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How to automatically crop and center an image
...you need to know about the image is whether it is portrait or landscape in order to set the .portrait class so I had to use a bit of Javascript for this part.
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classical inheritance vs prototypal inheritance in javascript
...eritance. The confusing new operator and .prototype attribute are there in order to make the prototypal inheritance look like (pseudo-)classical inheritance.
Douglas Crockford explores this at length in his book, "JavaScript: The Good Parts".
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Rotated elements in CSS that affect their parent's height correctly
...phs for easier visualiation: */
background: pink;
margin: 1px 0;
border: 1px solid black;
}
.rotation-wrapper-outer {
display: table;
}
.rotation-wrapper-inner {
padding: 50% 0;
height: 0;
}
.element-to-rotate {
display: block;
transform-origin: top left;
/* Note: fo...
How to generate keyboard events in Python?
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def AltTab():
"""Press Alt+Tab and hold Alt key for 2 seconds
in order to see the overlay.
"""
PressKey(VK_MENU) # Alt
PressKey(VK_TAB) # Tab
ReleaseKey(VK_TAB) # Tab~
time.sleep(2)
ReleaseKey(VK_MENU) # Alt~
if __name__ == "__main__":
AltTab()
hexKeyCo...
What is the difference between SAX and DOM?
...and "event-based" refers to the parsing method.
Maybe a small recap is in order:
The document object model (DOM) is an abstract data model that describes a hierarchical, tree-based document structure; a document tree consists of nodes, namely element, attribute and text nodes (and some others). N...
Creating a singleton in Python
...y classes at DEBUG level. I need command line options parsed at startup in order to set the user-specified logging level before those classes are instantiated. Module-level instantiations make that problematic. It's possible that I could carefully structure the app so that all of those classes don't...
How to flip background image using CSS?
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Highly active question. Earn 10 reputation in order to answer this question. The reputation requirement helps protect this question from spam and non-answer activity.
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What does “Could not find or load main class” mean?
...nteracting parts. Many of these parts adopt various caching strategies in order to make the IDE as a whole responsive. These can sometimes go wrong, and one possible symptom is problems when launching applications. If you suspect this could be happening, it is worth trying other things like resta...
What is the most effective way for float and double comparison?
...loating point numbers for depends on the context. Since even changing the order of operations can produce different results, it is important to know how "equal" you want the numbers to be.
Comparing floating point numbers by Bruce Dawson is a good place to start when looking at floating point comp...
What's the best way to unit test protected & private methods in Ruby?
...de, or the given
block, within the context of the receiver (obj). In order to set
the context, the variable self is set to obj while the code is
executing, giving the code access to obj's instance variables. In
the version of instance_eval that takes a String, the optional
...