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How would you implement an LRU cache in Java?
...tc. Assume for purposes of this question that I want to implement my own using just the SDK (learning by doing). Given that the cache will be used in a multithreaded environment, which datastructures would you use? I've already implemented one using LinkedHashMap and Collections#synchronizedMap ,...
Parse error: Syntax error, unexpected end of file in my PHP code
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In case it helps anybody: I got a similar error, but caused by <? } ?> instead of <?php } ?>.
– Adam Libuša
Nov 7 '13 at 13:06
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Simulating group_concat MySQL function in Microsoft SQL Server 2005?
I'm trying to migrate a MySQL-based app over to Microsoft SQL Server 2005 (not by choice, but that's life).
11 Answers
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What is the best testing framework to use with Node.js? [closed]
I have looked at the rather long list of testing frameworks at https://github.com/ry/node/wiki/modules#testing . What is the experience with these frameworks?
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server certificate verification failed. CAfile: /etc/ssl/certs/ca-certificates.crt CRLfile: none
I can push by clone project using ssh, but it doesn't work when I clone project with https.
17 Answers
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It has a DefiningQuery but no InsertFunction element… err
This thing is driving me crazy, and the error is quite meaningless to me:
6 Answers
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How do you sort an array on multiple columns?
... @user26409021 - No, that's not right. It would end up being [[A, 5], [A, 10], [J, 5], [J, 15]]. It sorts by the first attribute first, and if those are the same, then it sorts by the second attribute. So in your example, A would come before J. In the case where A is the same fo...
Applying a function to every row of a table using dplyr?
When working with plyr I often found it useful to use adply for scalar functions that I have to apply to each and every row.
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How to prevent a dialog from closing when a button is clicked
I have a dialog with EditText for input. When I click the "yes" button on dialog, it will validate the input and then close the dialog. However, if the input is wrong, I want to remain in the same dialog. Every time no matter what the input is, the dialog should be automatically closed when I clic...
What do @, - and + do as prefixes to recipe lines in Make?
In the GNU Makefile manual, it mentions these prefixes.
2 Answers
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