{"name":"scriptNull","title":"scriptNull","type":"command","url":"https://community.bistudio.com/wiki/scriptNull","revid":363804,"updated":"2024-04-21T18:03:23Z","groups":["Variables"],"status":"ok","games":{"arma3":"1.32"},"since":"arma3 1.32","arma3_since":"1.32","description":"A non-existing or completed Script Handle. To compare non-existent scripts use isNull or isEqualTo:\n\n```sqf\nscriptNull == scriptNull;            // ERROR! == cannot be used with script object\nisNull scriptNull;                    // true\nscriptNull isEqualTo scriptNull;    // true\n```","syntaxes":[{"syntax":"scriptNull","params":[],"returns":{"type":"Script Handle","type_expr":"Script Handle","description":"NULL script"},"form":"nullary"}],"examples":[{"text":"Wait until previous script is finished before starting a new one:\n\n```sqf\n0 spawn\n{\n    _script = scriptNull;\n    for \"_i\" from 1 to 10 do\n    {\n        waitUntil { isNull _script };\n        _script = _i spawn\n        {\n            hint format [\"script %1 started\", _this];\n            sleep 1;\n            hint format [\"script %1 finished\", _this];\n            sleep 0.2;\n        };\n    };\n};\n```","code":["0 spawn\n{\n\t_script = scriptNull;\n\tfor \"_i\" from 1 to 10 do\n\t{\n\t\twaitUntil { isNull _script };\n\t\t_script = _i spawn\n\t\t{\n\t\t\thint format [\"script %1 started\", _this];\n\t\t\tsleep 1;\n\t\t\thint format [\"script %1 finished\", _this];\n\t\t\tsleep 0.2;\n\t\t};\n\t};\n};"]},{"text":"```sqf\nif (scriptDone (_obj getVariable [\"TAG_objScript\", scriptNull])) then\n{\n    _scriptHandle = _obj spawn { waitUntil { damage _this > 0.9 }; hint \"Critical Damage!\"; };\n    _obj setVariable [\"TAG_objScript\", _scriptHandle];\n};\n```","code":["if (scriptDone (_obj getVariable [\"TAG_objScript\", scriptNull])) then\n{\n\t_scriptHandle = _obj spawn { waitUntil { damage _this > 0.9 }; hint \"Critical Damage!\"; };\n\t_obj setVariable [\"TAG_objScript\", _scriptHandle];\n};"]},{"code":["str scriptNull; // <NULL-script>"]}],"see_also":["controlNull","displayNull","grpNull","locationNull","objNull","taskNull","teamMemberNull","configNull","typeName","isNull","scriptDone","spawn","execVM"]}