Merge pull request #4067 from Abigail/abigail/week-112

Abigail/week 112

1 files changed, 35 insertions, 0 deletions

diff --git a/challenge-112/abigail/lua/ch-1.lua b/challenge-112/abigail/lua/ch-1.lua
new file mode 100644
index 0000000000..2d866dd9bf
--- /dev/null
+++ b/challenge-112/abigail/lua/ch-1.lua
@@ -0,0 +1,35 @@
+#!/opt/local/bin/lua
+
+--
+-- See ../README.md
+--
+
+--
+-- Run as: lua ch-1.lua < input-file
+--
+
+for line in io . lines () do
+    --
+    -- Split into parts
+    --
+    local parts = {}
+    for part in line : gmatch ("[^/]+") do
+        table . insert (parts, part)
+    end
+    --
+    -- Copy to new structure
+    --
+    local parts2 = {}
+    for index, part in ipairs (parts) do
+        if part == "." then    -- Current directory -> skip
+            goto continue
+        end
+        if part == ".." then   -- Parent direction -> pop from new structure
+            table . remove (parts2)
+            goto continue
+        end
+        table . insert (parts2, part)  -- Else, copy
+        ::continue::
+    end
+    print ("/" .. table . concat (parts2, "/"))  -- And print
+end