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Best practice to validate null and empty collection in Java
I want to verify whether a collection is empty and null . Could anyone please let me know the best practice.
9 Answers
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How do I close all open tabs at once?
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Shortest/simplest/fastest way would be:
:qa
To save work in all tabs and quit:
:wqa
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Split a python list into other “sublists” i.e smaller lists [duplicate]
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If you have a list and want a list, there's no reason to bother with itertools. They only make sense if you want to split up a stream of data without ever creating the entire thing.
– alexis
Mar 12 '12 at ...
How do you parse and process HTML/XML in PHP?
How can one parse HTML/XML and extract information from it?
30 Answers
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How to pass variable number of arguments to a PHP function
...unction that takes a variable number of arguments (using func_num_args() and func_get_args() ), but the number of arguments I want to pass the function depends on the length of an array. Is there a way to call a PHP function with a variable number of arguments?
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How to serialize SqlAlchemy result to JSON?
... {}
for field in [x for x in dir(obj) if not x.startswith('_') and x != 'metadata']:
data = obj.__getattribute__(field)
try:
json.dumps(data) # this will fail on non-encodable values, like other classes
fields[field]...
How do I find the current executable filename? [duplicate]
...n.Assembly.GetCallingAssembly().Location
If you'd like just the filename and not the path, use:
Path.GetFileName(System.Reflection.Assembly.GetEntryAssembly().Location)
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What is so bad about singletons? [closed]
.... I still use quite a lot of singletons, especially for factory classes , and while you have to be a bit careful about multithreading issues (like any class actually), I fail to see why they are so awful.
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Get yesterday's date in bash on Linux, DST-safe
I have a shell script that runs on Linux and uses this call to get yesterday's date in YYYY-MM-DD format:
10 Answers
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Switch statement: must default be the last case?
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The C99 standard is not explicit about this, but taking all facts together, it is perfectly valid.
A case and default label are equivalent to a goto label. See 6.8.1 Labeled statements. Especially interesting is 6.8.1.4, which enables...