How can I control starting (left) indentation for printf? Pickaxe did not
yield an answer. Or do I have to loop putting out spaces with
IO#putc " "?
Thanks!
Shouldn’t sprintf truncate strings if needed?
sprintf(“%10s”, “Hello”) → " Hello": correct padding
sprintf(“%3s”, “Hello”) → “Hello”: no truncation?
Bug? Operator error?
“Its Me” itsme213@hotmail.com wrote in message
news:cuyhc.9568$hR1.4441@fe2.texas.rr.com…
···
How can I control starting (left) indentation for printf? Pickaxe did not
yield an answer. Or do I have to loop putting out spaces with
IO#putc " "?Thanks!
Its Me wrote:
How can I control starting (left) indentation for printf? Pickaxe did not
yield an answer. Or do I have to loop putting out spaces with
IO#putc " "?Thanks!
I would do
indent = 3
message = “Hello, world”
printf “%#{indent}s%s\n”, “”, message
or
indent = 3
message = “Hello, world”
printf “#{’ '*indent}%s”, message
Gennady.
“Its Me” itsme213@hotmail.com writes:
Shouldn’t sprintf truncate strings if needed?
No. From the UNIX manual page printf(3):
In no case does a non-existent or small field width cause
truncation of a field; if the result of a conversion is
wider than the field width, the field is expanded to
contain the conversion result.
-Mark
Its Me wrote:
Shouldn’t sprintf truncate strings if needed?
sprintf(“%10s”, “Hello”) → " Hello": correct padding
sprintf(“%3s”, “Hello”) → “Hello”: no truncation?
If you need truncation you should use
sprintf("%3.3s,“Hello”)
The precision field for strings in C printf (and in Ruby’s consequently)
is just that – specifies the maximum size of a filed.
Gennady.
···
Bug? Operator error?
“Its Me” itsme213@hotmail.com wrote in message
news:cuyhc.9568$hR1.4441@fe2.texas.rr.com…How can I control starting (left) indentation for printf? Pickaxe did not
yield an answer. Or do I have to loop putting out spaces with
IO#putc " "?Thanks!
Thank you, thank you, thank you!
I don’t know how long it would have taken me to figure that out …
“Gennady” gfb@tonesoft.com wrote in message
news:4086BE43.1000606@tonesoft.com…
Its Me wrote:
How can I control starting (left) indentation for printf? Pickaxe did
not
···
yield an answer. Or do I have to loop putting out spaces with
IO#putc " "?Thanks!
I would do
indent = 3
message = “Hello, world”
printf “%#{indent}s%s\n”, “”, messageor
indent = 3
message = “Hello, world”
printf “#{’ '*indent}%s”, messageGennady.
“Gennady” gfb@tonesoft.com schrieb im Newsbeitrag
news:4086BE43.1000606@tonesoft.com…
Its Me wrote:
How can I control starting (left) indentation for printf? Pickaxe did
not
yield an answer. Or do I have to loop putting out spaces with
IO#putc " "?Thanks!
I would do
indent = 3
message = “Hello, world”
printf “%#{indent}s%s\n”, “”, messageor
indent = 3
message = “Hello, world”
printf “#{’ '*indent}%s”, message
printf style is rather this:
irb(main):007:0> printf “%*d”, 10, 5
5=> nil
irb(main):008:0> printf “%*d”, -10, 5
5 => nil
robert
Gennady wrote:
Its Me wrote:
Shouldn’t sprintf truncate strings if needed?
sprintf(“%10s”, “Hello”) → " Hello": correct padding
sprintf(“%3s”, “Hello”) → “Hello”: no truncation?If you need truncation you should use
sprintf("%3.3s,“Hello”)
Correction:
sprintf(“%3.3s”,“Hello”)
(missed the quote)
···
The precision field for strings in C printf (and in Ruby’s consequently)
is just that – specifies the maximum size of a filed.Gennady.
Bug? Operator error?
“Its Me” itsme213@hotmail.com wrote in message
news:cuyhc.9568$hR1.4441@fe2.texas.rr.com…How can I control starting (left) indentation for printf? Pickaxe did
not
yield an answer. Or do I have to loop putting out spaces with
IO#putc " "?Thanks!
Robert Klemme wrote:
printf style is rather this:
irb(main):007:0> printf “%*d”, 10, 5
5=> nil
irb(main):008:0> printf “%*d”, -10, 5
5 => nilrobert
Hmm, thanks. I forgot about this possibility.
Gennady.