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How to round an average to 2 decimal places in PostgreSQL?
... | numeric, int
The pg_catalog functions are the default ones, see manual of build-in math functions.
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Get current time in seconds since the Epoch on Linux, Bash
...f -v var '%(%s)T'
(but it might be wiser to always give the argument -1 nonetheless).
If you use -2 as argument instead of -1, Bash will use the time the shell was started instead of the current date. This can be used to compute elapsed times
$ printf -v beg '%(%s)T\n' -2
$ printf -v now '%(%s)...
Resetting generator object in Python
...behave the same way as calling a function that uses yield, and I only used one because it's less verbose than writing a function with yield for such a short example. In the second snippet, I've used FunctionWithYield as the generator_factory, so it will be called whenever iter is called, which is wh...
How to add 2 buttons into the UINavigationbar on the right side without IB?
...style.
// anyone know how to get it perfect?
tools.barStyle = -1; // clear background
NSMutableArray *buttons = [[NSMutableArray alloc] initWithCapacity:3];
// Create a standard refresh button.
UIBarButtonItem *bi = [[UIBarButtonItem all...
HTML / CSS How to add image icon to input type=“button”?
...n a POST / GET, it submits the 'values' for every button, and not just the one clicked, and 2) Instead of sending the actual value attribute, IE likes to send the contents (inner HTML) of the button. These facts make the <button> tag unreliable if the action taken depends on the button a user ...
How to force push a reset to remote repository?
...modified this setting in /opt/git/the_repo/the_repo.git/config. But once done the git push --force origin SHA:branch worked as required.
– HankCa
Jul 18 '15 at 13:35
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Load a WPF BitmapImage from a System.Drawing.Bitmap
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Would someone consider editing this answer so that all the (correct) comments are integrated into it? At the moment it's heavily upvoted, but not at all clear whether it's the answer or answer+comments that are 'right'...
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Correct way to add external jars (lib/*.jar) to an IntelliJ IDEA project
...Maven and Nexus for dependency management.
This is the way the world has gone. Every open source Java project that I know of uses Maven or Gradle. You should, too.
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Max length for client ip address [duplicate]
...(each of the numbers between the periods in an IP address are 0-255, i.e., one byte). But then you would have to translate going in and out of the DB and that's messy.
IPv6 addresses are 128 bits (as opposed to 32 bits of IPv4 addresses). They are usually written as 8 groups of 4 hex digits separ...
Why does git diff on Windows warn that the “terminal is not fully functional”?
...et correctly.
NOW YOU MUST RESTART YOUR SHELL (CMD.EXE). Just run a new one. And from there, you should have no more issues. Again:
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