Groups | Search | Server Info | Keyboard shortcuts | Login | Register [http] [https] [nntp] [nntps]

Groups > comp.lang.c++ > #12607

Re: Force std::string Width

Show all headers | View raw

On 12/16/2011 7:34 PM, Sam wrote:
> Mike Copeland writes:
>
>> Is there any std::string function that will either force the value of
>> a variable to be no more than a maximum number of characters or fill it
>> if it's less? For example:
>>
>> std::string someStr1 = "The Phantom Spitter was here.";
>>
>> where I want 20, but _no more_ than 20, characters to be displayed. But
>> with:
>>
>> std::string someStr2 = "Kilroy here.";
>>
>> I want the output display to be 20 characters.
>> In other words, I want a substr of a string value if it's >20
>> characters, but I want to have the value "padded" when it's less than 20
>> characters. I know that setw() will pad/fill the data, but is there
>> something that will either fill or truncate a string to a specified
>> length, depending on its length? TIA
>
> s=(s+std::string(20, ' ')).substr(0, 20);
>
>

Oh, that's a nice one!  I'll have to remember that one!

Back to comp.lang.c++ | Previous | Next — Previous in thread | Next in thread | Find similar | Unroll thread

Thread

Force std::string Width mrc2323@cox.net (Mike Copeland) - 2011-12-16 19:08 -0700
  Re: Force std::string Width Sam <sam@email-scan.com> - 2011-12-16 21:34 -0600
    Re: Force std::string Width red floyd <no.spam.here@its.invalid> - 2011-12-16 20:15 -0800
      Re: Force std::string Width Juha Nieminen <nospam@thanks.invalid> - 2011-12-17 07:44 +0000
        Re: Force std::string Width red floyd <no.spam.here@its.invalid> - 2011-12-17 09:17 -0800
          Re: Force std::string Width Juha Nieminen <nospam@thanks.invalid> - 2011-12-19 10:18 +0000
  Re: Force std::string Width Paavo Helde <myfirstname@osa.pri.ee> - 2011-12-16 23:58 -0600

csiph-web