Community preference so far? taylanbayirli@xxxxxx (26 Sep 2015 17:29 UTC)
Re: Community preference so far? Alex Shinn (29 Sep 2015 02:43 UTC)
Re: Community preference so far? taylanbayirli@xxxxxx (29 Sep 2015 09:17 UTC)
Re: Community preference so far? taylanbayirli@xxxxxx (29 Sep 2015 11:00 UTC)
Re: Community preference so far? Alex Shinn (30 Sep 2015 03:16 UTC)
Re: Community preference so far? taylanbayirli@xxxxxx (30 Sep 2015 09:37 UTC)
Re: Community preference so far? Alex Shinn (30 Sep 2015 14:02 UTC)
Re: Community preference so far? taylanbayirli@xxxxxx (30 Sep 2015 20:44 UTC)
Re: Community preference so far? taylanbayirli@xxxxxx (01 Oct 2015 08:36 UTC)
Re: Community preference so far? taylanbayirli@xxxxxx (29 Sep 2015 11:36 UTC)
Re: Community preference so far? taylanbayirli@xxxxxx (01 Oct 2015 12:53 UTC)
Re: Community preference so far? Alex Shinn (30 Sep 2015 03:32 UTC)
Re: Community preference so far? taylanbayirli@xxxxxx (30 Sep 2015 08:56 UTC)
Re: Community preference so far? Alex Shinn (30 Sep 2015 09:38 UTC)
Re: Community preference so far? taylanbayirli@xxxxxx (30 Sep 2015 09:46 UTC)
Re: Community preference so far? taylanbayirli@xxxxxx (30 Sep 2015 10:03 UTC)
Re: Community preference so far? Evan Hanson (30 Sep 2015 11:54 UTC)
Re: Community preference so far? taylanbayirli@xxxxxx (30 Sep 2015 22:34 UTC)
Re: Community preference so far? Per Bothner (29 Sep 2015 11:14 UTC)
Re: Community preference so far? John Cowan (29 Sep 2015 12:07 UTC)
Re: Community preference so far? Per Bothner (29 Sep 2015 12:47 UTC)
Re: Community preference so far? Alex Shinn (30 Sep 2015 09:15 UTC)

Re: Community preference so far? taylanbayirli@xxxxxx 30 Sep 2015 10:03 UTC

xxxxxx@gmail.com (Taylan Ulrich "Bayırlı/Kammer") writes:

> Add1 and sub1 are similarly trivial definitions, but if you say they're
> so common, then I have no problem adding them under misc. procedures.
> Will do in a moment.

I now defined:

=====
- `(hashtable-inc! hashtable key)` (procedure)
- `(hashtable-inc! hashtable key x)`

Effectively equivalent to:

    (hashtable-update! hashtable key (lambda (x) (+ x k)) 0)

where x is 1 when not provided.

- `(hashtable-dec! hashtable key)` (procedure)
- `(hashtable-dec! hashtable key x)`

Effectively equivalent to:

    (hashtable-update! hashtable key (lambda (x) (- x k)) #f)

where x is 1 when not provided.
=====

Are these OK?  In particular, is it OK that dec! errors when no
association exists, and inc! makes it start from 0 automatically?

Taylan