Re: Best way to write the vector content to a file.

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From	Ian Collins <ian-news@hotmail.com>
Newsgroups	comp.lang.c++
Subject	Re: Best way to write the vector content to a file.
Date	Tue, 20 Sep 2011 15:12:19 +1200
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On 09/20/11 03:05 PM, sravanreddy001 wrote:
> Hi,
>
> Can anyone give the best way (faster) to write the vector contents to a file?
>
> Is there a better way to do it than below method?
>
>          for(unsigned i=0;i<terms.size();i++){
> 		sprintf(temp,"%d %s\n",i,terms[i].c_str());
>   		ids_n_terms = ids_n_terms + temp;
> 	}

Where do you do the write?

> Is the string addition a very expensive operation? (will a new memory allocation takes place)
>
> there are around 5,00,000 (strings) in the vector, and these have to stored in
> <id term>  format.

You will probably be I/O limited, so optimising your code won't make any 
significant difference.

-- 
Ian Collins

Thread

Best way to write the vector content to a file. sravanreddy001 <sravanreddy001@gmail.com> - 2011-09-19 20:05 -0700
  Re: Best way to write the vector content to a file. Ian Collins <ian-news@hotmail.com> - 2011-09-20 15:12 +1200
  Re: Best way to write the vector content to a file. sravanreddy001 <sravanreddy001@gmail.com> - 2011-09-19 20:28 -0700
    Re: Best way to write the vector content to a file. Ian Collins <ian-news@hotmail.com> - 2011-09-20 15:37 +1200
      Re: Best way to write the vector content to a file. sravanreddy001 <sravanreddy001@gmail.com> - 2011-09-19 20:50 -0700
        Re: Best way to write the vector content to a file. Ian Collins <ian-news@hotmail.com> - 2011-09-20 16:03 +1200
      Re: Best way to write the vector content to a file. sravanreddy001 <sravanreddy001@gmail.com> - 2011-09-19 20:47 -0700
        Re: Best way to write the vector content to a file. Ian Collins <ian-news@hotmail.com> - 2011-09-20 16:09 +1200
    Re: Best way to write the vector content to a file. sravanreddy001 <sravanreddy001@gmail.com> - 2011-09-19 20:29 -0700
  Re: Best way to write the vector content to a file. Juha Nieminen <nospam@thanks.invalid> - 2011-09-20 06:44 +0000
  Re: Best way to write the vector content to a file. Goran <goran.pusic@gmail.com> - 2011-09-20 00:37 -0700
    Re: Best way to write the vector content to a file. Ian Collins <ian-news@hotmail.com> - 2011-09-20 19:45 +1200
      Re: Best way to write the vector content to a file. Goran <goran.pusic@gmail.com> - 2011-09-20 02:01 -0700
  Re: Best way to write the vector content to a file. Rui Maciel <rui.maciel@gmail.com> - 2011-09-20 10:56 +0100
  Re: Best way to write the vector content to a file. Fulvio Esposito <esposito.fulvio@gmail.com> - 2011-09-20 04:03 -0700
  Re: Best way to write the vector content to a file. sravanreddy001 <sravanreddy001@gmail.com> - 2011-09-20 05:00 -0700
    Re: Best way to write the vector content to a file. Goran <goran.pusic@gmail.com> - 2011-09-20 06:55 -0700
    Re: Best way to write the vector content to a file. Paavo Helde <myfirstname@osa.pri.ee> - 2011-09-20 13:39 -0500
  Re: Best way to write the vector content to a file. sravanreddy001 <sravanreddy001@gmail.com> - 2011-09-20 17:50 -0700

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