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Are foreign keys really necessary in a database design?
... at the data level. They also improve performance because they're normally indexed by default.
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iOS (iPhone, iPad, iPodTouch) view real-time console log terminal
...
The solution documented by Apple in Technical Q&A QA1747 Debugging Deployed iOS Apps for Xcode 6 is:
Choose Window -> Devices from the Xcode menu.
Choose the device in the left column.
Click the up-triangle at the bottom left of the right hand panel to show the ...
Using arrays or std::vectors in C++, what's the performance gap?
...en from the internet):
// Comparison of assembly code generated for basic indexing, dereferencing,
// and increment operations on vectors and arrays/pointers.
// Assembly code was generated by gcc 4.1.0 invoked with g++ -O3 -S on a
// x86_64-suse-linux machine.
#include <vector>
struct...
OS X Bash, 'watch' command
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Also, it's echo "$(date)" equivalent to date?
– Daniel Lubarov
Nov 27 '13 at 5:02
5
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When would you call java's thread.run() instead of thread.start()?
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Taken form the Code Style Java threads FAQ:
Q: What's the difference between a
thread's start() and run() methods?
A: The separate start() and run() methods in the Thread class provide
two ways to create threaded programs.
The start() method starts the
execution of...
Command to remove all npm modules globally?
...sign. Is there a simpler way to do this? Who actually remembers the code required in the answer?
– Brian Dear
Aug 31 '15 at 11:23
16
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Remove Fragment Page from ViewPager in Android
... this.pages = pages;
}
@Override
public Fragment getItem(int index) {
return pages.get(index);
}
@Override
public int getCount() {
return pages.size();
}
@Override
public int getItemPosition(Object object) {
int index = pages.indexOf (o...
What's the difference between a continuation and a callback?
...e:
var array = [1, 2, 3];
forEach(array, function (element, array, index) {
array[index] = 2 * element;
});
console.log(array);
function forEach(array, callback) {
var length = array.length;
for (var i = 0; i < length; i++)
callback(array[i], array, i);
}
...
Is there a WebSocket client implemented for Python? [closed]
... both participants in a websocket connection can initiate a "close." Don't quote me though. Anyways, I looked at the source code and there is: "dropConnection" and "sendClose" i'd just plug them in and test them :)
– chrisallick
Oct 15 '12 at 20:52
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Remove all classes that begin with a certain string
...
With jQuery, the actual DOM element is at index zero, this should work
$('#a')[0].className = $('#a')[0].className.replace(/\bbg.*?\b/g, '');
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