Serializing XML in JavaScript

Question

I am consuming XML in express server parsing it with express-xml-bodyparser, but the resulting object is basically unusable.

XML

<SubClass code="A07.0"/>
<SubClass code="A07.1"/>
<SubClass code="A07.2"/>
<SubClass code="A07.3"/>
<SubClass code="A07.8"/>
<SubClass code="A07.9"/>

is serialized as JSON

subclass:
[ { '$': { code: 'A07.0' } },
  { '$': { code: 'A07.1' } },
  { '$': { code: 'A07.2' } },
  { '$': { code: 'A07.3' } },
  { '$': { code: 'A07.8' } },
  { '$': { code: 'A07.9' } } ]

Is there way to pase it directly into

subclass: ['A07.0','A07.1','A07.2','A07.3','A07.8','A07.9']

or some easy way how to convert it into this array?

Array.from(parentNode.childNodes).filter(n => n.nodeType === 1).map(n => n.getAttribute('code')) — JLRishe
– JLRishe, Commented Jan 18, 2018 at 12:41
Under what logic would a serializer know to do what you're describing? What if the XML looked like this, what should it do then: <SubClass code="A07.0"/> <SubClass code="A07.1"/> <SubClass code="A07.2" subCode="5"/> <Field id="9" /> <SubClass code="A07.3"/> <SubClass code="A07.8"/> <SubClass code="A07.9"/> — JLRishe
– JLRishe, Commented Jan 18, 2018 at 12:46

YouneL · Accepted Answer · 2018-01-18 13:24:41Z

You can set mergeAttrs option to true in order to remove $ properties:

 xmlparser({ mergeAttrs: true, explicitArray: false})

Output:

SubClass: [
    { code: "A07.0" },
    { code: "A07.1" },
    { code: "A07.2" },
    { code: "A07.3" },
    { code: "A07.8" },
    { code: "A07.9" }
]

Or you can just use array.map() method:

var data = { subclass:
[ { '$': { code: 'A07.0' } },
  { '$': { code: 'A07.1' } },
  { '$': { code: 'A07.2' } },
  { '$': { code: 'A07.3' } },
  { '$': { code: 'A07.8' } },
  { '$': { code: 'A07.9' } } ] };
  
  
var result = data.subclass.map( (obj) => {
    return obj.$.code;
});

console.log(result);

Hiplobbe · Accepted Answer · 2018-01-18 12:40:31Z

0

If you want to convert json into an object then maybe something like...

var arr = Object.keys(json).map(function(x) { return obj[x] });

With jQuery

var arr = $.map(json, function(x) { return x});

answered Jan 18, 2018 at 12:40

Hiplobbe

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1 Comment

JLRishe Over a year ago

This wouldn't work on the "JSON" that OP posted, and I think OP is looking to skip intermediate JSON step.

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