• forkit (13/13) Jan 23 2022 I would like to calculate the width of the format specifier
• =?UTF-8?Q?Ali_=c3=87ehreli?= (10/12) Jan 23 2022 You use an asterisk and provide the width as an argument. This one uses
• forkit (2/11) Jan 23 2022 perfect! thanks.

forkit <forkit gmail.com> writes:

I would like to calculate the width of the format specifier 
dynamically, at runtime.

e.g int WIDTH = something.length;

then my format specifier would be: %WIDTHs instead of %9s

// ---

module test;

import std;

void main()
{
     int val = 999000;
     writefln("[%9s]", val); // [   999000]
}

// ---

=?UTF-8?Q?Ali_=c3=87ehreli?= <acehreli yahoo.com> writes:

On 1/23/22 13:59, forkit wrote:
 I would like to calculate the width of the format specifier dynamically, 
 at runtime.

You use an asterisk and provide the width as an argument. This one uses 
the length of the name of the program:

import std;

void main(string[] args)
{
   int val = 999000;
   writefln("[%*s]", args.front.length, val); // [   999000]
}

Ali

forkit <forkit gmail.com> writes:

On Sunday, 23 January 2022 at 22:08:28 UTC, Ali Çehreli wrote:
 You use an asterisk and provide the width as an argument. This 
 one uses the length of the name of the program:

 import std;

 void main(string[] args)
 {
   int val = 999000;
   writefln("[%*s]", args.front.length, val); // [   999000]
 }

 Ali

perfect! thanks.