Reference JSON object field using .map() where field name contains spaces

Question

I'm using .map() to copy object fields from one JSON List to another, my issue is that the starting list I need to move the values from has spaces in the field names.

For fields with no spaces the following is working:

$scope.dataList = results.data.map(el => ({
     IdApplication: el.ApplicationReference,
     AccNo: el.AccountNumber
}))

The starting JSON however is taken directly from a CSV the user selects, and sadly the client won't change how they name their columns. So I need to map a JSON field called 'Application Reference'.

I've tried enclosing the field name in '' but this gives an identifier expected error on the first opening ' .

Bracket notation also doesn't work:

$scope.dataList = results.data.map(el => ({
    IdApplication: el.['Application Reference'],
    AccNo: el.AccountNumber
}))

This also gives an error of identifier expected on the opening [.

Protozoid · Accepted Answer · 2018-05-31 14:49:45Z

2

You said bracket notation doesn't work but your example doesn't show usage of bracket notation.

The correct usage would be:

$scope.dataList = results.data.map(el => ({
    IdApplication: el['Application Reference'],
    AccNo: el['Account Number']
}))

P.S. It's considered good practice to use camelCase for JSON properties https://google.github.io/styleguide/jsoncstyleguide.xml#Property_Name_Format

answered May 31, 2018 at 14:49

Protozoid

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1 Comment

Vereonix Over a year ago

I forgot to update the second section of code, i've updated it now, and can see that I was doing it wrong, I was leaving the period in after "el" then doing the bracket notation. e.g. el.['Application Reference']

David Cros Piezzoli · Accepted Answer · 2018-05-31 14:48:44Z

1

You can use this code

$scope.dataList = results.data.map(el => {
    IdApplication: el['Application Reference'],
    AccNo: el['Account Number']
})

answered May 31, 2018 at 14:48

David Cros Piezzoli

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