What is Ruby equivalent of Python's `s= "hello, %s. Where is %s?" % ("John","Mary")`

python ruby string-formatting
TIMEX picture TIMEX · Aug 24, 2010 · Viewed 80.4k times · Source

In Python, this idiom for string formatting is quite common

s = "hello, %s. Where is %s?" % ("John","Mary")

What is the equivalent in Ruby?

Answer

AboutRuby picture AboutRuby · Aug 24, 2010

The easiest way is string interpolation. You can inject little pieces of Ruby code directly into your strings.

name1 = "John"
name2 = "Mary"
"hello, #{name1}.  Where is #{name2}?"

You can also do format strings in Ruby.

"hello, %s.  Where is %s?" % ["John", "Mary"]

Remember to use square brackets there. Ruby doesn't have tuples, just arrays, and those use square brackets.

Related questions

Does Python do variable interpolation similar to "string #{var}" in Ruby?

In Python, it is tedious to write: print "foo is" + bar + '.' Can I do something like this in Python? print "foo is #{bar}."

Read More
What does Ruby have that Python doesn't, and vice versa?

There is a lot of discussions of Python vs Ruby, and I all find them completely unhelpful, because they all turn around why feature X sucks in language Y, or that claim language Y doesn't have X, although in fact …

Read More
converting epoch time with milliseconds to datetime

I have used a ruby script to convert iso time stamp to epoch, the files that I am parsing has following time stamp structure: 2009-03-08T00:27:31.807 Since I want to keep milliseconds I used following ruby code to convert …

Read More