September Morn Update

Task/Inverted-index/Julia/inverted-index.julia

@@ -0,0 +1,36 @@
+function makedoubleindex(files)
+    idx = Dict{String, Dict}()
+    for file in files
+        str = lowercase(read(file, String))
+        words = split(str, r"\s+")
+        for word in words
+            if !haskey(idx, word)
+                idx[word] = Dict{String, Int}()
+            elseif !haskey(idx[word], file)
+                (idx[word])[file] = 1
+            else
+                (idx[word])[file] += 1
+            end
+        end
+    end
+    idx
+end
+
+function wordsearch(dict, words::Vector{String})
+    for word in words
+        if haskey(dict, word)
+            for (f, n) in dict[word]
+                println("File $f contains $n instances of <$word>.")
+            end
+        else
+            println("No instances of \"$word\" were found.")
+        end
+    end
+end
+wordsearch(dict, word::String) = wordsearch(dict, [word])
+
+
+const filenames = ["file1.txt", "file2.txt", "file3.txt"]
+const didx = makedoubleindex(filenames)
+const searchterms = ["forehead", "of", "hand", "a", "foot"]
+wordsearch(didx, searchterms)