Adds a handy matchPatterns method to case macros.

[trxcllnt]

No description provided.

[BrendanEich]

Would a standard flatMap for Arrays help? It would flatten to arbitrary depth.

Nit: some if( and while( no-space-before-left-paren sightings later in patch.

/be

[trxcllnt]

@BrendanEich getting flatMap on the Array prototype would be very helpful. This flatten function collapses an n-dimension Array into an Array of Arrays, which is trivial to compose via recursive flatMaps.

[disnet]

Looks good!