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CATALINA_OPTS vs JAVA_OPTS - What is the difference?
I was trying to find out the difference between Apache Tomcat variables - CATALINA_OPTS and JAVA_OPTS in SO and surprised to see that there is no question/answer posted here yet. So I thought of sharing it here (with answer) after finding out the difference. Check the answer/difference below...
MySQL Delete all rows from table and reset ID to zero
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Truncate works well with non-constrained tables, but if your table has a Foreign Key constraint, you may consider using the Delete method. See this post if you have FK constraints: truncate foreign key constrained table
– Julian Soro
May 1...
scp with port number specified
...s an explanation of why uppercase P was chosen for scp:
-P port Specifies the port to connect to on the remote host. Note that this option is written with a capital 'P', because -p is already
reserved for preserving the times and modes of the file in rcp(1).
-p Pres...
How can I set Image source with base64
...sed on your personal opinion, and really a waste of my personal time. Also if you check the project, it is still maintained and has a huge follower base. github.com/jquery/jquery/commits/master
– Faris Zacina
Apr 25 '16 at 17:33
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Generate an integer that is not among four billion given ones
...to find of which of the possible numbers in that bucket are used already.
If it means more than 32 bits, but still of bounded size: Do as above, ignoring all input numbers that happen to fall outside the (signed or unsigned; your choice) 32-bit range.
If "integer" means mathematical integer: Read ...
How to prepend a string to a column value in MySQL?
... the CONCAT function to do that:
UPDATE tbl SET col=CONCAT('test',col);
If you want to get cleverer and only update columns which don't already have test prepended, try
UPDATE tbl SET col=CONCAT('test',col)
WHERE col NOT LIKE 'test%';
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Common MySQL fields and their appropriate data types
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@Raveren: This is storage engine specific - and storage is not the only cost. Sorting data and temporary tables (memory engine) will use the fixed amount.
– Morgan Tocker
Sep 17 '10 at 15:34
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Using helpers in model: how do I include helper dependencies?
...coupling. [Use case is multi domain app, that issues emails via a model notifier with a url link back to the app - this url changes depending on the domain of web request]
– iheggie
Mar 12 '15 at 7:45
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C# DropDownList with a Dictionary as DataSource
...l yield KeyValuePair<TKey,TValue> objects... so you just need to specify "Value" and "Key" for DataTextField and DataValueField respectively, to select the Value/Key properties.
Thanks to Joe's comment, I reread the question to get these the right way round. Normally I'd expect the "key" in t...