On Sun, Aug 28, 2016 at 11:58 PM, Steven Hardy <sha...@redhat.com> wrote: > Hi all, > > I have a need to merge a list of maps of lists: > > heat_template_version: 2016-10-14 > > outputs: > debug: > value: > yaql: > # dict(vms=>dict($.vms.select([$.name, $]))) > expression: dict($.data.l.select([$.keys().toList()[0], > $.values().toList()[0]])) > data: > l: > - a: [123] > - b: [123] > - a: [456] > > > > I want to end up with debug as: > > a: [123, 456] > b: [123] > > Perhaps we need a map_deep_merge function, but can this be done with yaql? > > I suspect it can, but can't currently figure out how the assignment to the > intermediate "a" value is supposed to work, any ideas on the cleanest > approach appreciated!
I believe you don't need the intermediate value, and can rely on what you'd do in Python with setdefault: dict($.groupBy($.keys().toList()[0], $.values().toList()[0][0])) ought to work, I believe? -- Thomas __________________________________________________________________________ OpenStack Development Mailing List (not for usage questions) Unsubscribe: openstack-dev-requ...@lists.openstack.org?subject:unsubscribe http://lists.openstack.org/cgi-bin/mailman/listinfo/openstack-dev
