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Why are Oracle table/column/index names limited to 30 characters?
...s project that would almost certainly generate way more costs in developer time, QA time, and newly introduced bugs than it would generate benefits.
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How to save username and password with Mercurial?
... a personal project, and I have been typing my username and password every time I want to push something to the server.
8 A...
Filtering Pandas DataFrames on dates
...wo choices:
Make it the index (either temporarily or permanently if it's time-series data)
df[(df['date'] > '2013-01-01') & (df['date'] < '2013-02-01')]
See here for the general explanation
Note: .ix is deprecated.
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How to sort a list of strings?
...e, using cmp, is a deprecated solution, as it has to be evaluated multiple times - key is only computed once per element).
So, to sort according to the current locale, taking language-specific rules into account (cmp_to_key is a helper function from functools):
sorted(mylist, key=cmp_to_key(locale...
What does a colon following a C++ constructor name do? [duplicate]
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It is an initialization list.
By the time you get in the body of the constructor, all fields have already been constructed; if they have default constructors, those were already called. Now, if you assign a value to them in the body of the constructor, you are c...
How would one write object-oriented code in C? [closed]
...NULL -the behaviour would be slightly different to C++ (a core dump at run-time rather than an error at compile time).
Here's a piece of sample code that demonstrates it. First the top-level class structure:
#include <stdio.h>
// The top-level class.
typedef struct sCommClass {
int (*o...
HTML5 Local storage vs. Session storage
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The only difference is that localStorage has a different expiration time, sessionStorage will only be accessible while and by the window that created it is open. localStorage lasts until you delete it or the user deletes it.
Lets say that you wanted to save a login username and password you w...
How to clone all repos at once from GitHub?
...anization.
The maximum page-size is 100, so you have to call this several times with the right page number to get all your repositories (set PAGE to the desired page number you want to download).
Here is a shell script that does the above: https://gist.github.com/erdincay/4f1d2e092c50e78ae1ffa39d13...
Is 1.0 a valid output from std::generate_canonical?
...s with angles that are near multiples of pi. I would posit that 99% of the time, when code asks for sin(x), what it really wants is the sine of (π/Math.PI) times x. The people maintaining Java insist that it's better to have a slow math routine report that the sine of Math.PI is difference between ...
ActiveMQ or RabbitMQ or ZeroMQ or [closed]
...r in Java
Beanstalkd
written by Philotic, Inc. to improve the response time of a Facebook application
in-memory workqueue service mostly written in C
Docu: http://nubyonrails.com/articles/about-this-blog-beanstalk-messaging-queue
Amazon SQS
Amazon Simple Queue Service
Kafka
Written at Li...