Data commit

Task/Read-a-specific-line-from-a-file/D/read-a-specific-line-from-a-file-1.d

@@ -0,0 +1,6 @@
+void main() {
+    import std.stdio, std.file, std.string;
+    auto file_lines = readText("input.txt").splitLines();
+    //file_lines becomes an array of strings, each line is one element
+    writeln((file_lines.length > 6) ? file_lines[6] : "line not found");
+}

Task/Read-a-specific-line-from-a-file/D/read-a-specific-line-from-a-file-2.d

@@ -0,0 +1,22 @@
+import std.stdio;
+
+void main() {
+    int countLines;
+    char[] ln;
+    auto f = File("linenumber.d", "r");
+    foreach (char[] line; f.byLine()) {
+        countLines++;
+        if (countLines == 7) {
+            ln = line;
+            break;
+        }
+    }
+    switch(countLines) {
+        case 0 : writeln("the file has zero length");
+                break;
+        case 7 : writeln("line 7: ", (ln.length ? ln : "empty"));
+                break;
+        default :
+                writefln("the file only contains %d lines", countLines);
+    }
+}