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Fast way to discover the row count of a table in PostgreSQL
...stimates can be greater than the actual row count for various reasons. Not least, deletes may have happened in the meantime.
– Erwin Brandstetter
Dec 3 '15 at 8:16
2
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How do I remove lines between ListViews on Android?
...hich one is the best (I don't even know is there is a best way). I know at least two different ways to do this in a ListView:
1. Set divider to null:
1.1. Programmatically
yourListView.setDivider(null);
1.2. XML
This goes inside your ListView element.
android:divider="@null"
2. Set divider ...
Recent file history in Vim?
...
At least terminal vim stores the previous ten files into ~/.viminfo in the filemarks section. You can use '0, '1, '2, ... '9 to jump among them.
(Probably only useful for '0 to get back to the last file you were editing, unles...
How to reliably guess the encoding between MacRoman, CP1252, Latin1, UTF-8, and ASCII
...l decode successfully as UTF-8 is vanishingly small.
UTF-8 strategies (in least preferred language):
# 100% Unicode-standard-compliant UTF-8
def utf8_strict(text):
try:
text.decode('utf8')
return True
except UnicodeDecodeError:
return False
# looking for almost all...
How to assign the output of a Bash command to a variable? [duplicate]
...e used for variables meaningful to the shell itself, whereas names with at least one lower-case character are guaranteed not to have unintended side effects in POSIX-compliant shells. For example, on ksh93, JOBMAX changes the number of background tasks that can be running at once; it's not hard to i...
Eclipse error: “The import XXX cannot be resolved”
...
This bug is now at least 9 years old.
– user1133275
Mar 28 '19 at 16:40
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Auto-expanding layout with Qt-Designer
...
Once you have add your layout with at least one widget in it, select your window and click the "Update" button of QtDesigner. The interface will be resized at the most optimized size and your layout will fit the whole window. Then when resizing the window, the la...
Go to Matching Brace in Visual Studio?
...idn't work for me). You can re-enable the binding easy enough though - at least so I thought:
I tried this procedure:
Go to menu Tools -> Options -> Environment -> Keyboard
Scroll to, or search for the command Edit.GotoBrace
Assign the desired shortcut (mine was empty, so I put in CTRL...
Difference between const & const volatile
...nged by the code (an error will be raised due to the const qualifier) - at least through that particular name/pointer.
The volatile part of the qualifier means that the compiler cannot optimize or reorder access to the object.
In an embedded system, this is typically used to access hardware regist...
What is the Sign Off feature in Git for?
...code from Unix, I wouldn't have permission to release it under the GPL (at least without signoff from someone higher up). Or, a patch may make it between several different maintainers before winding up in the kernel tree; the signoff indicates the chain of custody. Read the certificate of origin tha...