Question

I`m trying to get the attribute value of a xml by comparing it to another xml,as follows:

xmlData1 variable has xml like—>

<Root>
  <RNA A="100" x="table1" y="car11"/>
  <RNA A="101" x="table2" y="car12"/>
  <RNA A="102" x="table3" y="car13"/>
  <RNA A="103" x="table4" y="car14"/>
  <RNA A="104" x="table5" y="car15"/>
  <RNA A="105" x="table6" y="car16"/>
  <RNA A="106" x="table7" y="car17"/>
  <RNA A="107" x="table8" y="car18"/>
  <RNA A="108" x="table9" y="car19"/>
</Root>

xmlData2 variable has xml like —>

<Ina>
  <RNA B="100" x="table1" y="car11"/>
  <RNA B="101" x="table2" y="car12"/>
  <RNA B="102" x="table3" y="car13"/>
</Ina>

Here i `ve to compare like

if(xmlData1.getAttribute(x)==xmlData2.getAttribute(x) then
//code goes

How to achive this???please help

Answer 1

It’s reasonable simple. First off, you parse the xml. I’ve put together a X-browser function that fits your needs rather well, actually. You can find it here
Uncomment this line:

keep.push(parsed);//last element of array is the full DOM

Just call it like so:

var data1 = parseXML(xml1,'RNA','x');//xml1 is the first xml string
var data2 = parseXML(xml2,'RNA','x');//xml2 === second xml string
var xml1Parsed = data1.splice(-1);//assign document to variable
var xml2Parsed = data2.splice(-1);
//get the nodes of intrest
var RNA1 = xml1Parsed.getElementsByTagName('RNA');
var RNA2 = xml2Parsed.getElementsByTagName('RNA');

both data1 and data2 are now arrays, just iterate over them:

for (var i=0;i<data1.length;i++)
{
    if (data1[i] === data2[i])//attribute x is the same
    {//check whatever you need
        if (RNA1[i].getAttribute('y') === RNA2[i].getAttribute('y'))
        {
            console.log('node ' + i + ' is alike');//do stuff
        }
    }
}

---

Just for completeness and clarity, this is the function as used in this example:

var parseXML = (function(w,undefined)
{
    'use strict';
    var parser,i,ie,parsed;
    ie = false;
    switch (true)
    {
        case w.DOMParser !== undefined:
            parser = new w.DOMParser();
        break;
        case new w.ActiveXObject("Microsoft.XMLDOM") !== undefined:
            parser = new w.ActiveXObject("Microsoft.XMLDOM");
            parser.async = false;
            ie = true;
        break;
        default :
            throw new Error('No parser found');
    }
    return function(xmlString,getTags,getAttr)
    {
        var tags,keep = [];
        if (ie === true)
        {
            parser.loadXML(xmlString);
            parsed = parser;
        }
        else
        {
            parsed = parser.parseFromString(xmlString,'text/xml');
        }
        tags = parsed.getElementsByTagName(getTags);
        for(i=0;i<tags.length;i++)
        {
            if (!getAttr || getAttr === 'textContent')
            {
                keep.push(tags[i].textContent);
                continue;
            }
            if (getAttr && tags[i].getAttribute(getAttr))
            {
                keep.push(tags[i].getAttribute(getAttr));
            }
        }
        keep.push(parsed);//last element of array is the full DOM
        return keep;
    }
})(this);//assuming global declaration, if not: replace with window