Merge pull request #11 from manwar/master

update to week 12

1 files changed, 24 insertions, 11 deletions

diff --git a/challenge-010/duncan-c-white/README b/challenge-010/duncan-c-white/README
index fb3a863c80..2384fb220f 100644
--- a/challenge-010/duncan-c-white/README
+++ b/challenge-010/duncan-c-white/README
@@ -1,14 +1,27 @@
-Challenge 1: "Create a script which takes a list of numbers from
-command line and print the same in the compact form. For example, if
-you pass 1,2,3,4,9,10,14,15,16 then it should print the compact form
-like 1-4,9,10,14-16.."
+Challenge 1: "Write a script to encode/decode Roman numerals. For example,
+given Roman numeral CCXLVI, it should return 246. Similarly, for decimal
+number 39, it should return XXXIX."
 
-Quite simple and dull problem. But ok, let's have a go.
+My notes: That's a nice problem, let's have a go.
 
-Challenge 2: "Create a script to calculate Ramanujan's constant with at
-least 32 digits of precision."
 
-Never heard of this constant, seems to be e^(pi*sqrt(163)), which is
-"very nearly an integer", I don't particularly care about abtruse mathematical
-formulae.  But ok, Perl's built in module biggrat will let you do this anyway,
-specifying accuracy 32; see ch-2.sh for the oneliner.
+Challenge 2: "Write a to find Jaro-Winkler distance between two strings."
+
+My notes:
+
+WTF is Jaro-Winkler, read wikipedia page, well Jaro-Winkler is a
+simple prefix adjustment to the Jaro distance, but the wikipedia page
+explaining Jaro distances is not very clear - it describes it in terms
+of matched characters and transposed characters, but it's description
+of matching within a range, and of how to count transposed characters
+is almost completely unclear.  I couldn't write code based on such a
+poor description!
+
+But googling further, Rosetta Stone had various implementations in
+various languages (including C and Perl), which clarifies the terribly
+unclear wikipedia entry.  Ok, I basically understand it now.  Transposed
+characters are matching characters that are diferent, eg TH vs HT
+
+So I'll have a go anyway, although I ran out of time to do it in the
+weekly challenge (and I screwed up the git side of things, so couldn't
+submit it late either).