what is the correct syntax to interpolate an object into a double quoted string?

Question

"please contact your <%[email protected] %>  mentor"

I am using the above syntax and it is wrong.

Can anyone please tell me the correct syntax for interpolating @user.name into a string using " ".

if we answered your question can you accept one of the answers please? — loosecannon
– loosecannon, Commented Jun 3, 2011 at 18:05

Andrew Grimm · Accepted Answer · 2011-06-09 00:11:21Z

3

"please contact your #{@user.name }  mentor"

if you just want to call .to_s on @user you can do

"please contact your #@user  mentor"

and omit the {}

<%=...%> is for eRB files, use "#{}" to substitute in quotes

edited Jun 9, 2011 at 0:11

Andrew Grimm

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answered Jun 3, 2011 at 15:25

loosecannon

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Dylan Markow · Accepted Answer · 2011-06-03 15:25:21Z

3

The <%= %> format is for erb template files. If you want to do string interpolation within standard Ruby code, use the #{ } format instead.

"please contact your #{@user.name} mentor"

answered Jun 3, 2011 at 15:25

Dylan Markow

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3 Comments

user659068 Over a year ago

This is for double quote..what is the syntax for signle quote??

Jeremy B. Over a year ago

You can't do it with single quotes, Ruby will only apply interpolation with double quotes.

BitOfUniverse Over a year ago

'please contact your ' + @user.name + ' mentor' - for single quotes :), but this is not interpolation, this is concatenation.

Jeremy B. · Accepted Answer · 2011-06-03 15:24:52Z

2

That is the correct syntax for an erb template. for ruby it is

"please contact your #{@user.name} mentor"

answered Jun 3, 2011 at 15:24

Jeremy B.

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