Today I learned: How to access an array item in a Handlebars template

To access an item of an array outside of a each block helper, for instance, may not be as a straightforward guess for JavaScript developers, as the notation is a little bit odd.

Taken the context data of:

{
  supportFolks: [
    {
      fullname: 'John Doe',
    },
    {
      fullname: 'Clark Kent'
    }
  ],
  fullnames: [
    'John Doe',
    'Clark Kent'
  ]
}

You can access the supportFolks array items individually as below:

Monday colleague on support is {{supportFolks.[0].fullname}}
Tuesday colleague on support is {{supportFolks.[1].fullname}}
...

what is equivalent to:

Monday colleague on support is {{supportFolks.0.fullname}}
Tuesday colleague on support is {{supportFolks.1.fullname}}
...

Note: Beware though with the ladder. Indeed, if the entry is a non-object value, you cannot just call fullnames.0 and expect it to work. You would have to go with fullnames.[0].
For that reason I would not recommend using the non-square-bracket expression as this may lead to confusions down the line.