consider an option to enforce correct type for default

[ORESoftware]

with this config

   {
        names: ['match'],
        type: 'arrayOfString',
        help: 'Use this to filter input to match the given JS regex',
        default: 'fixture'
    },

without a --match option at the command line

the match option will default to 'fixture'...

but the match option will be just a string 'fixture'

dashdash should probably either (1) coerce it into an array or (2) throw an error

in other words, the below works as expected, but the above does not

   {
        names: ['match'],
        type: 'arrayOfString',
        help: 'Use this to filter input to match the given JS regex',
        default: ['fixture']
    },

up to you, makes sense to leave it as is

[ORESoftware]

Seems like this is a bug?

[trentm]

If anything I think that should fail when the option spec is read, because the given 'default' doesn't match the type. That would either need to be off by default or only in a new major dashdash version.