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Resizing an image in an HTML5 canvas
...hem to speed it up, but I was having trouble figuring out how to make this into a multithreaded algorithm
– Telanor
Jul 11 '10 at 22:52
3
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Enterprise app deployment doesn't work on iOS 7.1
...karep/easycert/issues and if possible posting all the commands you used to convert all the files as needed.
– Ralph Caraveo
Apr 11 '14 at 16:31
1
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CSS: bolding some text without changing its container's size
...d, more importantly, this does not work when fonts are scaled, even if you convert the 1px to relative values like 0.025ex or 0.0125ex. See my answer for a live demonstration.
– Adam Katz
Nov 3 '17 at 17:05
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SQLAlchemy: Creating vs. Reusing a Session
...ith an open SQLAlchemy session.
"""
engine = create_engine(db_url, convert_unicode=True)
connection = engine.connect()
db_session = scoped_session(sessionmaker(autocommit=False, autoflush=True, bind=engine))
yield db_session
db_session.close()
connection.close()
Usage:
...
Why are these constructs using pre and post-increment undefined behavior?
...n the semantics, instead of i.e. requiring that all implementations handle integer overflow in the exact same way, which would very likely impose serious performance costs, they just left the behavior undefined so that if you write code that causes integer overflow, anything can happen.
So, with th...
Why would iterating over a List be faster than indexing through it?
...
In a linked list, each element has a pointer to the next element:
head -> item1 -> item2 -> item3 -> etc.
To access item3, you can see clearly that you need to walk from the head through every node until you reach item3, since you cannot jump direct...
PHP_SELF vs PATH_INFO vs SCRIPT_NAME vs REQUEST_URI
...SELF into SCRIPT_FILENAME + PATH_INFO
Server performs alias resolution and converts the entire url path to a system file path to get SCRIPT_FILENAME
Resulting script file may include others, where __FILE__ refers to the path to the current file
...
To underscore or to not to underscore, that is the question
...PORTANT UPDATE (April 12, 2016):
It was brought to our attention that the internal standard of the .NET CoreFX team insists on using the underscore-notation without giving any insights as to why. However if we look closely at rule #3 it becomes evident that there is a system of _, t_, s_ prefixes t...
performSelector may cause a leak because its selector is unknown
...
What's going on here is you're asking the controller for the C function pointer for the method corresponding to the controller. All NSObjects respond to methodForSelector:, but you can also use class_getMethodImplementation in the Objective-C runtime (useful if you only have a protocol reference, l...
Good example of livelock?
... = d; }
public synchronized void use() {
System.out.printf("%s has eaten!", owner.name);
}
}
static class Diner {
private String name;
private boolean isHungry;
public Diner(String n) { name = n; isHungry = true; }
public...