Just another update

Task/Binary-strings/D/binary-strings.d

@@ -1,45 +1,45 @@
-import std.array: empty;
-import std.string: replace;
+void main() /*@safe*/ {
+    import std.array: empty, replace;
+    import std.string: representation, assumeUTF;
 
-void main() {
     // String creation (destruction is usually handled by
-    // the garbage collector)
+    // the garbage collector).
     ubyte[] str1;
 
-    // String assignments
-    str1 = cast(ubyte[])"blah";
-    // hex string, same as "\x00\xFB\xCD\x32\xFD\x0A"
-    // whitespace and newlines are ignored
+    // String assignments.
+    str1 = "blah".dup.representation;
+    // Hex string, same as "\x00\xFB\xCD\x32\xFD\x0A"
+    // whitespace and newlines are ignored.
     str1 = cast(ubyte[])x"00 FBCD 32FD 0A";
 
-    // String comparison
+    // String comparison.
     ubyte[] str2;
-    if (str1 == str2) {} // strings equal
+    if (str1 == str2) {} // Strings equal.
 
-    // String cloning and copying
-    str2 = str1.dup; // copy entire string or array
+    // String cloning and copying.
+    str2 = str1.dup; // Copy entire string or array.
 
     // Check if a string is empty
-    if (str1.empty) {} // string empty
-    if (str1.length) {} // string not empty
-    if (!str1.length) {} // string empty
+    if (str1.empty) {} // String empty.
+    if (str1.length) {} // String not empty.
+    if (!str1.length) {} // String empty.
 
-    // Append a ubyte to a string
+    // Append a ubyte to a string.
     str1 ~= x"0A";
     str1 ~= 'a';
 
-    // Extract a substring from a string
-    str1 = cast(ubyte[])"blork";
-    // this takes off the first and last bytes and
-    // assigns them to the new ubyte string
-    // This is just a light slice, no string data copied
-    ubyte[] substr = str1[1 .. $-1];
+    // Extract a substring from a string.
+    str1 = "blork".dup.representation;
+    // This takes off the first and last bytes and
+    // assigns them to the new ubyte string.
+    // This is just a light slice, no string data copied.
+    ubyte[] substr = str1[1 .. $ - 1];
 
     // Replace every occurrence of a ubyte (or a string)
-    // in a string with another string
-    str1 = cast(ubyte[])"blah";
-    replace(cast(char[])str1, "la", "al");
+    // in a string with another string.
+    str1 = "blah".dup.representation;
+    replace(str1.assumeUTF, "la", "al");
 
-    // Join strings
+    // Join two strings.
     ubyte[] str3 = str1 ~ str2;
 }