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Custom ImageView with drop shadow
...
This is taken from Romain Guy's presentation at Devoxx, pdf found here.
Paint mShadow = new Paint();
// radius=10, y-offset=2, color=black
mShadow.setShadowLayer(10.0f, 0.0f, 2.0f, 0xFF000000);
// in onDraw(Canvas)
canvas.drawBitmap(b...
C char array initialization
...specify it:
char buf = '\0';
The backslash is necessary to disambiguate from character '0'.
char buf = 0;
accomplishes the same thing, but the former is a tad less ambiguous to read, I think.
Secondly, you cannot initialize arrays after they have been defined.
char buf[10];
declares and...
How do I verify jQuery AJAX events with Jasmine?
... request, and just afterwards. You can even use Jasmine to fake a response from the server. These tests would be faster - and they would not need to handle asynchronous behaviour - since there isn't any real AJAX going on.
Integration tests that perform real AJAX requests. These would need to be asy...
converting double to integer in java
...nding, there will not be any fractional parts remaining.
Here are the docs from Math.round(double):
Returns the closest long to the argument. The result is rounded to an integer by adding 1/2, taking the floor of the result, and casting the result to type long. In other words, the result is equal t...
Haskell: Lists, Arrays, Vectors, Sequences
...nce list. The best example of lists screwing up performance tends to come from [Char] which the prelude has aliased as String. Char lists are convient, but tend to run on the order of 20 times slower than C strings, so feel free to use Data.Text or the very fast Data.ByteString. I'm sure there ar...
Exit a Script On Error
...ands' error codes cause an automatic exit. Furthermore, "the rules change from one Bash version to another, as Bash attempts to track the extremely slippery POSIX definition of this 'feature'". I agree with @Dennis Williamson and the accepted answer of stackoverflow.com/questions/19622198/… - us...
Is the order of elements in a JSON list preserved?
...
Yes, the order of elements in JSON arrays is preserved. From RFC 7159 -The JavaScript Object Notation (JSON) Data Interchange Format
(emphasis mine):
An object is an unordered collection of zero or more name/value
pairs, where a name is a string and a value is a string, num...
jQuery Plugin: Adding Callback functionality
...e options object:
$.fn.myPlugin = function() {
// extend the options from pre-defined values:
var options = $.extend({
callback: function() {}
}, arguments[0] || {});
// call the callback and apply the scope:
options.callback.call(this);
};
Use it like this:
$('.el...
What do hjust and vjust do when making a plot using ggplot?
...the case of angle=45, when I have axis labels of varying length, let's say from 25 to 5 characters, they're neither aligned justified to the right or the left of the word boundaries. Take a look at the axes here If I were to use angle=45, how would I make them right-justified and flush against the a...
Does C++ support 'finally' blocks? (And what's this 'RAII' I keep hearing about?)
...quired because of RAII.
RAII moves the responsibility of exception safety from the user of the object to the designer (and implementer) of the object. I would argue this is the correct place as you then only need to get exception safety correct once (in the design/implementation). By using finally ...