I'm trying to loop through and match the following string:
@custom_channels = { cnn: 2, abc: 90 }
I then want to be able to check/match against each and return the channel number (e.g. 90):
listen_for /channel to (#{@custom_channels.join('|')})/i do |name|
change_channel @custom_channels[name.downcase]
end
I keep getting the following error:
scraper.rb:5:in `<main>': undefined method `join' for {:cnn=>2, :abc=>90}:Hash (NoMethodError)
If I understand what you are asking for:
@custom_channels = { cnn: 2, abc: 90 }
channel_names = @custom_channels.keys.map(&:to_s)
listen_for /channel to (#{Regexp.union(channel_names)})/i do |name|
change_channel @custom_channels[name.to_sym]
end
{cnn: 2, abc: 90}.keys #=> [:cnn, :abc] Regexp.union([:cnn,:abc].map(&:to_s)) #=> /cnn|abc/
#{Regexp.union({ cnn: 2, abc: 90 }} it didn't like @custom_channels.keys in there.Try this one:
1.9.3p0 :007 > channels = {:cnn=>2, :abc=>90}
=> {:cnn=>2, :abc=>90}
1.9.3p0 :008 > channels.keys
=> [:cnn, :abc]
1.9.3p0 :009 > channels.keys.each do |name|
1.9.3p0 :010 > puts channels[name]
1.9.3p0 :011?> end
2
90
=> [:cnn, :abc]
@custom_channels[:cnn] #=> 2
joinhere? What are you trying to achieve with this?