. Return the "raw string"=20
const std::string & raw_string ( int i ) const { return data.at(i); }=20

}=20

I find it is handy to handle the result of a blob column in this way.

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#2

Oh, sorry. I copied wrong code from row.h. It should be:

const std::string & raw_string ( int i ) const {=20
return data.at(i);=20
}

On 8/4/05, P=E5l Brattberg <pal (AT) eminds (DOT) se> wrote:

Quote:

Yingbo Miao wrote:
I wonder whether it is a good way to return the "raw string" directly
from the class ROW. For example, one line line can be added to the row.h
=20
How about the following, already present i row.h?
=20
// Return the value of a field given its index, in raw form.
const char* raw_data(int i) const
{
return data_[i].data();
}
=20
What are you missing in this?
=20
/ p=E5l
=20
=20
=20
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om
=20

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#3

Hi,

I misunderstood Pal's post. Sorry again for that.

Using raw_data(), we only get a char * without knowing the length of
it. In the mysql++ example, we see some "complicate" way to get the
length. I think we can avoid it by directly returning the std::string
object. That is why I suggest the new function *raw_string()*.

- Yingbo

On 8/4/05, Yingbo Miao <yingbo (AT) gmail (DOT) com> wrote:

Quote:

Oh, sorry. I copied wrong code from row.h. It should be:
=20
const std::string & raw_string ( int i ) const {
return data.at(i);
}
=20
=20
On 8/4/05, P=E5l Brattberg <pal (AT) eminds (DOT) se> wrote:
Yingbo Miao wrote:
I wonder whether it is a good way to return the "raw string" directl=
y
from the class ROW. For example, one line line can be added to the row.=
h

How about the following, already present i row.h?

// Return the value of a field given its index, in raw form.
const char* raw_data(int i) const
{
return data_[i].data();
}

What are you missing in this?

/ p=E5l

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#4

Yingbo Miao wrote:

Quote:

I wonder whether it is a good way to return the "raw string" directly
from the class ROW. For example, one line line can be added to the
row.h

class ROW ...
{
public:

// The suggestion function. Return the "raw string"
const std::string & raw_string ( int i ) const { return data.at(i); }

Sorry for the long delay, but I've applied a patch for this. It'll
appear in MySQL++ 2.2. Thanks for the suggestion!

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Return string directly from the class ROW

mailing.database.mysql-plusplus mailing.database.mysql-plusplus

Return string directly from the class ROW - 08-03-2005 , 08:04 PM

Re: Return string directly from the class ROW - 08-04-2005 , 10:27 AM

Re: Return string directly from the class ROW - 08-04-2005 , 03:13 PM

Re: Return string directly from the class ROW - 01-12-2007 , 12:41 PM