我正在尝试访问数组中对象的属性之一。这是我的设置方法。
var 2002 = [{"st_as_str":"01006000102","parm_desc":"ALKALINITY, TOTAL","sub":"ALKALINITY","is_fil":false,"is_reac":false,"date":"2002-09-02","time":"16:45","field_num":70237,"lims_r":"","result":137.0,"val_qual":"","ana_meth":"E3218A","unit":"MILLIGRAM PER LITER"},
{"st_as_str":"01006000102","parm_desc":"ALKALINITY, TOTAL","sub":"ALKALINITY","is_fil":false,"is_reac":false,"date":"2002-09-08","time":"14:30","field_num":70240,"lims_r":"","result":142.0,"val_qual":"","ana_meth":"E3218A","unit":"MILLIGRAM PER LITER"}]
//These two lines are actually one. I broke them up to make this somewhat readable. Also, this is a portion of the file.
我一直在尝试访问这样的属性:
alert(2002[0].parm_desc);
如:alert(array[object at this index].thisproperty)
尽管它似乎不起作用。这是我的更多代码。
<script>
function getScript(url, callback) {
var script = document.createElement('script');
script.type = 'text/javascript';
script.src = url;
script.onreadystatechange = callback;
script.onload = callback;
document.getElementsByTagName('head')[0].appendChild(script);
}
//this works and I am getting the alerts
getScript('./analysis_valqualifi.js', function(){
alert("Analysis Method: " + analysis_method[0][1]);
alert("Lims_ValQualifi: " + lims_valqualifi[0][1]);
});
//this isn't working
getScript('./2002_results.js', function(){
alert(2002[0].parm_desc);
});
</script>
在发出前两个警报之后,我的其他脚本运行之前有15-20秒的延迟,因此,我可以确定JavaScript
正在读取文件及其语法错误。
您的变量2002
是非法的。如果您直接在Chrome开发者工具控制台中尝试第一行,它将立即报告以下内容:
var 2002 = [{"st_as_str":"01006000102","parm_desc":"ALKALINITY, TOTAL","sub":"ALKALINITY","is_fil":false,"is_reac":false,"date":"2002-09-02","time":"16:45","field_num":70237,"lims_r":"","result":137.0,"val_qual":"","ana_meth":"E3218A","unit":"MILLIGRAM PER LITER"}, ...
SyntaxError: Unexpected number
例如,如果仅使用字符作为前缀,则:
var s2002 = [{"st_as_str":"01006000102","parm_desc":"ALKALINITY, TOTAL","sub":"ALKALINITY","is_fil":false,"is_reac":false,"date":"2002-09-02","time":"16:45","field_num":70237,"lims_r":"","result":137.0,"val_qual":"","ana_meth":"E3218A","unit":"MILLIGRAM PER LITER"}, {"st_as_str":"01006000102","parm_desc":"ALKALINITY, TOTAL","sub":"ALKALINITY","is_fil":false,"is_reac":false,"date":"2002-09-08","time":"14:30","field_num":70240,"lims_r":"","result":142.0,"val_qual":"","ana_meth":"E3218A","unit":"MILLIGRAM PER LITER"}]
这很好。请参阅此帖子,以获取有关变量名规则的完整摘要。
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