Dynamic variable names
Dynamic variable names
You are encouraged to solve this task according to the task description, using any language you may know.
You are encouraged to solve this task according to the task description, using any language you may know.
Create a variable with a user defined name.
AutoHotkey
<lang AutoHotkey> InputBox, Dynamic, Variable Name %Dynamic% = hello ListVars MsgBox % %dynamic% ; says hello </lang>
Common Lisp
<lang lisp>
(defmacro set-string (string value) `(setf ,(read-from-string string) ,value)) (set-string "dynamicA" "hello")
(print dynamicA) </lang>
Perl
<lang perl>print "Enter a variable name: "; $varname = <STDIN>; # type in "foo" on standard input chomp($varname); $$varname = 42; # when you try to dereference a string, it will be
# treated as a "symbolic reference", where they # take the string as the name of the variable
print "$foo\n"; # prints "42"</lang>
Python
<lang python>>>> n = raw_input("Enter a variable name: ") Enter a variable name: X >>> exec n + " = 42" >>> X 42</lang>
<lang python>>>> n = input("Enter a variable name: ") Enter a variable name: X >>> exec(n + " = 42") >>> X 42</lang>
Tcl
<lang Tcl>puts "Enter a variable name:" gets stdin varname set $varname 0</lang>