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Rails: How do I create a default value for attributes in Rails activerecord's model? [duplicate]
...it is already set to false (because false and nil are both as falsy). I.e. x ||= true is equivalent to x = true. You can see how that might pose a problem. It only happens with booleans because no other datatype in Ruby has a falsy value.
– Amadan
Jun 10 '13 at...
What do people think of the fossil DVCS? [closed]
... an sQLite database is arguably safer than any other approach. See link text for some of the advantages of using a transactional database to store a repository. As for bloat: The entire thing is in a single self-contained executable which seems to disprove that concern.
Full disclosure: I am th...
How to quit scala 2.11.0 REPL?
In the last version of scala (2.10.3) REPL, I can type exit to quit from REPL. However, in Scala 2.11.0 this doesn't work.
...
How do multiple clients connect simultaneously to one port, say 80, on a server? [duplicate]
...teless protocol (ie UDP), there is no problem because "connections" don't exist - multiple people can send packets to the same port, and their packets will arrive in whatever sequence. Nobody is ever in the "connected" state.
For a stateful protocol (like TCP), a connection is identified by a 4-tu...
How to download image using requests
... With the help of your answer I could able to find data in text file, steps I used are r2 = requests.post(r.url, data); print r2.content. But now I also want to know filename. is their any cleaned way? -- presently I found file name in header -- r2.headers['content-disposition'] that ...
Secure hash and salt for PHP passwords
...gth of a password. If your users want a sentence with supercalifragilisticexpialidocious in it, don't prevent them from using it.
Don't strip or escape HTML and special characters in the password.
Never store your user's password in plain-text.
Never email a password to your user except when they ha...
In laymans terms, what does 'static' mean in Java? [duplicate]
...
Great explanation! I appreciate it.
– stackexchange12
Feb 12 '14 at 14:01
...
Algorithm to find top 10 search terms
... the problem at hand which I picked from the above:
Manku, Motwani - "Approximate Frequency Counts over Data Streams" [pdf]
By the way, Motwani, of Stanford, (edit) was an author of the very important "Randomized Algorithms" book. The 11th chapter of this book deals with this problem. Edit: Sorry, ...
Using LIMIT within GROUP BY to get N results per group?
... rate DESC) grouped_year
FROM
yourtable
GROUP BY id) group_max
ON yourtable.id = group_max.id
AND FIND_IN_SET(year, grouped_year) BETWEEN 1 AND 5
ORDER BY
yourtable.id, yourtable.year DESC;
Please see fiddle here.
Please note that if more than one row can have the same rate...