Ruby Quiz #1 - Bonus - Three More Difficulty Levels (2, 3, 4) - Commas Inside Quotes and Double Up Quotes in Quotes, ...

[Gerald Bauer]

Hello,

Thanks for the first three entries - all passing the level 1 test. Yay!

If that was too easy :-) I added three more difficulty levels
to the challenge.[1]
.

### Level 2 - Commas Inside Quotes and Double Up Quotes in Quotes

Let's turn Shakespeare's "literal" Hamlet quote:

```
Hamlet says, "Seems," madam! Nay it is; I know not "seems."
```

into

```
1, "Hamlet says, ""Seems,"" madam! Nay it is; I know not ""seems."""
```

And the test reads:

``` ruby
def test_parse_level2
records = [["1", "Hamlet says, \"Seems,\" madam! Nay it is; I know
not \"seems.\""]]

assert_equal records, parse( <<TXT )
1, "Hamlet says, ""Seems,"" madam! Nay it is; I know not ""seems."""
TXT
end
```


### Level 3 - Unix/Ruby-Style Backslash Escapes

Lets add the "unix-style" escaping with backslashes (e.g. `\"` for `""`)
used by Ruby :-), PostgreSQL, MySQL and others
(when exporting database tables in CSV, for example):

```
1, "Hamlet says, \"Seems,\" madam! Nay it is; I know not \"seems.\""
```

And the test reads:

``` ruby
def test_parse_level3
records = [["1", "Hamlet says, \"Seems,\" madam! Nay it is; I know
not \"seems.\""]]

assert_equal records, parse( <<TXT )
1, "Hamlet says, \\"Seems,\\" madam! Nay it is; I know not \\"seems.\\""
TXT
end
```



### Level 4 - Single or Double? Mixed Quotes

Let's again get inspired by Ruby :-) -
see 210 Ways to Rome [2] and lets add single or double quotes.

```
1, "Hamlet says, 'Seems,' madam! Nay it is; I know not 'seems.'"
2, 'Hamlet says, "Seems," madam! Nay it is; I know not "seems."'
```

And the test reads:

``` ruby
def test_parse_level4
records = [[1, "Hamlet says, 'Seems,' madam! Nay it is; I know not 'seems.'"],
[2, 'Hamlet says, "Seems," madam! Nay it is; I know not "seems."']]

assert_equal records, parse( <<TXT )
1, "Hamlet says, 'Seems,' madam! Nay it is; I know not 'seems.'"
2, 'Hamlet says, "Seems," madam! Nay it is; I know not "seems."'
TXT
end
```


Happy hacking and data wrangling with Ruby.

[1] https://github.com/planetruby/quiz
[2] https://idiosyncratic-ruby.com/15-207-ways-to-rome.html

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[Frank J. Cameron]

Post by Gerald Bauer
Thanks for the first three entries - all passing the level 1 test. Yay!
If that was too easy :-) I added three more difficulty levels
to the challenge.[1]

$ ruby lib/001.rb
Run options: --seed 639
# Running:
.F..
Finished in 0.007014s, 570.3056 runs/s, 570.3056 assertions/s.
1) Failure:
RubyQuizTest#test_parse_level4 [/home/fjc/ruby-quiz/001/test.rb:68]:
--- expected
+++ actual
@@ -1 +1 @@
-[[1, "Hamlet says, 'Seems,' madam! Nay it is; I know not 'seems.'"], [2,
"Hamlet says, \"Seems,\" madam! Nay it is; I know not \"seems.\""]]
+[["1", "Hamlet says, 'Seems,' madam! Nay it is; I know not 'seems.'"],
["2", "Hamlet says, \"Seems,\" madam! Nay it is; I know not \"seems.\""]]
4 runs, 4 assertions, 1 failures, 0 errors, 0 skips

$ cat lib/001.rb
require_relative '../001/test.rb'
class RubyQuizTest
def parse(text)
text.lines.map do |line|
next if line.match(/^\s*$|#/)
line
.strip
.gsub(/"(([^"\\]|"")*(\\.([^"\\]|"")*)*)"|\'([^\'\\]*(\\.[^\'\\]*)*)\'/){
"\000#{
Regexp.last_match
.to_a[1..-1]
.compact[0]
.gsub(/,/, "\001")
.gsub(/\\"|""/, '"')
}\000"
}
.split(/\s*,\s*/, -1)
end.compact.map do |cells|
cells.map do |cell|
cell
.gsub(/\001/, ',')
.gsub(/\000/, '')
end
end
end
end
RubyQuizTest.new('fjc')



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