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Design patterns or best practices for shell scripts [closed]
...on't have other resources to pass you but my personal experience.
Here is what I normally do, which is overkill, but tends to be solid, although very verbose.
Invocation
make your script accept long and short options. be careful because there are two commands to parse options, getopt and getopts....
Does const mean thread-safe in C++11?
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I hear that const means thread-safe in C++11. Is that true?
It is somewhat true...
This is what the Standard Language has to say on thread-safety:
[1.10/4]
Two expression evaluations conflict if one of them modifies a memory location (1.7) and the other one accesses or modifies the same memory...
Javascript web app and Java server, build all in Maven or use Grunt for web app?
... is flexible enough that with some elbow grease you can write a plugin for whatever you need. If you're confined to a Java based asset pipeline this is for sure the way to go. The issue with Wro4j is that it is slow ( even when it kicks off Node processes ) relative to Node based tools.
To give so...
Should I pass an std::function by const-reference?
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Ah, I see! This of course depends of what happens outside of run_in_ui_thread(). Is there just a signature to say "Pass by reference, but I won't store the address"?
– ceztko
May 8 '17 at 14:17
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Instance variables vs. class variables in Python
...aster than the same as instance variable on my old workstation -- not sure what codepath makes it so.
– Alex Martelli
Jan 21 '16 at 0:27
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Browsers' default CSS for HTML elements
...es to find all the default information. Or for all browsers, see html.spec.whatwg.org/multipage/rendering.html .
– David Spector
Aug 19 '19 at 15:48
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Unpacking, extended unpacking and nested extended unpacking
... we undo the substitution.
((a, b), c) = ((1, 2), 'this')
Now let's see what happens when we wrap c in a tuple:
(a,b), (c,) = [1,2],'this' # ERROR -- too many values to unpack
Becomes
((a, b), (c,)) = ((1, 2), ('t', 'h', 'i', 's'))
Again, the error is obvious. c is no longer a nak...
Pros and cons of AppSettings vs applicationSettings (.NET app.config / Web.config)
...access it as ConfigurationManager["(key)"] and then it's up to you to know what you're dealing with.
Also, over time, the <appSettings> can get rather convoluted and messy, if lots of parts of your app start putting stuff in there (remember the old windows.ini file? :-)).
If you can, I woul...
Solving “Who owns the Zebra” programmatically?
...rwegian"])
# The green house is on the left side of the white house.
#XXX: what is "the left side"? (linear, circular, two sides, 2D house arrangment)
#NOTE: interpret it as 'green house number' + 1 == 'white house number'
problem.addConstraint(lambda a,b: a+1 == b, ["green", "white"])
def add_cons...
How to check whether a pandas DataFrame is empty?
... practice if it's expected that the variable will be a DataFrame (which is what the OP implies) that is either empty or has rows. If it's not a DF (or if it's none), an exception should be thrown since something went wrong somewhere.
– fgblomqvist
Sep 19 '19 at...