How to format string in Ruby using printf/sprintf

Question

I want to create a table:

Iterations                      Value
         1                      123  
         2                      124
        ..                      
       100                      124212
       101                      1242142

If I'm able to do so, do you know which website for reference is good for Ruby?

Community · Accepted Answer · 2017-05-23 11:53:56Z

2

Already asked here: Is there a Ruby equivalent to the C++ std::setw(int) function?

puts "%10s" % ["foo"]  # => "       foo"
puts "%-10s" % ["bar"] # => "foo       "

edited May 23, 2017 at 11:53

CommunityBot

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answered Jan 31, 2014 at 1:08

LukeS

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Comments

Benoît · Accepted Answer · 2014-01-31 01:24:29Z

1

You can use rjust or ljust.

"123".rjust(10, '0')
#=> "0000000123"
"123".ljust(10, '0')
#=> "1230000000"

answered Jan 31, 2014 at 1:24

Benoît

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