Online Ventolin Pharmacy - FDA Approved Pharmacy http://noehr.org/2009/08/27/bitwise-permissions-in-python-and-django/ Pythonista, RESTafarian, Binary Poet & Proud Bucketeer Thu, 03 Dec 2009 23:13:18 -0800 http://wordpress.org/?v=2.9.2 hourly 1 Online Ventolin Pharmacy - FDA Approved Pharmacy http://noehr.org/2009/08/27/bitwise-permissions-in-python-and-django/comment-page-1/#comment-2958 Rob Searles » Understanding Bitwise Operators (hopefully) Thu, 03 Dec 2009 23:13:18 +0000 http://noehr.org/?p=59#comment-2958 [...] in Jesper’s comment and original post was the use of the left shift operator: <<. After playing around with this it seems very [...] [...] in Jesper’s comment and original post was the use of the left shift operator: <<. After playing around with this it seems very [...]

]]> Online Ventolin Pharmacy - FDA Approved Pharmacy http://noehr.org/2009/08/27/bitwise-permissions-in-python-and-django/comment-page-1/#comment-2933 Rob Searles » Bitwise Operators used for Flagging Items, part 1 Wed, 02 Dec 2009 17:34:30 +0000 http://noehr.org/?p=59#comment-2933 [...] Hoehr has written about using bitwise operators for a flexible permissions scheme within Python  and Jonathan Snook has taken the bitwise concept further creating a great calendar [...] [...] Hoehr has written about using bitwise operators for a flexible permissions scheme within Python  and Jonathan Snook has taken the bitwise concept further creating a great calendar [...]

]]> Online Ventolin Pharmacy - FDA Approved Pharmacy http://noehr.org/2009/08/27/bitwise-permissions-in-python-and-django/comment-page-1/#comment-2662 jespern Fri, 13 Nov 2009 09:56:52 +0000 http://noehr.org/?p=59#comment-2662 The point is storing many permissions in a single field. You can make incredibly complex queries on that single field, by combining various "terms" with the binary OR operator, for example. We use it on Bitbucket to indicate various levels of permissions to objects, for example, you can be a reader, as well as an admin, which will *imply* writing, since admin has that flag set. The point is storing many permissions in a single field. You can make incredibly complex queries on that single field, by combining various “terms” with the binary OR operator, for example.

We use it on Bitbucket to indicate various levels of permissions to objects, for example, you can be a reader, as well as an admin, which will *imply* writing, since admin has that flag set.

]]> Online Ventolin Pharmacy - FDA Approved Pharmacy http://noehr.org/2009/08/27/bitwise-permissions-in-python-and-django/comment-page-1/#comment-2653 pulegium Thu, 12 Nov 2009 09:01:23 +0000 http://noehr.org/?p=59#comment-2653 very nice flashback... brings back all the memories os .asm and stuff... :) now back to business. although it's nice and geeky, why on earth would you use this these days unless you're developing s/w for embedded devices/etc? memory is super cheap and there's lots of it. obviously, one shouldn't abuse this, but I can't see how few extra Ks can make any difference on a machine that has few G's of memory. It's so much easier (and more readable IMHO) to just store this in a dictionary and access it as permissions['write'] = True or similar. What do you think? :) very nice flashback… brings back all the memories os .asm and stuff… :)

now back to business. although it’s nice and geeky, why on earth would you use this these days unless you’re developing s/w for embedded devices/etc? memory is super cheap and there’s lots of it. obviously, one shouldn’t abuse this, but I can’t see how few extra Ks can make any difference on a machine that has few G’s of memory. It’s so much easier (and more readable IMHO) to just store this in a dictionary and access it as permissions['write'] = True or similar.

What do you think? :)

]]> Online Ventolin Pharmacy - FDA Approved Pharmacy http://noehr.org/2009/08/27/bitwise-permissions-in-python-and-django/comment-page-1/#comment-2086 jespern Tue, 15 Sep 2009 16:51:27 +0000 http://noehr.org/?p=59#comment-2086 @Alex, We are using a wrapper around it, the bit-stuff is only on the backend layer, we never touch it. Writing such a layer is left as an exercise to the reader :-) @Alex,

We are using a wrapper around it, the bit-stuff is only on the backend layer, we never touch it. Writing such a layer is left as an exercise to the reader :-)

]]> Online Ventolin Pharmacy - FDA Approved Pharmacy http://noehr.org/2009/08/27/bitwise-permissions-in-python-and-django/comment-page-1/#comment-2066 Alex Tue, 15 Sep 2009 01:16:12 +0000 http://noehr.org/?p=59#comment-2066 I agree that binary flags are an awesome way to store this data, however I can't fathom why you'd want to actually use the API of binary flags, instead of putting a pretty wrapper around it. I agree that binary flags are an awesome way to store this data, however I can’t fathom why you’d want to actually use the API of binary flags, instead of putting a pretty wrapper around it.

]]> Online Ventolin Pharmacy - FDA Approved Pharmacy http://noehr.org/2009/08/27/bitwise-permissions-in-python-and-django/comment-page-1/#comment-1979 bretth Fri, 28 Aug 2009 02:39:11 +0000 http://noehr.org/?p=59#comment-1979 Wow. This is great and would be much more flexible than the existing contrib.auth scheme. Never thought I'd need to use binary math again. Wow. This is great and would be much more flexible than the existing contrib.auth scheme. Never thought I’d need to use binary math again.

]]> Online Ventolin Pharmacy - FDA Approved Pharmacy http://noehr.org/2009/08/27/bitwise-permissions-in-python-and-django/comment-page-1/#comment-1975 bob_f Thu, 27 Aug 2009 11:24:46 +0000 http://noehr.org/?p=59#comment-1975 First post ! First post !

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