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When should we use mutex and when should we use semaphore
... to sleep till you release the mutex.
Spinlock:
Use a spinlock when you really want to use a mutex but your thread is not allowed to sleep.
e.g.: An interrupt handler within OS kernel must never sleep. If it does the system will freeze / crash. If you need to insert a node to globally shared linke...
Resize HTML5 canvas to fit window
How can I automatically scale the HTML5 <canvas> element to fit the page?
15 Answers
...
Spring Java Config: how do you create a prototype-scoped @Bean with runtime arguments?
... its BeanFactory#getBean(String name, Object... args) method which states
Allows for specifying explicit constructor arguments / factory method
arguments, overriding the specified default arguments (if any) in the
bean definition.
Parameters:
args arguments to use if creating a prototype using expl...
Simple proof that GUID is not unique [closed]
...(OutOfMemoryException)
{
// Release the ram we allocated up front.
// Actually, these are pointless too.
//GC.KeepAlive(reserveSomeRam);
//GC.Collect();
}
Console.WriteLine("{0:u} - Built bigHeapOGuid...
Get TransactionScope to work with async / await
...flow across thread continuations.
My understanding is that it is meant to allow you to write code like this:
// transaction scope
using (var scope = new TransactionScope(... ,
TransactionScopeAsyncFlowOption.Enabled))
{
// connection
using (var connection = new SqlConnection(_connectionStrin...
Passing command line arguments from Maven as properties in pom.xml
... </activation>
<properties>
<build_os>linux</build_os>
<build_ws>gtk</build_ws>
<build_arch>x86_64</build_arch>
</properties>
</profile>
<profile>
<id>wi...
Use of the MANIFEST.MF file in Java
...1.0 of the Java Development Kit is the following.
Manifest-Version: 1.0
All the entries are as name-value pairs. The name of a header is separated from its value by a colon. The default manifest shows that it conforms to version 1.0 of the manifest specification.
The manifest can also contain inf...
The new keyword “auto”; When should it be used to declare a variable type? [duplicate]
... v.end(); ++it) //v is some [std] container
{
//..
}
Or, more generally,
//good : auto increases readability here
for(auto it = std::begin(v); it != std::end(v); ++it)//v could be array as well
{
//..
}
But when the type is not very well-known and infrequently used , then I think ...
What is the difference between HTML tags and ?
...k element
span is an inline element.
This means that to use them semantically, divs should be used to wrap sections of a document, while spans should be used to wrap small portions of text, images, etc.
For example:
<div>This a large main division, with <span>a small bit</span>...
What exactly is RESTful programming?
...
An architectural style called REST (Representational State Transfer) advocates that web applications should use HTTP as it was originally envisioned. Lookups should use GET requests. PUT, POST, and DELETE requests should be used for mutation, creati...