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What is the volatile keyword useful for?
At work today, I came across the volatile keyword in Java. Not being very familiar with it, I found this explanation .
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Log exception with traceback
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Use logging.exception from within the except: handler/block to log the current exception along with the trace information, prepended with a message.
import logging
LOG_FILENAME = '/tmp/logging_example.out'
logging.basicConfig(filena...
why unaligned apk is needed?
Android gradle produces apk in two binaries: unaligned and aligned.
2 Answers
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Why use Dijkstra's Algorithm if Breadth First Search (BFS) can do the same thing faster?
Both can be used to find the shortest path from single source. BFS runs in O(E+V) , while Dijkstra's runs in O((V+E)*log(V)) .
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postgresql - add boolean column to table set default
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ADD COLUMN "priv_user" BOOLEAN NOT NULL DEFAULT FALSE;
UPDATE: following is only true for versions before postgresql 11.
As Craig mentioned on filled tables it is more efficient to split it into steps:
ALTER TABLE users ADD COLUMN priv_user BOOLEAN;
UPDATE users SET priv_user = 'f';
ALTER TA...
How to execute ipdb.set_trace() at will while running pytest tests
I'm using pytest for my test suite. While catching bugs in complex inter-components test, I would like to place import ipdb; ipdb.set_trace() in the middle of my code to allow me to debug it.
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Express command not found
For some reason after installing Express globally on my machine with npm install -g express if I cd into a directory and try to run express I get the following error:
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How to exit a function in bash
How would you exit out of a function if a condition is true without killing the whole script, just return back to before you called the function.
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WPF TemplateBinding vs RelativeSource TemplatedParent
What is the difference between these 2 bindings:
6 Answers
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Are “elseif” and “else if” completely synonymous?
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From the PHP manual:
In PHP, you can also write 'else if' (in two words) and the behavior would be identical to the one of 'elseif' (in a single word). The syntactic meaning is slightly different (if you're familiar with C, this is the same behav...