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How to tell if UIViewController's view is visible
I have a tab bar application, with many views. Is there a way to know if a particular UIViewController is currently visible from within the UIViewController ? (looking for a property)
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How can I search Git branches for a file or directory?
...:22 2008 -0800
added somefile
% git branch -a --contains 55d2069
otherbranch
Supports globbing, too:
% git log --all -- '**/my_file.png'
The single quotes are necessary (at least if using the Bash shell) so the shell passes the glob pattern to git unchanged, instead of expanding it (ju...
Display number with leading zeros
...1,)
Basically % is like printf or sprintf (see docs).
For Python 3.+, the same behavior can also be achieved with format:
print("{:02d}".format(1))
For Python 3.6+ the same behavior can be achieved with f-strings:
print(f"{1:02d}")
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Extracting numbers from vectors of strings
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How about
# pattern is by finding a set of numbers in the start and capturing them
as.numeric(gsub("([0-9]+).*$", "\\1", years))
or
# pattern is to just remove _years_old
as.numeric(gsub(" years old", "", years))
or
# split by space, get the element in first index
as.numer...
Amazon SimpleDB vs Amazon DynamoDB
I have some basic understanding what Amazon SimpleDB is, but according to the Amazon DynamoDB description it seems to be almost the same: a NoSQL Key-value store service.
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Use variable with TOP in select statement in SQL Server without making it dynamic [duplicate]
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What makes it even more weird ... the brackets are essential! Without the brackets around "@top" you'll get an incorrect syntax. Thanks!
– Satria
Jul 23 '18 at 13:15
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Missing Javascript “.map” file for Underscore.js when loading ASP.NET web page [duplicate]
...is only happens for some JQuery source files and not all and I am not sure what the pattern is.
1 Answer
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Display open transactions in MySQL
...lp you, because you cannot commit a transaction from a broken connection.
What happens when a connection breaks
From the MySQL docs: http://dev.mysql.com/doc/refman/5.0/en/mysql-tips.html
4.5.1.6.3. Disabling mysql Auto-Reconnect
If the mysql client loses its connection to the server while...
How can I add a column that doesn't allow nulls in a Postgresql database?
...lution. I couldn't get to the online postgres docs for some reason to see what the syntax would be for this.
– Sean Bright
Feb 4 '09 at 17:48
4
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Is it possible to prevent an NSURLRequest from caching data or remove cached data following a reques
...ould load the request without checking the cache. The former is presumably what helps manage memory allocation.
– Christopher Pickslay
Nov 15 '11 at 22:09
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