Convert array of strings to joined strings

Question

Input:

 array = ['A', 'B', 'C']

Desired output:

'A', 'B', 'C'

I'm using legato gem to chain google analytics filters. My method call looks like this:

response = KeywordRevenueData.results(profile, self.options).for_keywords(array)

I thought this would work,

array.map(&:inspect).join(", ")

but for some reason it doesn't.

EDIT: It works fine when I put the literal strings in the method call:

response = KeywordRevenueData.results(profile, self.options).for_keywords("A", "B", "C")

single or double quotes seem to work fine if they are literals in the method call

This works, but it produces string with double-quotes inside: `'"A", "B", "C"'` — Sergio Tulentsev, May 29 '13 at 23:48
Included a working example. Can't figure this out for the life of me — mnort9, May 29 '13 at 23:56
Fantastic, thank you! What does that do anyway? Make that an answer please so I can mark it as correct — mnort9, May 30 '13 at 00:00
That's the standard language feature to pass array items as method arguments. E.g. see here http://www.ruby-doc.org/docs/ProgrammingRuby/html/tut_methods.html#UC — Sergey Bolgov, May 30 '13 at 06:18

score 1 · Answer 1 · edited May 23 '17 at 11:57

1

You could use :

array.map{|l| "'" + l + "'"}.join(", ")

if you need to force the presence of surrounding quotes

This answer also has interesting suggestions :

edited May 23 '17 at 11:57

Community

answered May 29 '13 at 23:43

thibaultP

score 1 · Accepted Answer · answered May 30 '13 at 00:00

1

Use * to pass array elements as arguments:

response = KeywordRevenueData.results(profile, self.options).for_keywords(*array)  # Note the *

answered May 30 '13 at 00:00

Sergey Bolgov

2 Answers2