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Elegant way to check for missing packages and install them?
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@krlmlr Nope, because in order for the if statement to be evaluated it must first evaluate require, the side-effect of which is loading the package if it is available!
– Simon O'Hanlon
Nov 8 '13 at 23:26
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Dependency Injection vs Factory Pattern
...plemented in many ways like DI using constructors, using mapping xml files etc.
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When should assertions stay in production code? [closed]
...age is compiled or interpreted, your roll-out plans, obfuscation strategy, etc. I have seen one case where a comment actually caused a bug, but that was a weird one.
– DaveWalley
Feb 25 '14 at 22:57
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Python argparse: How to insert newline in the help text?
... the right direction above. But that solution needs slight modification in order to format description section.
Anyway, custom formatter is needed. I extended existing HelpFormatter class and overrode _fill_text method like this:
import textwrap as _textwrap
class MultilineFormatter(argparse.HelpF...
Generating a random & unique 8 character string using MySQL
... => c81e728d
MD5(3) = eccbc87e4b5ce2fe28308fd9f2a7baf3 => eccbc87e
etc.
caveat: I have no idea how many you could allocate before a collision (but it would be a known and constant value).
edit: This is now an old answer, but I saw it again with time on my hands, so, from observation...
Ch...
How to configure a HTTP proxy for svn
...are two common approaches for this:
Specify http-proxy- options in your /etc/.subversion/servers or %APPDATA%\Subversion\servers file,
Use --config-option command-line option to specify the same http-proxy- options in single command-line you run. For example,
svn checkout ^
--config-option server...
Where does Jenkins store configuration files for the jobs it runs?
...n jenkins will be stored in jenkins server and you can find the config.xml etc., here.
After jenkins installation you will find jenkins workspace in server.
*cd>jenkins/jobs/`
cd>jenkins/jobs/$ls
job1 job2 job3 config.xml ....*
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Inherit docstrings in Python class inheritance
...le that can preserve both the inherited docstring syntax and the preferred ordering can be:
class X(object):
"""This class has a method foo()."""
def foo(): pass
class Y(X):
""" Also bar()."""
__doc__ = X.__doc__ + __doc__
def bar(): pass
With the same output as Alex's one:
>>&g...
How do I compare strings in Java?
...vailable since Java 1.5). Saves you from having to turn your StringBuffer, etc into a String before doing the equality comparison, but leaves the null checking to you.
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How to cancel/abort jQuery AJAX request?
...a request to a server, have it check to see if a progress is not null (or fetching that data) first. If it is fetching data, abort the previous request and initiate the new one.
var progress = null
function fn () {
if (progress) {
progress.abort();
}
progress = $.ajax('ajax...