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Best way to test if a row exists in a MySQL table
...OM test WHERE text LIKE '%something%'
LIMIT 1) : 0.044898986816406s.
But now, with a BIGINT PK field, only one entry is equal to '321321' :
SELECT * FROM test2 WHERE id ='321321' LIMIT 1 with
mysql_num_rows() : 0.0089840888977051s.
SELECT count(*) as count FROM test2 WHERE id ='321321' : 0.0003...
No 'Access-Control-Allow-Origin' - Node / Apache Port Issue
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You are my favorite person ever right now. Thank you. Can we add a note that this code has to happen before the routes are defined for noobs like me?
– gegillam
Feb 4 '16 at 3:01
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Counting null and non-null values in a single query
...n this as a "run once query to spot how many nulls we have", I don't even know why ^^', going to correct, thanks.
– Alberto Zaccagni
Aug 13 '09 at 13:29
1
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Can grep show only words that match search pattern?
... I'm not sure under what conditions it does and doesn't display, but I do know that when I used grep across a number of directories it did display the full file path for all matched files, whereas with -h it just displayed the matched words without any specification about which file it is. So, to m...
Remove empty space before cells in UITableView
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As far as I know, scroll view content insets are adjusted automatically (if automaticallyAdjustsScrollViewInsets = YES, which it by default is) only if the scroll view is the first child in the view controller view hierarchy. My guess is ...
How do I set GIT_SSL_NO_VERIFY for specific repos only?
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@Thirumalaimurugan Are you serious right now? sudo should only be used when you actually need root to do something. Like installing new software, modifying important system files, reformatting drives, reconfiguring the network, managing services... There was nothing...
How do I assert my exception message with JUnit Test annotation?
...7 doesn't provide this feature but does any future versions provide it? I know in .NET you can assert the message and the exception class. Looking for similar feature in the Java world.
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javascript function leading bang ! syntax
I've been seeing this syntax on a few libraries now and I'm wondering what the benefit is. (note i'm well aware of closures and what the code is doing, I'm only concerned about the syntactical differences)
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How to check if a process id (PID) exists
...s -p $PID > /dev/null
then
echo "$PID is running"
# Do something knowing the pid exists, i.e. the process with $PID is running
fi
The problem with:
kill -0 $PID
is the exit code will be non-zero even if the pid is running and you dont have permission to kill it. For example:
kill -0 1...
What is a covariant return type?
...n explicit reference to a MyFoo object will be able to invoke clone() and know (without casting) that the return value is an instance of MyFoo. Without covariant return types, the overridden method in MyFoo would have to be declared to return Object - and so calling code would have to explicitly do...