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Is it OK to leave a channel open?
...e it's nondeterministic. Most common related gotcha is too many open files error. You keep opening files... You expect GC to do so... You don't run out of memory (therefore GC doesn't kick in)... You run out of file descriptors at the OS level. OS kills the process :)
– Pijusn
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Execute Python script via crontab
...e the file appears a message: "/tmp/crontab.JTQ0My/crontab":22: bad minute errors in crontab file, can't install. Do you want to retry the same edit? (y/n)" if I type "y", I've returned to file edit. And if I type "n" the file is not saved. I add this line at last line of the file: "/1 * * * * /usr...
How do I remove/delete a virtualenv?
...em to set up the environment in the first place, which would usually be an error.
– tripleee
Apr 13 '19 at 14:40
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Is there a max array length limit in C++?
...e factors as external disturbances and thus as possible sources of runtime errors, and to carefully check&react to memory-allocation related errors in your program code.
So finally: while C++ does not impose any limits, you still have to check for adverse memory-related conditions when running y...
PostgreSQL: Which Datatype should be used for Currency?
... That's not why you avoid floating point. Even Numeric will have rounding errors if you divide by anything that doesn't divide into a power of ten, no matter what precision you use. (Precision of 2 is a Bad Idea anyway... check the docs.)
– Doradus
Jan 9 '18 ...
Writing to output window of Visual Studio
...ied Debug.Write , Console.Write , and Trace.Write . It does not give an error, but it does not print anything either.
13...
Python syntax for “if a or b or c but not all of them”
...'x', 'y', 'z'])
args = parser.parse_args()
if len(args.abc) != 3:
parser.error('expected 3 arguments')
print(args.abc)
Here are some usage examples:
# default case
wim@wim-zenbook:/tmp$ ./three_or_none.py
['x', 'y', 'z']
# explicit case
wim@wim-zenbook:/tmp$ ./three_or_none.py 1 2 3
['1', '2'...
How to set request headers in rspec request spec?
...
Yeah. In rspec it raises ndefined method 'header' error for me.
– Евгений Масленков
Oct 19 '17 at 10:11
add a comment
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Constructor function vs Factory functions
...an't forget new with a class constructor, or the constructor will throw an error.
If you do the instanceof check, it leaves ambiguity as to whether or not new is required. In my opinion, it shouldn't be. You've effectively short circuited the new requirement, which means you could erase drawback #1....
SQL/mysql - Select distinct/UNIQUE but return all columns?
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The query won't parse for me and gives an error: The ranking function "row_number" must have an ORDER BY clause. We need to add order by clause after partition by field1. So the correct query will be select * from ( select *, row_number() over (partiti...