Re: dynamic format specifier possible?

[forkit via Digitalmars-d-learn]

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.

Re: dynamic format specifier possible?

[Ali Çehreli via Digitalmars-d-learn]

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

dynamic format specifier possible?

[forkit via Digitalmars-d-learn]

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]
}

// ---