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Perl build, unit testing, code coverage: A complete working example
...ctiveState ActivePerl v5.10.0 on a Windows XP Pro PC, Module::Build, Test::More, Devel::Cover)
Start out with a directory for your Perl project and then create a "lib" directory and a "t" directory under your project directory:
HelloPerlBuildWorld
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|----------> lib
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Which version of PostgreSQL am I running?
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show 5 more comments
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Is there a way to get rid of accents and convert a whole string to regular letters?
...r.normalize(string, Normalizer.Form.NFD);
// or Normalizer.Form.NFKD for a more "compatable" deconstruction
This will separate all of the accent marks from the characters. Then, you just need to compare each character against being a letter and throw out the ones that aren't.
string = string.re...
How to get the class of the clicked element?
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what if the element has more than one class name?
– Dharman
Oct 5 '13 at 17:52
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Maximum and Minimum values for ints
...bits in a word will be math.log2(sys.maxsize * 2 + 2). See this answer for more information.
Python 2
In Python 2, the maximum value for plain int values is available as sys.maxint:
>>> sys.maxint
9223372036854775807
You can calculate the minimum value with -sys.maxint - 1 as shown her...
When should one use final for method parameters and local variables?
...s "righter". I wish it was the default. But it isn't and I find the code more difficult to understand with finals all over. If I'm in someone else's code, I'm not going to pull them out but if I'm writing new code I won't put them in. One exception is the case where you have to mark something fi...
Use RSA private key to generate public key?
...tracted from the private key file, not calculated. See my answer below for more details.
– golem
Jun 4 '17 at 17:27
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show 12 more comments
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MySQL, better to insert NULL or empty string?
...NULL you can distinguish between "put no data" and "put empty data".
Some more differences:
A LENGTH of NULL is NULL, a LENGTH of an empty string is 0.
NULLs are sorted before the empty strings.
COUNT(message) will count empty strings but not NULLs
You can search for an empty string using a bound...
Join/Where with LINQ and Lambda
...'re familiar with SQL syntax, using the LINQ query syntax is much clearer, more natural, and makes it easier to spot errors:
var id = 1;
var query =
from post in database.Posts
join meta in database.Post_Metas on post.ID equals meta.Post_ID
where post.ID == id
select new { Post = post, ...
What is attr_accessor in Ruby?
... the instance variables in the attr_* statement? It seems that it would be more straight forward to use the same '@' syntax that is used elsewhere in the class to refer to the variable.
– Will
May 24 '12 at 18:34
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