[BUG] $filter returns a string when only one match

[amcdnl]

Bug

When you use the $filter and it only finds one match, it will return a string rather than an array.

The documentation states that it should return an array: https://docs.jsonata.org/higher-order-functions#filter

Steps

Here is a screenshot of a jsonata excise that shows the issue:

If I invert the expression so that it would return more, it works as expected returning an array.

I'm not sure if this is expected or not, but if it returns nothing, it returns undefined.

[andrew-coleman]

Does this explain what you see? https://docs.jsonata.org/processing#sequences

Rather than paste a screenshot, please could you use the 'save and share' facility and paste in the link.

[mattbaileyuk]

As discussed in https://docs.jsonata.org/next/construction#array-constructors you can use [ ] to ensure the result is always an array

[jhorbulyk]

Related #462