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What is the difference between a URI, a URL and a URN?
...
From RFC 3986:
A URI can be further classified as a locator, a name, or both. The
term "Uniform Resource Locator" (URL) refers to the subset of URIs
that, in addition to identifying a resource, provide a means ...
What does inverse_of do? What SQL does it generate?
...
From the documentation, it seems like the :inverse_of option is a method for avoiding SQL queries, not generating them. It's a hint to ActiveRecord to use already loaded data instead of fetching it again through a relationshi...
Pull all commits from a branch, push specified commits to another
...think you're looking for is a 'cherry pick'. That is, take a single commit from the middle of one branch and add it to another:
A-----B------C
\
\
D
becomes
A-----B------C
\
\
D-----C'
This, of course, can be done with the git cherry-pick command.
The problem with this commit is t...
Python try-else
...do if the first operation succeeds, and you don't want to catch an IOError from that operation, you might write something like this:
try:
operation_that_can_throw_ioerror()
except IOError:
handle_the_exception_somehow()
else:
# we don't want to catch the IOError if it's raised
anoth...
Gzip versus minify
...are the results of a test I did a while back, using a "real life" CSS file from my website. CSS Optimiser is used for minification. The standard Linux archive app that comes with Ubuntu was used for Gzipping.
Original: 28,781 bytes
Minified: 22,242 bytes
Gzipped: 6,969 bytes
Min+Gzip: 5,990 bytes
...
How to create a custom-shaped bitmap marker with Android map API v2 [duplicate]
...")
.snippet("Population: 4,627,300")
.icon(BitmapDescriptorFactory.fromResource(R.drawable.arrow)));
As this just replaces the marker with an image you might want to use a Canvas to draw more complex and fancier stuff:
Bitmap.Config conf = Bitmap.Config.ARGB_8888;
Bitmap bmp = Bitmap.crea...
Unsafe JavaScript attempt to access frame with URL
...m getting the below error when i try to set a hash value to the parent url from iframe which contains another domain url:
6...
Why does the indexing start with zero in 'C'?
...and so the expression array[n] refers to a memory location n elements away from the starting element. This means that the index is used as an offset. The first element of the array is exactly contained in the memory location that array refers (0 elements away), so it should be denoted as array[0].
F...
Convert UTC/GMT time to local time
...27:30.000, DateTime.Parse cannot tell what time zone the date and time are from.
DateTime has a Kind property, which can have one of three time zone options:
Unspecified
Local
Utc
NOTE If you are wishing to represent a date/time other than UTC or your local time zone, then you should use DateTi...
How to get a path to a resource in a Java JAR file
...m("/com/myorg/foo.jpg"));
When you really have to load a (non-image) file from a JAR archive, you might try this:
File file = null;
String resource = "/com/myorg/foo.xml";
URL res = getClass().getResource(resource);
if (res.getProtocol().equals("jar")) {
try {
InputStream input = getCla...