FEATURE: Allow access to properties that are deeper down the object tree

[dtchau]

The current implementation only allows the user to access a row's first-level properties.

For example, if you have some underlying objects that look like this

let students = [
  {name: 'ABC', address: {number: 123, street: ABC Street'}, phones: [{type: 'cell', number: 123456789}]},
  {name: 'XYZ', address: {number: 456, street: 'XYZ Street'}, phones: [{type: 'cell', number: 123456789}]}
];

and you want to display the street on the table, you will first have to map them to something like this

let rows = students.map(student => {
  return {name: student.name, addressNumber: student.address.number, addressStreet: student.address.street};
})

before you can assign this to ngTable's rows input. It's because rows[0]['address.number'] will return undefined.

I propose we allow users to access properties that are deeper than the first-level properties.

For example, to display the street name, one can simply set the column.name to 'address.street'. This notation will work for array too. For example, to show the first phone number, just set column.name to 'phones.0.number'.

[valorkin]

Looks great!