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replace the string from just before the last dot(.) [closed]

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I have a string like A/B/C/D.txt
So I want to replace the character just before the last . with the new one.
Like I would add E in last So the output should be A/B/C/E.txt
Can this is possible with only replace and concat Or Regex should help?

I'm sure the output is correct.
A/B/C/E.txt
var filename = 'A/B/C/D.txt';
var dotIndex = filename.lastIndexOf('.');
document.write(filename.substr(0, dotIndex-1) + 'E'+filename.substr(dotIndex, filename.length-dotIndex));

var parts = 'A/B/C/D.txt'.split('.');
if(parts.length > 1)
{
parts[parts.length-2] = parts[parts.length-2].replace(/.$/,"E");
let result = parts.join('.');
console.log(result);
}

Try this:
let name = "A/B/C/D.txt"
let res = name.substr(0, name.lastIndexOf(".")) + "E." + name.substr(name.lastIndexOf(".") + 1);
console.log(res);

Enter age javascript error [closed]

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Can anyone tell me what's wrong with this specific code and how can I fix it? Thanks in advance.
<script language=javascript type="text/javascript">
toDays(21);
function toDays(years)
{
var time;
time = 365*years;
return time;
}
document.write("My age is " + time);
</script>

Document.write should be inside function or toDays(21) outside function
function toDays(years)
{
var time;
time = 365*years;
document.write("My age is " + time);
return time;
}
document.write("My age is " + toDays(21));
http://codepen.io/nagasai/pen/oLaRdw

The return value from the function was not stored in a variable.
Due to hoisting of the function in Javascript, the toDays is defined before its defination line.
Store the result from the function in a global variable time.
Use document.write to print the results.
var time = toDays(21);
function toDays(years)
{
var time;
time = 365*years;
return time;
}
document.write("My age is " + time);

error with javascript: missing ; before statement [closed]

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I'm getting an error with my javascript: "missing ; before statement".
I'm trying to read in a date, add 6 months onto the date if it meets a certain criteria ( joiner type in this case) and if not just return that date.
I can't see whats wrong here, it must be something small, any ideas??
Thanks!
function checkenddate(Par) {
var array = Par.split("!!");
var usermskey = array[0];
var date = array[1];
var joinertype = array[2];
saprep = UserFunc.uGetConstant("glb.REPOSITORY_ECC");
attr1 = "Z_VALIDTO" + saprep;
uWarning("Attribute: " + attr1);
if (date == null && joinertype.equals("Contractor"))
{
SimpleDateFormat sdf = new SimpleDateFormat("yyyy-MM-dd");
Calender c = Calender.getInstance();
c.setTime(sdf.parse(date));
c.add(Calender.MONTH, 6);
enddate = sdf.format(c.getTime());
uWarning("End Date:" + enddate);
OutString = uIS_SetValue(usermskey, 0, attr1, enddate);
return enddate;
} else {
OutString = uIS_SetValue(usermskey, 0, attr1, date);
return date;
}
}

Thats not valid javascript. You can't have typed variables such as SimpleDateFormat sdf = new blah(). Change your types to var and it will work as expected.
var sdf = new SimpleDateFormat("yyyy-MM-dd");
var c = Calender.getInstance();

This is not how you declare a JS variable:
SimpleDateFormat sdf = new SimpleDateFormat("yyyy-MM-dd");
You need this instead:
var sdf = new SimpleDateFormat("yyyy-MM-dd");
I would recommend using one of the linting tools online (e.g. JSHint or JSLint) to help track down these issues - very handy.

Get values of Input[type=(type)] from specific class with jQuery [closed]

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Closed 8 years ago.
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I have this code that does not work:
kw _class = _keyword1;
var text = $("'input." + kw_class + "[type=text]'").val();
var val = $("'input." + kw_class + "[type=hidden]'").val();
Firefox console comes out with this:
`Syntax error, unrecognized expression: 'input._keyword1[type=text]'
I have tried at least three combos of this that are not working that I found from other questions.

Yes because you have ' ' inside of the selector. It should be:
var text = $("input." + kw_class + "[type=text]").val();
var val = $("input." + kw_class + "[type=hidden]").val();

you have extra '' in the selector
var text = $('input.' + kw_class + '[type=text]').val();
var val = $('input.' + kw_class + '[type=hidden]').val();

How to convert string to date javascript?

I have this as my date: 1212009 so this should be like 12/1/2009 but I am stuck this as an id field and id fields cannot have dashes in there names.
Now can java-script take this number and re add the slashed in for me or how would I go about doing this?
Thanks

You should have two-digit numbers for the month and day, since "1212009" is ambiguous, could be interpreted as "1/21/2009" or "12/1/2009".
If you add the leading zeros, you know that there will be always 8 digits, so you can do something like this:
var str = "12012009"
var result = str.replace(/(\d{2})(\d{2})(\d{4})/, "$1/$2/$3");
// 12/01/2009
Or
var result = str.match(/(\d{2})(\d{2})(\d{4})/).slice(1).join('/');
// 12/01/2009

Well without leading zeros, it's not possible to make a reliable conversion. It's impossible to know if 1232009 is 1/23/2009 or 12/3/2009 without leading zeros. Also, your example number could be interpreted as 1/21/2009 too.

All you need to do is pass the string into the new date constructor.
Here is a good javascript resource for you to look at.
http://www.javascriptkit.com/jsref/date.shtml

Assuming that you add the leading zeroes to remove the ambiguity, you can format the date like so:
dateString = String(id).match(/(\d{2})(\d{2})(\d{4})/).slice(1).join('/')

Maybe this will help you to get rid of the six or seven numbers long date (most important part is the first part):
var sDate = "1212009";
if(sDate.length == 7){
sDate = sDate.substr(0,2) + "0" + sDate.substr(2);
}
else if(sDate.length == 6){
sDate = "0" + sDate.substr(0,1) + "0" + sDate.substr(1);
}
// This part can be done with Regular Expressions, as shown in other comments
var month = parseInt(sDate.substring(0,2));
var day = parseInt(sDate.substring(2,4));
var year = parseInt(sDate.substring(4));
alert(day + "/" + month + "/" year);
// Will alert 12/1/2009
However,
1232009 will always be 01/23/2009, not 12/03/2009
112009 changes to 1/1/2009
10102009 changes to 10/10/2009