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Loop through an array in JavaScript
... lot of problems, for example, if you extend the Array.prototype object to include a method there, that property will also be enumerated.
For example:
Array.prototype.foo = "foo!";
var array = ['a', 'b', 'c'];
for (var i in array) {
console.log(array[i]);
}
The above code will console...
Preserve HTML font-size when iPhone orientation changes from portrait to landscape
...
You could also opt for using a CSS reset, such as normalize.css, which includes the same rule that crazygringo recommends:
/**
* 2. Prevent iOS text size adjust after orientation change, without disabling
* user zoom.
*/
html {
-ms-text-size-adjust: 100%;
-webkit-text-size-adjust: 10...
Setup RSpec to test a gem (not Rails)
...spec, and you need to tell it where your app is, where your files are, and include the file you want to test (along with any dependencies it has):
# spec/awesome_gem/awesome.rb
APP_ROOT = File.expand_path(File.join(File.dirname(__FILE__), '..', '..'))
$: << File.join(APP_ROOT, 'lib/awesome_ge...
What is the largest Safe UDP Packet Size on the Internet
...der is 20 bytes, and the UDP header is 8 bytes. However it is possible to include IP options which can increase the size of the IP header to as much as 60 bytes. In addition, sometimes it is necessary for intermediate nodes to encapsulate datagrams inside of another protocol such as IPsec (used fo...
How can “while (i == i) ;” be a non-infinite loop in a single threaded application?
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double i = Double.NaN;
NaN is not equal to anything, including itself.
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Foreign Key naming scheme
... to be in, and not one you'd typically design in from scratch, so I didn't include this in the response.
– Greg Beech
Oct 14 '08 at 0:41
4
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How do I run a Python program?
... |Environmental Variables| > system variables -> Path
this needs to include: C:\Python26; (or equivalent). If you put it at the front,
it will be the first place looked. You can also add it at the end, which is possibly saner.
Then restart your prompt, and try typing 'python'. If it all ...
What does the Q_OBJECT macro do? Why do all Qt objects need this macro?
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The MOC (meta object compiler) converts the Q_OBJECT macro included header files in to C++ equivalent source code.
It basically controls the signal-slot mechanism, and makes it understandable to the C++ compiler
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dd: How to calculate optimal blocksize? [closed]
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The optimal block size depends on various factors, including the operating system (and its version), and the various hardware buses and disks involved. Several Unix-like systems (including Linux and at least some flavors of BSD) define the st_blksize member in the struct stat...
Create two blank lines in Markdown
...single equation-white-space. The benefit is that in Markdown flavours that include both PDF and HTML output options (including Rmarkdown), it should be understood in the same way for both output types, whereas I'm not sure how PDF output would interpret <br> or &nbsp;
...