Family Day update

Task/Empty-string/C-sharp/empty-string-2.cs

@@ -3,7 +3,7 @@ using System.Collections.Generic;
 
 static class Program
 {
-    // TL; DR:
+    // In short:
     public static void Foo()
     {
         string s;
@@ -16,21 +16,21 @@ static class Program
         // Check for empty string only (false if s is null):
         if (s != null && s.Length == 0) { }
 
-        // Check for null or empty (most idiomatic .NET way):
+        // Check for null or empty (more idiomatic in .NET):
         if (string.IsNullOrEmpty(s)) { }
     }
 
     public static void Main()
     {
         // Equality is somewhat convoluted in .NET.
-        // The means above are the author's recommendation for each case.
+        // The methods above are the author's recommendation for each case.
 
         // s is initialized to null. It is a variable of the System.String type that is a null reference and is not
         // the empty string.
         string s = null;
 
-        // Alias Console.WriteLine with a shorter name to make the demonstration code less verbose.
-        void P(bool x) => Console.WriteLine(x);
+        // Alias Console.WriteLine(bool) with a shorter name to make the demonstration code less verbose.
+        Action<bool> P = Console.WriteLine;
 
         // Assign the empty string literal to s.
         s = "";

Task/Empty-string/Cache-ObjectScript/empty-string.cos

@@ -0,0 +1,15 @@
+EMPTYSTR
+    ; Demonstrate how to assign an empty string to a variable.
+    set x = ""
+
+      ; Demonstrate how to check that a string is empty.
+      ; Length 0 is empty; equality/pattern check are 1=T, 0=F
+      write !,"Assigned x to null value.  Tests: "
+      write !,"String length: "_$length(x)_", Equals null: "_(x = "")_", Empty pattern: "_(x?."")    ; length 0 is empty
+
+      ; Demonstrate how to check that a string is not empty.  Same as above.
+      set x = " "    ;assign to a space - not null
+      write !!,"Assigned x to a single blank space.  Tests: "
+      write !,"String length: "_$length(x)_", Equals null: "_(x = "")_", Empty pattern: "_(x?."")
+
+      quit

Task/Empty-string/Go/empty-string-2.go

@@ -0,0 +1,23 @@
+package main
+
+import (
+	"fmt"
+)
+
+func test(s string) {
+	if len(s) == 0 {
+		fmt.Println("empty")
+	} else {
+		fmt.Println("not empty")
+	}
+}
+
+func main() {
+	// assign an empty string to a variable.
+	str1 := ""
+	str2 := " "
+	// check if a string is empty.
+	test(str1) // prt empty
+	// check that a string is not empty.
+	test(str2) // prt not empty
+}

Task/Empty-string/Python/empty-string.py

@@ -1,5 +1,5 @@
 s = ''
-if not s:
-    print('String s is empty.')
-if s:
-    print('String s is not empty.')
+if len(s) == 0:
+    print("String is empty")
+else:
+    print("String not empty")

Task/Empty-string/Robotic/empty-string.robotic

@@ -0,0 +1,8 @@
+set "$string" to ""
+if "$string.length" = 0 then "empty"
+* "Not an empty string."
+end
+
+: "empty"
+* "Empty string"
+end

Task/Empty-string/Visual-Basic-.NET/empty-string-1.visual

@@ -9,6 +9,6 @@ s = String.Empty
 If s IsNot Nothing AndAlso s.Length = 0 Then
 End If
 
-' Check for null or empty (most idiomatic .NET way):
+' Check for null or empty (more idiomatic in .NET):
 If String.IsNullOrEmpty(s) Then
 End If

Task/Empty-string/Visual-Basic-.NET/empty-string-2.visual

@@ -1,19 +1,18 @@
 Option Strict On
 
 Module Program
-
     Sub Main()
         ' Equality is somewhat convoluted in .NET, and VB doesn't help by adding legacy means of comparison.
-        ' The means above are the author's recommendation for each case.
-        ' Some methods also return true if the string is Nothing/null; this is noted in the description for those that
+        ' The methods above are the author's recommendation for each case.
+        ' Some also return true if the string is Nothing/null; this is noted in the description for those that
         ' do.
 
         ' s is initialized to Nothing. It is a variable of the System.String type that is a null reference and is not
         ' the empty string.
         Dim s As String = Nothing
 
-        ' Alias Console.WriteLine with a shorter name to make the demonstration code less verbose.
-        Dim P = Sub(x As Boolean) Console.WriteLine(x)
+        ' Alias Console.WriteLine(Boolean) with a shorter name to make the demonstration code less verbose.
+        Dim P As Action(Of Boolean) = AddressOf Console.WriteLine
 
         ' Assign the empty string literal to s.
         s = ""
@@ -111,7 +110,7 @@ Module Program
 
         Console.WriteLine()
 
-        ' Each of the means described above, except testing for a non-empty string.
+        ' Each of the methods described above, except testing for a non-empty string.
         P(s IsNot "")
         P(Not Object.ReferenceEquals(s, ""))
         P(s <> "")