How can I insert a variable in a string in .js, coming from a ruby example [duplicate]

Question

In ruby you can insert variables into a string like this:

x = "sake"
puts "I like #{x}"
$"I like sake"

For example:

def what_i_like(word)
  "I like #{word}"
end

Is there a similar way to do this in javascript?

What I'm doing now is this:

x = "sake"
"I like" + x + ". "

I think your question is exactly the same as this one: stackoverflow.com/questions/610406/… — Alexandre
– Alexandre, Commented Dec 14, 2010 at 1:40
You need to declare variable var v = "sake" with a word reserved 'var', do you wrote this? — Cloudson
– Cloudson, Commented Dec 14, 2010 at 1:45
You should declare your variables with 'var', otherwise you pollute the global namespace. — Samo
– Samo, Commented Dec 14, 2010 at 17:55

Alex Webb · Accepted Answer · 2015-04-23 19:34:00Z

0

This feature is supported in vanilla Javascript in the console.log function. The format would work as follows:

console.log('Hey %s', 'cat');

which results in

"Hey cat"

If you happen to be using Node.js, this functionality is supported out of box with the util.format(...) function, working pretty much the same way except that it just returns a string.

%s = string

%d = integer or float

%j = stringifyable object

Imo this approach might be slightly more idiomatic javascript than using an external library that simulates a ruby or C syntax, IF you are already using Node.js in some capacity.

https://nodejs.org/api/util.html#util_util_format_format

answered Apr 23, 2015 at 19:34

Alex Webb

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