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What is the simplest SQL Query to find the second largest value?
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This is the standard way to do this. The accepted answer should be updated to this one.
– Guilherme Melo
Apr 29 '14 at 14:39
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Stack, Static, and Heap in C++
...'ve searched, but I've not understood very well these three concepts. When do I have to use dynamic allocation (in the heap) and what's its real advantage? What are the problems of static and stack? Could I write an entire application without allocating variables in the heap?
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Disable Logback in SpringBoot
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It doesn't work for me because if I add those exclusions I get: java.lang.ClassNotFoundException: org.apache.commons.logging.LogFactory.
– Ariel
Sep 15 '14 at 11:10
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grant remote access of MySQL database from any IP address
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TO 'user'@'%'
% is a wildcard - you can also do '%.domain.com' or '%.123.123.123' and things like that if you need.
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How to clear/remove observable bindings in Knockout.js?
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Have you tried calling knockout's clean node method on your DOM element to dispose of the in memory bound objects?
var element = $('#elementId')[0];
ko.cleanNode(element);
Then applying the knockout bindings again on just that element with your new view models would update your vi...
Changing user agent on urllib2.urlopen
How can I download a webpage with a user agent other than the default one on urllib2.urlopen?
9 Answers
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Why does viewWillAppear not get called when an app comes back from the background?
...d, your UIViewController which was already visible when you left your app 'doesn't care' so to speak -- as far as it is concerned, it's never disappeared and it's still visible -- and so viewWillAppear isn't called.
I recommend against calling the viewWillAppear yourself -- it has a specific meanin...
Remove all unused resources from an android project
...de resources you want to keep by right-clicking on the resource item.
Use Do Refactor to remove all Resources at once.
Update: use ⌘OptionShifti for mac
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Ruby: How to turn a hash into HTTP parameters?
...our self-answer is a good one, and I've shameless borrowed from it, but it doesn't properly escape reserved characters, and there are a few other edge cases where it breaks down.
require "addressable/uri"
uri = Addressable::URI.new
uri.query_values = {:a => "a", :b => ["c", "d", "e"]}
uri.que...
How do I analyze a program's core dump file with GDB when it has command-line parameters?
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(gdb) core <core-file>
When using the core file you don't have to pass arguments. The crash scenario is shown in GDB (checked with GDB version 7.1 on Ubuntu).
For example:
$ ./crash -p param1 -o param2
Segmentation fault (core dumped)
$ gdb ./crash core
GNU gdb (GDB) 7.1-ubu...