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How do I check for a network connection?
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JavaScript: Is there a way to get Chrome to break on all errors?
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Edit: The original link I answered with is now invalid.The newer URL would be https://developers.google.com/web/tools/chrome-devtools/javascript/add-breakpoints#exceptions as of 2016-11-11.
I realize this question has an answer, but it's no longer accurate. Use the link above...
SQLAlchemy: Creating vs. Reusing a Session
...ain. The links it holds to your mapped objects are weak referencing, provided the objects are clean of pending changes, so even in that regard the Session will empty itself out back to a brand new state when your application loses all references to mapped objects. If you leave it with its default...
SQL Server equivalent to MySQL enum data type?
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Why not use a table that defines valid values, and then use a foreign key constraint instead?
– Elaskanator
Dec 5 '18 at 17:04
1
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Why use argparse rather than optparse?
... one-or-more style arguments
producing more informative usage messages
providing a much simpler interface for custom types and actions
More information is also in PEP 389, which is the vehicle by which argparse made it into the standard library.
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How can I move a single directory from a git repository to a new repository whilst maintaining the h
...ts in separate directories. I'd like to split the repository into new individual repositories, one for each project and then have the master repository contain the projects as submodules. I'd like to do all this whilst maintaining the revision history of the individual projects if possible.
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How to pass data from 2nd activity to 1st activity when pressed back? - android
... data back from Activity2 to Activity1. In Activity1 you will need to override onActivityResult for updating TextView with EditText data from Activity2.
For example:
In Activity1, start Activity2 as:
Intent i = new Intent(this, Activity2.class);
startActivityForResult(i, 1);
In Activity2, use s...
Why is SSE scalar sqrt(x) slower than rsqrt(x) * x?
...= 0 * INF = NaN. INFrsqrt(INF) = INF * 0 = NaN. For this reason, CUDA on NVIDIA GPUs computes approximate single-precision square roots as recip(rsqrt(x)), with the hardware providing both a fast approximation to the reciprocal and the reciprocal square root. Obviously, explicit checks handling the ...
Remote branch is not showing up in “git branch -r”
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It didn't help.
– dKab
Mar 20 '17 at 15:31
I th...
Assign multiple columns using := in data.table, by group
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