Comments for Controul http://blog.controul.com Elaborations on flash. Sun, 01 Apr 2012 14:48:33 -0700 hourly 1 http://wordpress.org/?v=3.1.3 Comment on Random numbers: standard normal distribution in flash/as3 by hristo http://blog.controul.com/2009/04/standard-normal-distribution-in-as3/comment-page-1/#comment-299 hristo Sun, 01 Apr 2012 14:48:33 +0000 http://blog.controul.com/?p=138#comment-299 Hey Chuck, Standard normal numbers are not bound between 0 and 1. They are instead centered on 0 and have a standard deviation of 1. Have a look at this: http://en.wikipedia.org/wiki/Normal_distribution#Standardizing_normal_random_variables Which means that a standard normal number can theoretically go as high and low as positive or negative infinity, although obviously this is infinitely unlikely (and of course impossible in this implementation). If you want numbers in the (0,1) range, you're probably talking about the uniform distribution. Hey Chuck,

Standard normal numbers are not bound between 0 and 1. They are instead centered on 0 and have a standard deviation of 1.

Have a look at this:
http://en.wikipedia.org/wiki/Normal_distribution#Standardizing_normal_random_variables

Which means that a standard normal number can theoretically go as high and low as positive or negative infinity, although obviously this is infinitely unlikely (and of course impossible in this implementation).

If you want numbers in the (0,1) range, you’re probably talking about the uniform distribution.

]]> Comment on How slow is static access in as3/avm2 (exactly) by SEREN SKYE BLOG » Blog Archive » Static Methods – a Marriage http://blog.controul.com/2009/04/how-slow-is-static-access-in-as3avm2-exactly/comment-page-1/#comment-295 SEREN SKYE BLOG » Blog Archive » Static Methods – a Marriage Fri, 23 Sep 2011 08:04:26 +0000 http://blog.controul.com/?p=115#comment-295 [...] to litter the API with additional static methods. If all else fails, consider that generally static methods seem to be slower in Flash and so you probably want a good reason to use one over an instance method. Here’s [...] [...] to litter the API with additional static methods. If all else fails, consider that generally static methods seem to be slower in Flash and so you probably want a good reason to use one over an instance method. Here’s [...]

]]> Comment on Producing video with flash/air: png sequence rendering from swf playback by hristo http://blog.controul.com/2009/12/producing-video-with-flashair-png-sequence-rendering-from-swf-playback/comment-page-1/#comment-292 hristo Sat, 25 Jun 2011 11:40:51 +0000 http://blog.controul.com/?p=352#comment-292 Thanks, I'll have a look - the benchmark results look pretty impressive! Thanks, I’ll have a look – the benchmark results look pretty impressive!

]]> Comment on Producing video with flash/air: png sequence rendering from swf playback by Karim http://blog.controul.com/2009/12/producing-video-with-flashair-png-sequence-rendering-from-swf-playback/comment-page-1/#comment-291 Karim Sat, 25 Jun 2011 11:35:51 +0000 http://blog.controul.com/?p=352#comment-291 Also, check this one out - faster PNG Encoder: http://www.flasher.ru/forum/blog.php?b=203 Also, check this one out – faster PNG Encoder: http://www.flasher.ru/forum/blog.php?b=203

]]> Comment on A diff/patch solution for Flash: a proof of concept Monte Carlo algorithm for comparing text versions in as3 by Alex http://blog.controul.com/2009/05/diff-patch-for-flash-as3/comment-page-1/#comment-290 Alex Tue, 21 Jun 2011 07:37:22 +0000 http://blog.controul.com/?p=217#comment-290 Thanks again Hristo, Indeed i commented out string encoding and that led to the problem i mentioned earlier (for some reason i thought that encoding is only used for safely transporting diff results via GET/POST requests and i can turn it off safely) Well everything went ok after i uncommented it out. Regarding a Js port of this algorithm - isn't it already ported ? http://neil.fraser.name/software/diff_match_patch/svn/trunk/demos/demo_diff.html Thanks again Hristo,
Indeed i commented out string encoding and that led to the problem i mentioned earlier (for some reason i thought that encoding is only used for safely transporting diff results via GET/POST requests and i can turn it off safely)
Well everything went ok after i uncommented it out.

Regarding a Js port of this algorithm – isn’t it already ported ?
http://neil.fraser.name/software/diff_match_patch/svn/trunk/demos/demo_diff.html

]]> Comment on A diff/patch solution for Flash: a proof of concept Monte Carlo algorithm for comparing text versions in as3 by hristo http://blog.controul.com/2009/05/diff-patch-for-flash-as3/comment-page-1/#comment-289 hristo Mon, 20 Jun 2011 14:57:53 +0000 http://blog.controul.com/?p=217#comment-289 The correct pseudo-unified-diff output would be: @@ -14,4 +14,14 @@ est3 +xxx
\n xxx Which happens above just as you would expect it to but i'm seeing another issue above that should be related to the parser i need to put this on github and make a js port of it as well, that would make it SO MUCH EASIER to manage The correct pseudo-unified-diff output would be:

