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How to check existance of the element value in Javascript

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  How to check existance of the element value in Javascript vinodtiwari10@gmail.com - 2016-10-04 11:23 -0700
    Re: How to check existance of the element value in Javascript "Evertjan." <exxjxw.hannivoort@inter.nl.net> - 2016-10-04 20:58 +0200

#31511 — How to check existance of the element value in Javascript

I have XML stored in the variable 'ad' and 'addd':
Variable ad:

    <?xml version="1.0" encoding="UTF-8"?>
    <name>
    <data>
    <Id>003</Id>
     </data>
    <data>
    <Id>006</Id>
    </data>
     ....
    </name>

And Variable addd:

    <?xml version="1.0" encoding="UTF-8"?>
    <name>
    <data>
    <Id>009</Id>
    </data>
    <data>
    <Id>005</Id>
    </data>
    ...
    </name>

I have written a `ttt` function:

    function ttt(ad,addd) {
    var match = ad.match(/<Id\/>/);
    var matcht = addd.match(/<Id\/>/);
    if ((! match || match.length == 0) && (! matcht || match.length == 0)){
        return "Below is the details of the Id of ad:\n\n" + ad.split("<Id>")[1].split("</Id>")[0]; + "\n\n And, Below is the details of the Id of addd:\n\n" +addd.split("<Id>")[1].split("</Id>")[0];
    }
}

I need `If` `Id` is not blank from ad variable then return alert as `error` with `Id` as below:

    <?xml version="1.0" encoding="UTF-8"?>
    <name>
    <data>
    <Id>003</Id>
    </data>
    <data>
    <Id>006</Id>
    </data>
    </name>

And, I need `If` `Id` is not blank from addd variable then return alert as `error` with `Id` as below:


    <?xml version="1.0" encoding="UTF-8"?>
    <name>
    <data>
    <Id>009</Id>
    </data>
    <data>
    <Id>005</Id>
    </data>
    </name>

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#31512

vinodtiwari10@gmail.com wrote on 04 Oct 2016 in comp.lang.javascript:

> I have XML stored in the variable 'ad' and 'addd':

You can only store a STRING containing text with xml-source in a variable


[...]

> 
> I have written a `ttt` function:

>     function ttt(ad,addd) {
>     var match = ad.match(/<Id\/>/);
>     var matcht = addd.match(/<Id\/>/);

If you want to test something in a string, use test() not match(),
and preferable don't use function words as variable names.

var adTest = /<Id\/>/.test(ad);
var adddTest = /<Id\/>/.test(addd);

>     if ((! match || match.length == 0) && 
>       (! matcht || match.length == 0 )
>     

if (!adTest && !adddTest) 
     alert('both tests are false');

Is that what you expected?

[..]
 
> I need `If` `Id` is not blank from ad variable then return alert as
> `error` with `Id` as below: 

"is not blank from ad variable" 

I do not understand that senstense, could you refrase?

=================

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-- 
Evertjan.
The Netherlands.
(Please change the x'es to dots in my emailaddress)

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