shank() - array - duplicates Array.prototype.splice() except returns a new array instead of mutating in-place

Update shank.md

Update shank.md

Update shank.js

Update shank.test.js

Update tag_database

remove testlog

tag_database

@@ -247,6 +247,7 @@ sdbm:math,utility,intermediate
 serializeCookie:utility,string,intermediate
 setStyle:browser,beginner
 shallowClone:object,beginner
+shank:array,intermediate
 show:browser,css,beginner
 shuffle:array,random,intermediate
 similarity:array,math,beginner