...rchar, so no difference, see documentation :) The notations varchar(n) and char(n) are aliases for character varying(n) and character(n), respectively. character without length specifier is equivalent to character(1). If character varying is used without length specifier, the type ac...

I would like to start using compass and sass to speed up development. At the moment, I have installed Sass on a mac and instructed it to watch scss file for input, and a css file for generated output. ...

... The most readable way is x = 10 if a > b else 11 but you can use and and or, too: x = a > b and 10 or 11 The "Zen of Python" says that "readability counts", though, so go for the first way. Also, the and-or trick will fail if you put a variable instead of 10 and it evaluates to Fals...

I would like to limit the X and Y axis in matplotlib but for a speific subplot. As I can see subplot figure itself doesn't have any axis property. I want for example to change only the limits for the second plot! ...

mongodb, replicates and error: { “$err” : “not master and slaveOk=false”, “code” : 13435出现这个错误的原因是在从库上执行命令导致，默认情况下只有主库可以执行命令。当然可以通过设置使得从库也能执行命令，具体参见：http: s 出现...

...morphic. In the example map uses id as if it had type String -> String. And of course you can also pass a simple monomorphic function of the given type instead of id. Without rank2types there is no way for a function to require that its argument must be a polymorphic function and thus also no way...

...atibility with XHTML; to make it possible to write the same code as XHTML, and have it also work as HTML. Some systems that generate HTML may be based on XML generators, and thus do not have the ability to output just a bare <br> tag; if you're using such a system, it's fine to use <br/>...

...last. Mercurial keeps a transaction log of the name of each file touched and its length prior to the transaction. On abort, it truncates each file to its prior length. This simplicity is one benefit of making revlogs append-only. The transaction journal also allows an undo operation. See Tortoi...

...te easy to do. In summary: Install git Create a user named git Add your and your team's public keys to the git user's .ssh/authorized_keys file Change the git user's shell to be git-shell Create repos on the server start git pull/pushing to git@yourserver.com The only difference between using a...

...l non-cyclical paths between two nodes. This algorithm should be very fast and scale to large graphs (The graph data structure is sparse so it only uses as much memory as it needs to). I noticed that the graph you specified above has only one edge that is directional (B,E). Was this a typo or is it...