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What does it mean to start a PHP function with an ampersand?
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An ampersand before a function name means the function will return a reference to a variable instead of the value.
Returning by reference is useful when
you want to use a function to find to
which variable a reference should be
bou...
Angular JS break ForEach
I have an angular foreach loop and i want to break from loop if i match a value. The following code does not work.
21 Answe...
How to edit log message already committed in Subversion?
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Essentially you have to have admin rights (directly or indirectly) to the repository to do this. You can either configure the repository to allow all users to do this, or you can modify the log message directly on the server.
See this part of the Subversion FAQ (emphasis mi...
Why is a ConcurrentModificationException thrown and how to debug it
...n that is being iterated over is modified by anything other than the Iterator itself.
Iterator it = map.entrySet().iterator();
while (it.hasNext())
{
Entry item = it.next();
map.remove(item.getKey());
}
This will throw a ConcurrentModificationException when the it.hasNext() is called the se...
Why does changing 0.1f to 0 slow down performance by 10x?
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Welcome to the world of denormalized floating-point! They can wreak havoc on performance!!!
Denormal (or subnormal) numbers are kind of a hack to get some extra values very close to zero out of the floating point representation. Operations ...
How to find the last field using 'cut'
Without using sed or awk , only cut , how do I get the last field when the number of fields are unknown or change with every line?
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What is the difference between association, aggregation and composition?
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For two objects, Foo and Bar the relationships can be defined
Association - I have a relationship with an object. Foo uses Bar
public class Foo {
void Baz(Bar bar) {
}
};
Composition - I own an object and I am ...
When and how should I use a ThreadLocal variable?
... avoid synchronizing access to that object (I'm looking at you, SimpleDateFormat). Instead, give each thread its own instance of the object.
For example:
public class Foo
{
// SimpleDateFormat is not thread-safe, so give one to each thread
private static final ThreadLocal<SimpleDateFor...
How to get rspec-2 to give the full trace associated with a test failure?
Right now if I run my test suite using rake spec I get an error:
6 Answers
6
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Java OCR implementation [closed]
...there any OCR implementations in pure Java? I'm curious how this would perform purely in Java, and OCR in general interests me, so I'd love to see how it's implemented in a language I thoroughly understand. Naturally, this would require that the implementation is open source, but I'm still intereste...