TypeError：无法从 行号 中的未定义中读取属性“分数”。

Question

在我的Java应用程序中的javascript下面执行代码时遇到零星的问题>

TypeError：无法从行号1的未定义中读取属性“ score”

{
    if (typeof contextVar.queryFreeTechs != 'undefined' || contextVar.queryFreeTechs != '') {
        var sortable = [];
        var high;
        for (var value in contextVar.queryFreeTechs) {
            var obj = { userId: contextVar.queryFreeTechs[value].userId, score: contextVar.queryFreeTechs[value].score }; sortable.push(obj)
        }
        sortable.sort(function (a, b) { return b.score - a.score });
        var newJsonData = {};
        high = sortable[0].score;
        sortable.forEach(function (element) {
            if (element.score === high) { newJsonData[element.userId] = 100 }
            else { newJsonData[element.userId] = Math.ceil((element.score) / high * 100) }
        }); contextVar.utilisationScoreData = newJsonData
    }
}

下面是我的Java代码
ScriptEngineManager factory = new ScriptEngineManager();
ScriptEngine engine = factory.getEngineByName("nashorn");
Object retObj = engine.eval(rule.getScript(), bindings);

完整的堆栈跟踪
javax.script.ScriptException: TypeError: Cannot read property "score" from undefined in <eval> at line number 1
    at jdk.nashorn.api.scripting.NashornScriptEngine.throwAsScriptException(NashornScriptEngine.java:470)
    at jdk.nashorn.api.scripting.NashornScriptEngine.evalImpl(NashornScriptEngine.java:454)
    at jdk.nashorn.api.scripting.NashornScriptEngine.evalImpl(NashornScriptEngine.java:406)
    at jdk.nashorn.api.scripting.NashornScriptEngine.evalImpl(NashornScriptEngine.java:402)
    at jdk.nashorn.api.scripting.NashornScriptEngine.eval(NashornScriptEngine.java:155)
    at javax.script.AbstractScriptEngine.eval(AbstractScriptEngine.java:233)
    at com.abc.rule.system.RunnableScript.executeScript(RunnableScript.java:162)

无法确定这是JavaScript还是我的应用程序出现了问题。任何帮助都会有所帮助。

我在从Java应用程序TypeError的javascript下面执行代码时遇到一个零星的问题：无法从行号1 {if（typeof ...

Answer 1