Comments on: Constants Are a Scam http://www.bigvisible.com/asroka/constants-are-a-scam/ Fri, 03 Sep 2010 00:28:08 +0000 http://wordpress.org/?v=2.9.2 hourly 1 By: asroka http://www.bigvisible.com/asroka/constants-are-a-scam/comment-page-1/#comment-20838 asroka Sun, 29 Nov 2009 19:21:05 +0000 http://www.bigvisible.com/?p=533#comment-20838 Thanks, Marcos. It is probably better to say PI = 3.14159265 and then use PI in my calculation. That is called an "explaining variable." It makes it much clearer what the number means. However, there are a limited number of ways to use pi: volume of a sphere, angular distance, etc. Those things should probably be in one place in my code and not several. Local explaining variables are an exceptionally good idea. Public constants are likely to violate encapsulation. Thanks, Marcos.

It is probably better to say PI = 3.14159265 and then use PI in my calculation. That is called an “explaining variable.” It makes it much clearer what the number means. However, there are a limited number of ways to use pi: volume of a sphere, angular distance, etc. Those things should probably be in one place in my code and not several.

Local explaining variables are an exceptionally good idea. Public constants are likely to violate encapsulation.

]]> By: Marcos Silva Pereira http://www.bigvisible.com/asroka/constants-are-a-scam/comment-page-1/#comment-20821 Marcos Silva Pereira Sun, 29 Nov 2009 05:32:58 +0000 http://www.bigvisible.com/?p=533#comment-20821 Sometimes is not about have just one place to change, but it's about readability. Is easy to read/understand ITEMS_AMOUNT than just 10. Sometimes is not about have just one place to change, but it’s about readability. Is easy to read/understand ITEMS_AMOUNT than just 10.

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