CDE

Task/Align-columns/D/align-columns.d

@@ -0,0 +1,23 @@
+import std.stdio, std.string, std.algorithm, std.range;
+
+void main() {
+    auto data =
+"Given$a$txt$file$of$many$lines,$where$fields$within$a$line$
+are$delineated$by$a$single$'dollar'$character,$write$a$program
+that$aligns$each$column$of$fields$by$ensuring$that$words$in$each$
+column$are$separated$by$at$least$one$space.
+Further,$allow$for$each$word$in$a$column$to$be$either$left$
+justified,$right$justified,$or$center$justified$within$its$column."
+    .splitLines.map!q{ a.chomp("$").split("$") };
+
+    int[int] maxWidths;
+    foreach (line; data)
+        foreach (i, word; line)
+            maxWidths[i] = max(maxWidths.get(i, 0), word.length);
+
+    foreach (just; [&leftJustify!string, &center!string,
+                    &rightJustify!string])
+        foreach (line; data)
+            writefln("%-(%s %)", iota(line.length)
+                     .map!(i => just(line[i], maxWidths[i], ' ')));
+}