@@ -14,4 +14,14 @@
est3
+xxx
\n xxx

Which happens above just as you would expect it to
but i’m seeing another issue above that should be related to the parser

i need to put this on github and make a js port of it as well, that would make it SO MUCH EASIER to manage

]]> Comment on A diff/patch solution for Flash: a proof of concept Monte Carlo algorithm for comparing text versions in as3 by Alex http://blog.controul.com/2009/05/diff-patch-for-flash-as3/comment-page-1/#comment-288 Alex Fri, 17 Jun 2011 18:45:12 +0000 http://blog.controul.com/?p=217#comment-288 It's me again, now my question could seem interesting to you. As you can see by my posts i did some studying of your fast-diff port :) I am trying to create an as3 based program for comparing texts. For that i need to get positions of letters in text which should be highlighted (removed letters from one document and added letters in another document) The problem is that it's not possible to get which symbols were added or removed with used Diff output format. And i think that the format used is not correct and doesn't correspond to unified diff format. For example, consider comparing 2 texts (i'll write newline character as "\n") text 1: test1 test2 test3 text 2: test1 test2 test3xxx
\n xxx Raw output of Diff command would be: @@ -14,4 +14,12 @@\n est3\n+xxx\n xxx which is: @@ -14,4 +14,12 @@ est3 +xxx xxx In fact we know that both 'xxx' were added in second text. But according to the format used we should select only the first one 'xxx' because it's preceded by a "+" sign. There is no way we can tell that second 'xxx' should be marked as 'added'. So it seems like there is a bug in a format or in the implementation of algorithm. Hope to read your reply Thanks ! :) It’s me again, now my question could seem interesting to you.
As you can see by my posts i did some studying of your fast-diff port :)

I am trying to create an as3 based program for comparing texts. For that i need to get positions of letters in text which should be highlighted (removed letters from one document and added letters in another document)

The problem is that it’s not possible to get which symbols were added or removed with used Diff output format. And i think that the format used is not correct and doesn’t correspond to unified diff format.

For example, consider comparing 2 texts (i’ll write newline character as “\n”)

text 1:
test1 test2 test3

text 2:
test1 test2 test3xxx
\n xxx

Raw output of Diff command would be:
@@ -14,4 +14,12 @@\n est3\n+xxx\n xxx

which is:
@@ -14,4 +14,12 @@
est3
+xxx
xxx

In fact we know that both ‘xxx’ were added in second text. But according to the format used we should select only the first one ‘xxx’ because it’s preceded by a “+” sign. There is no way we can tell that second ‘xxx’ should be marked as ‘added’. So it seems like there is a bug in a format or in the implementation of algorithm.

Hope to read your reply
Thanks ! :)

]]> Comment on A diff/patch solution for Flash: a proof of concept Monte Carlo algorithm for comparing text versions in as3 by Alex http://blog.controul.com/2009/05/diff-patch-for-flash-as3/comment-page-1/#comment-287 Alex Tue, 14 Jun 2011 13:23:13 +0000 http://blog.controul.com/?p=217#comment-287 oops... somehow i couldn't find this commented method before thanks a lot :) oops… somehow i couldn’t find this commented method before
thanks a lot :)

]]> Comment on A diff/patch solution for Flash: a proof of concept Monte Carlo algorithm for comparing text versions in as3 by hristo http://blog.controul.com/2009/05/diff-patch-for-flash-as3/comment-page-1/#comment-286 hristo Tue, 14 Jun 2011 10:43:15 +0000 http://blog.controul.com/?p=217#comment-286 Hey Alex, The demos above use the .show() method of the Patch class, which I think is commented out in the sources above, but it works once you've parsed the diff data into the internal representation of the Patch object, and uses this state to render the output in a text field. .show is really a debug method, but you can see how you could build something of your own -essentially it iterates over the chuncks and renders inserts and deletes from the diff data and renders the "kept" chuncks from the original string. It's quite simple really. What is your worry? Hey Alex,

The demos above use the .show() method of the Patch class, which I think is commented out in the sources above, but it works once you’ve parsed the diff data into the internal representation of the Patch object, and uses this state to render the output in a text field.

.show is really a debug method, but you can see how you could build something of your own -essentially it iterates over the chuncks and renders inserts and deletes from the diff data and renders the “kept” chuncks from the original string. It’s quite simple really.

What is your worry?

]]> Comment on A diff/patch solution for Flash: a proof of concept Monte Carlo algorithm for comparing text versions in as3 by Alex http://blog.controul.com/2009/05/diff-patch-for-flash-as3/comment-page-1/#comment-285 Alex Tue, 14 Jun 2011 10:33:25 +0000 http://blog.controul.com/?p=217#comment-285 Thanks for adding source code ! I have a question - i have problems parsing Diff command output and would like to ask you how do you generate human readable representation of diff command ? Parsing diff result chunk by chunk doesn't seem such a good idea for me. Thanks for adding source code !
I have a question – i have problems parsing Diff command output and would like to ask you how do you generate human readable representation of diff command ?

Parsing diff result chunk by chunk doesn’t seem such a good idea for me.

]]>