CDE

Task/Align-columns/C-sharp/align-columns.cs

@@ -0,0 +1,74 @@
+using System;
+class ColumnAlignerProgram
+{
+    delegate string Justification(string s, int width);
+
+    static string[] AlignColumns(string[] lines, Justification justification)
+    {
+        const char Separator = '$';
+        // build input table and calculate columns count
+        string[][] table = new string[lines.Length][];
+        int columns = 0;
+        for (int i = 0; i < lines.Length; i++)
+        {
+            string[] row = lines[i].TrimEnd(Separator).Split(Separator);
+            if (columns < row.Length) columns = row.Length;
+            table[i] = row;
+        }
+        // create formatted table
+        string[][] formattedTable = new string[table.Length][];
+        for (int i = 0; i < formattedTable.Length; i++)
+        {
+            formattedTable[i] = new string[columns];
+        }
+        for (int j = 0; j < columns; j++)
+        {
+            // get max column width
+            int columnWidth = 0;
+            for (int i = 0; i < table.Length; i++)
+            {
+                if (j < table[i].Length && columnWidth < table[i][j].Length)
+                    columnWidth = table[i][j].Length;
+            }
+            // justify column cells
+            for (int i = 0; i < formattedTable.Length; i++)
+            {
+                if (j < table[i].Length)
+                    formattedTable[i][j] = justification(table[i][j], columnWidth);
+                else
+                    formattedTable[i][j] = new String(' ', columnWidth);
+            }
+        }
+        // create result
+        string[] result = new string[formattedTable.Length];
+        for (int i = 0; i < result.Length; i++)
+        {
+            result[i] = String.Join(" ", formattedTable[i]);
+        }
+        return result;
+    }
+
+    static string JustifyLeft(string s, int width) { return s.PadRight(width); }
+    static string JustifyRight(string s, int width) { return s.PadLeft(width); }
+    static string JustifyCenter(string s, int width)
+    {
+        return s.PadLeft((width + s.Length) / 2).PadRight(width);
+    }
+
+    static void Main()
+    {
+        string[] input = {
+            "Given$a$text$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.",
+        };
+
+        foreach (string line in AlignColumns(input, JustifyCenter))
+        {
+            Console.WriteLine(line);
+        }
+    }
+}