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Is JavaScript guaranteed to be single-threaded?
...g the question of whether browsers really implement their JS engines using one OS-thread, or whether other limited threads-of-execution are introduced by WebWorkers.)
However, in reality this isn't quite true, in sneaky nasty ways.
The most common case is immediate events. Browsers will fire these...
How to color System.out.println output? [duplicate]
...2-qa-1220-console.html
Edit: of course there are newer articles than that one I posted, the information is still viable though.
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Interface vs Base class
... for inheritance.
Consequently, because you can usually only inherit from one abstract class (in most statically typed OO languages that is... exceptions include C++) but be able to implement multiple interfaces, it allows you to construct objects in a strictly as required basis.
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Design Pattern for Undo Engine
...ting a structural modeling tool for a civil enginering application. I have one huge model class representing the entire building, which include collections of nodes, line elements, loads, etc. which are also custom classes.
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What are the differences in die() and exit() in PHP?
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aliases allows programmers to use the one which is comfortable with. I remember exit better than die. Some others remember die better than exit.
– mauris
Nov 25 '09 at 6:35
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How to convert a PNG image to a SVG? [closed]
...e.svg" # PNM to SVG
rm "$File.pnm" # Remove PNM
One-line command
If you want to convert many files, you can also use the following one-line command:
( set -x ; for f_png in *.png ; do f="${f_png%.png}" ; convert "$f_png" "$f.pnm" && potrace "$f.pnm" -s -o "$f.svg...
Closing JDBC Connections in Pool
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When using Connection Pool, should one close the Connection at the end? If so, isn't the purpose of pooling lost? And if not, how does the DataSource know when a particular instance of Connection is freed up and can be reused? I am a little confused on this on...
Foreign Key naming scheme
... involved in the key, so it makes it easy to see which tables a particular one (the first one named) depends on (the second one named). In this scenario the complete set of keys would be:
FK_task_user
FK_note_task
FK_note_user
So you can see that tasks depend on users, and notes depend on both ta...
Remove spaces from std::string in C++
...space), str.end());
We should also note that remove_if will make at most one copy of the data. Here is a sample implementation:
template<typename T, typename P>
T remove_if(T beg, T end, P pred)
{
T dest = beg;
for (T itr = beg;itr != end; ++itr)
if (!pred(*itr))
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Objective-C pass block as parameter
...red the same way function pointer types are, but replacing the * with a ^. One way to pass a block to a method is as follows:
- (void)iterateWidgets:(void (^)(id, int))iteratorBlock;
But as you can see, that's messy. You can instead use a typedef to make block types cleaner:
typedef void (^ Iter...