如何在不知道在Javascript中是什么的情况下引用数组的索引？
如何在不知道在Javascript中是什么的情况下引用数组的索引？
提问于 2016-10-24 10:09:58
我正在做一个日历应用程序，我试着验证输入的日期是否在本学期，然后看看我们是否放假了。我有一个所有日期的索引，其中包含了各个节日的名称，但当我尝试使用indexOf时，代码崩溃了。这是html：
<form onsubmit="holiday()" method="post">
<fieldset>
Enter Date: <input type='date' id="dat"><p>
<input class="ubmit" type=submit >
</fieldset>
</form>
<p id="output"></p>这是js：
var dvalue = document.getElementById("dat").value;
function holiday(){
var txt ="boo";
dvalue=Date.parse(dvalue);
console.log(dvalue);
if (dvalue<1473033600000 || dvalue>1494979200000 || dvalue=="NaN"){
txt="This is not a valid date for this calendar app";
}
else function validate(dvalue){
var holidayz=new Array();
holidayz[0]=["Columbus Day",1473033600000];
holidayz[1]=["Fall Recess",1476057600000];
holidayz[2]=["Thanksgiving Recess",1479859200000];
holidayz[3]=["Thanksgiving Recess",1479945600000];
holidayz[4]=["Thanksgiving Recess",1480032000000];
holidayz[5]=["Thanksgiving Recess",1480118400000];
holidayz[6]=["President's Day",1487548800000];
holidayz[7]=["Spring Recess",1489363200000];
holidayz[8]=["Spring Recess",1489449600000];
holidayz[9]=["Spring Recess",1458000000000];
holidayz[10]=["Spring Recess",1489622400000];
holidayz[11]=["Spring Recess",1489708800000];
holidayz[12]=["Reading Day",1494288000000];
holidayz[13]=["Memorial Day",1496016000000];
holidayz[14]=["Independence Day",1499126400000];
if (holidayz.includes(dvalue)){
var mydate = new Date(dvalue);
console.log("<p>" + mydate + "<p>");
var day = mydate.getUTCDate();
var month = mydate.getMonth()+1;
var year = mydate.getFullYear();
console.log (month + "/" + day +"/" + year);
var holival= asList(holidayz).indexOf(dvalue);
console.log(holival)
}
}
console.log(txt)
document.getElementById("output").innerHTML = txt;
}Stack Overflow用户
发布于 2016-10-24 10:30:32
尝尝这个,
var dvalue = document.getElementById("dat").value;
function holiday(){
var txt ="boo";
dvalue=Date.parse(dvalue);
console.log(dvalue);
if (dvalue<1473033600000 || dvalue>1494979200000 || dvalue=="NaN"){
txt="This is not a valid date for this calendar app";
} else {
var holidayz=new Array();
holidayz[0]=["Columbus Day",1473033600000];
holidayz[1]=["Fall Recess",1476057600000];
holidayz[2]=["Thanksgiving Recess",1479859200000];
holidayz[3]=["Thanksgiving Recess",1479945600000];
holidayz[4]=["Thanksgiving Recess",1480032000000];
holidayz[5]=["Thanksgiving Recess",1480118400000];
holidayz[6]=["President's Day",1487548800000];
holidayz[7]=["Spring Recess",1489363200000];
holidayz[8]=["Spring Recess",1489449600000];
holidayz[9]=["Spring Recess",1458000000000];
holidayz[10]=["Spring Recess",1489622400000];
holidayz[11]=["Spring Recess",1489708800000];
holidayz[12]=["Reading Day",1494288000000];
holidayz[13]=["Memorial Day",1496016000000];
holidayz[14]=["Independence Day",1499126400000];
holidayz[15]=["Test Day",1476921600000];
for(var i=0; i<holidayz.length; i++){
if ((holidayz[i][1])==dvalue){
var mydate = new Date(dvalue);
console.log("<p>" + mydate + "<p>");
var day = mydate.getUTCDate();
var month = mydate.getMonth()+1;
var year = mydate.getFullYear();
console.log (month + "/" + day +"/" + year);
var holival= i; //asList(holidayz).indexOf(dvalue);
console.log(holival);
break;
}
}
}
console.log(txt);
}
页面原文内容由Stack Overflow提供。腾讯云小微IT领域专用引擎提供翻译支持
原文链接：
https://stackoverflow.com/questions/40209790
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