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4rpl:commands:refexists
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⇐ Index
Variable Exists (Dynamic)
Syntax
-?!
Description
Takes a string from the stack and uses it as a variable name. If the variable exists (has been assigned),1 (true) is pushed to the stack, otherwise 0 (false).
Examples
"Santa isn't r-" ->secret if ("secret" -?!) "I know a secret" Trace else "I know no secrets" Trace endif
4rpl/commands/refexists.1610666617.txt.gz · Last modified: 2021/01/14 18:23 by Sanian
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