Just another update

Task/Copy-a-string/00DESCRIPTION

@@ -1 +1,4 @@
-This task is about copying a string. Where it is relevant, distinguish between copying the contents of a string versus making an additional reference to an existing string.
+{{omit from|bc}}
+This task is about copying a string.
+Where it is relevant, distinguish between copying the contents of a string
+versus making an additional reference to an existing string.

Task/Copy-a-string/00META.yaml

@@ -1,4 +1,5 @@
 ---
 category:
 - String manipulation
+- Simple
 note: Basic language learning

Task/Copy-a-string/Babel/copy-a-string.pb

@@ -0,0 +1,4 @@
+"Hello, world\n" dup cp
+str2ar dup 'Y' str2ar 0 paste ar2str
+<<
+<<

Task/Copy-a-string/REXX/copy-a-string.rexx

@@ -1,3 +1,2 @@
 src = "this is a string"
-<br><br>Note that all REXX values (variables) are stored as character strings.
 dst = src

Task/Copy-a-string/Ruby/copy-a-string-1.rb

@@ -0,0 +1,9 @@
+original = "hello"
+reference = original          # copies reference
+copy1 = original.dup          # instance of original.class
+copy2 = String.new(original)  # instance of String
+
+original << " world!"         # append
+p reference                   #=> "hello world!"
+p copy1                       #=> "hello"
+p copy2                       #=> "hello"

Task/Copy-a-string/Ruby/copy-a-string-2.rb

@@ -0,0 +1,7 @@
+original = "hello".freeze     # prevents further modifications
+copy1 = original.dup          # copies contents (without status)
+copy2 = original.clone        # copies contents (with status)
+p copy1.frozen?               #=> false
+p copy1 << " world!"          #=> "hello world!"
+p copy2.frozen?               #=> true
+p copy2 << " world!"          #=> can't modify frozen String (RuntimeError)

Task/Copy-a-string/Ruby/copy-a-string.rb

@@ -1,4 +0,0 @@
-original = "hello"
-reference = original
-copy1 = original.dup          # instance of original.class
-copy2 = String.new(original)  # instance of String

Task/Copy-a-string/Vim-Script/copy-a-string.vim

@@ -0,0 +1,6 @@
+let str1 = "original string"
+let str2 = str1
+let str1 = "new string"
+
+echo "String 1:" str1
+echo "String 2:" str2