Look at #shift from CSV Class: The primary read method for wrapped Strings and IOs, a single row is pulled from the data source, parsed and returned as an Array of fields (if header rows are not used) An Example: require ‘csv’ # CSV FILE # name, surname, location # Mark, Needham, Sydney # David, … Read more
From the exception, it seems that json in the second response is an array with only one element, so the output of puts json is the same (brackets don’t get output with puts), but json[“string”] fails because [] expects an Integer to use as index. Check p json or that json.is_a?(Array) and if it is … Read more
To a first approximation: ActiveRecord::Base.connection.query_cache.clear
Try %% it might work to escape.
Programming Ruby mentions them in the chapter about strings. Related to %q{} and %Q{} is %{} which is the same as %Q{}. Also, the delimiters “{}” I show can be a matching pair of delimiters, so you could use [], (), etc. %q{} is the same as using single-quotes to delimit a string. %Q{} is … Read more
You need to use a double quote (“) instead of a single quote. So replace this: ‘\n’ with this: “\n” Read more about it here. You might want to use \r\n instead if you want your line-endings to be CRLF instead of LF (some Windows editors such as Notepad won’t see a LF linebreak).
This has already been shared in a comment, but just to provide a complete-ish answer… You have these tools at your disposal: x matches x exactly once x{a,b} matches x between a and b times x{a,} matches x at least a times x{,b} matches x up to (a maximum of) b times x* matches x … Read more
Regexp.new(Regexp.quote(‘http://www.microsoft.com/’)) Regexp.quote simply escapes any characters that have special regexp meaning; it takes and returns a string. Note that . is also special. After quoting, you can append to the regexp as needed before passing to the constructor. A simple example: Regexp.new(Regexp.quote(‘http://www.microsoft.com/’) + ‘(.*)’) This adds a capturing group for the rest of the path.
The response object actually contains the headers. See “Net::HTTPResponse” for more infomation. You can do: response[‘Cache-Control’] You can also call each_header or each on the response object to iterate through the headers. If you really want the headers outside of the response object, call response.to_hash
Translating @TuteC into ActiveRecord: sql=”SELECT id, COUNT(id) as quantity FROM types GROUP BY name HAVING quantity > 1″ #=> Type.select(“id, count(id) as quantity”) .group(:name) .having(“quantity > 1”)