Add Parsing A CSV With Quotes In The Data as a ruby til

Author: jbranchaud

README.md

@@ -9,7 +9,7 @@ and pairing with smart people at Hashrocket.
 
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-_928 TILs and counting..._
+_929 TILs and counting..._
 
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@@ -752,6 +752,7 @@ _928 TILs and counting..._
 - [Or Operator Precedence](ruby/or-operator-precedence.md)
 - [Override The Initial Sequence Value](ruby/override-the-initial-sequence-value.md)
 - [Parallel Bundle Install](ruby/parallel-bundle-install.md)
+- [Parsing A CSV With Quotes In The Data](ruby/parsing-a-csv-with-quotes-in-the-data.md)
 - [Pass A Block To Count](ruby/pass-a-block-to-count.md)
 - [Passing Arbitrary Methods As Blocks](ruby/passing-arbitrary-methods-as-blocks.md)
 - [Passing Arguments To A Rake Task](ruby/passing-arguments-to-a-rake-task.md)

ruby/parsing-a-csv-with-quotes-in-the-data.md

@@ -0,0 +1,25 @@
+# Parsing A CSV With Quotes In The Data
+
+If a CSV contains unescaped quote characters--like you might find in a CSV full
+of measurement data--then Ruby's
+[CSV](https://ruby-doc.org/stdlib-2.6.1/libdoc/csv/rdoc/CSV.html) library will
+be unable to parse it.
+
+Here is what happens with a line of CSV about some lumber:
+
+```ruby
+> require 'csv'
+> CSV.parse_line('oak,2",4"')
+CSV::MalformedCSVError (Illegal quoting in line 1.)
+```
+
+However, we can enable some more lenient, liberal parsing of the data with the
+`liberal_parsing` argument.
+
+```ruby
+> require 'csv'
+> CSV.parse_line('oak,2",4"', liberal_parsing: true)
+=> ["oak", "2\"", "4\""]
+```
+
+[source](https://blog.bigbinary.com/2016/11/22/ruby-2-4-introduces-liberal_parsing-option-for-parsing-bad-csv-data.html)