Be concise.
Be useful.
All contributions dictatorially edited by webmasters to match personal tastes.
Please do not paste any copyright violating resource.
Please try to avoid dependencies to third-party libraries and frameworks.
int x = 42; void printIfDefined(alias name)() { import std.stdio: writeln; static if( __traits(compiles, writeln(mixin(name)))) writeln(mixin(name)); } void main(string[] args) { printIfDefined!"x"; printIfDefined!"Foo.bar"; }
implicit none print *,x
if (typeof x !== 'undefined') { console.log(x); }
try { console.log(x); } catch (e) { if (!e instanceof ReferenceError) { throw e; } }
if x then print(x) end
$x = 'foo'; if (isset($x)) { echo $x; }
{$if DECLARED(x)} writeln(x); {$endif}
if 'x' in locals(): print x
puts x if defined?(x)