Number formatting

ruby-talk
1

folks - can't quite figure this one out...

foo = 5
bar = 10

basically - when i go to print out the numbers - i want to format 'foo'
with a leding zero so that it reads '05' and is aesthetically pleasing
when compared to a double-digit number - such as bar: '10'.

essentially looking to get:

05
10
25
03

···

--
Posted via http://www.ruby-forum.com/.

2

foo = 5
puts "%02d" % foo

--------------------------------------------------------------- String#%
     str % arg => new_str

···

On Fri, Jun 01, 2007 at 01:03:26AM +0900, Cory wrote:

folks - can't quite figure this one out...

foo = 5
bar = 10

basically - when i go to print out the numbers - i want to format 'foo'
with a leding zero so that it reads '05' and is aesthetically pleasing
when compared to a double-digit number - such as bar: '10'.

essentially looking to get:

05
10
25
03

------------------------------------------------------------------------
     Format---Uses _str_ as a format specification, and returns the
     result of applying it to _arg_. If the format specification
     contains more than one substitution, then _arg_ must be an +Array+
     containing the values to be substituted. See +Kernel::sprintf+ for
     details of the format string.

        "%05d" % 123 #=> "00123"
        "%-5s: %08x" % [ "ID", self.id ] #=> "ID : 200e14d6"

3

folks - can't quite figure this one out...

foo = 5
bar = 10

basically - when i go to print out the numbers - i want to
format 'foo'
with a leding zero so that it reads '05' and is aesthetically
pleasing when compared to a double-digit number - such as bar: '10'.

sprintf('%02d', foo)

- donald

4

Try using Kernel#printf.

irb(main):001:0> printf("%02d", 5)
05=> nil

···

On 5/31/07, Cory <coryw@americanmonkey.com> wrote:

folks - can't quite figure this one out...

foo = 5
bar = 10

basically - when i go to print out the numbers - i want to format 'foo'
with a leding zero so that it reads '05' and is aesthetically pleasing
when compared to a double-digit number - such as bar: '10'.

--
Luis Parravicini
http://ktulu.com.ar/blog/