Matrix transposition: Difference between revisions

Content added Content deleted

Inline

@@ Line 655: / Line 655: @@
 <lang d>import std.stdio, std.algorithm, std.array, std.conv;
-auto transpose(T)(in T[][] m) pure nothrow {
+auto transpose(T)(immutable /*in*/ T[][] m) pure nothrow {
     auto r = new T[][](m[0].length, m.length);
     foreach (nr, row; m)
@@ Line 664: / Line 664: @@
 void main() {
-    enum M = [[10, 11, 12, 13],
+    immutable M = [[10, 11, 12, 13],
-              [14, 15, 16, 17],
+                   [14, 15, 16, 17],
-              [18, 19, 20, 21]];
+                   [18, 19, 20, 21]];
-    /*immutable*/ const T = transpose(M);
+    immutable T = transpose(M);
-    writeln("[", array(map!text(T)).join("\n "), "]");
+    writeln("[", join(map!text(T), "\n "), "]");
 }</lang>
 Output:
@@ Line 678: / Line 678: @@
 <lang d>import std.stdio, std.algorithm, std.conv, std.range;
-auto transpose(T)(in T[][] m) /*pure*/ {
+auto transpose(T)(in T[][] m) /*pure nothrow*/ {
-    return map!((i){ return transversal(m,i); })(iota(m[0].length));
+    return map!(i => transversal(m, i))(iota(m[0].length));
 }
@@ Line 687: / Line 687: @@
               [18, 19, 20, 21]];
     /*immutable*/ auto T = transpose(M);
-    writeln("[", array(map!text(T)).join("\n "), "]");
+    writeln("[", join(map!text(T), "\n "), "]");
 }</lang>