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Why do pthreads’ condition variable functions require a mutex?
...ied:
while(1)
{
pthread_mutex_lock(&work_mutex);
while (work_queue_empty()) // wait for work
pthread_cond_wait(&work_cv, &work_mutex);
work = get_work_from_queue(); // get work
pthread_mutex_unlock(&work_mutex);
do_work(work); ...
How does a Breadth-First Search work when looking for Shortest Path?
...er the predecessor through which that path has been acquired. When the BFS queue is empty, pick a node (in your example, it's E) and traverse its predecessors back to the origin. This would give you the shortest path.
If this sounds a bit confusing, wikipedia has a nice pseudocode section on the to...
java: run a function after a specific number of seconds
...un() {
// your code here
}
},
5000
);
EDIT:
javadoc says:
After the last live reference to a Timer object goes away and all outstanding tasks have completed execution, the timer's task execution thread terminates gracefully (and becomes subject to...
How to reload page every 5 seconds?
... setTimeout like:
setTimeout(function(){
window.location.reload(1);
}, 5000);
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Can someone explain how to implement the jQuery File Upload plugin?
...d').fileupload({
// This function is called when a file is added to the queue
add: function (e, data) {
//This area will contain file list and progress information.
var tpl = $('<li class="working">'+
'<input type="text" value="0" data-width="48" data-height="48...
Multiple commands on a single line in a Windows batch file
...om%2fquestions%2f8922224%2fmultiple-commands-on-a-single-line-in-a-windows-batch-file%23new-answer', 'question_page');
}
);
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How do I get the “id” after INSERT into MySQL database with Python?
...
password='pass')
cursor = cnx.cursor()
update_batch = """insert into batch set type = "%s" , records = %i, started = NOW(); """
second_query = (update_batch % ( "Batch 1", 22 ))
cursor.execute(second_query)
cnx.commit()
batch_id = cursor.execute('select last_insert_id()...
Negative weights using Dijkstra's Algorithm
...he alternative stop criterion, which stops the algorithm when the priority-queue (heap) runs empty (this stop criterion was also used in the question), then dijkstra will find the correct distance even for graphs with negative weights but without negative cycles.
However, in this case, the asympto...
How to skip “are you sure Y/N” when deleting files in batch files
...fquestions%2f7160342%2fhow-to-skip-are-you-sure-y-n-when-deleting-files-in-batch-files%23new-answer', 'question_page');
}
);
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How to make an HTTP request + basic auth in Swift
...f below methods
//1 URL request with NSURLConnectionDataDelegate
let queue:NSOperationQueue = NSOperationQueue()
let urlConnection = NSURLConnection(request: request, delegate: self)
urlConnection.start()
//2 URL Request with AsynchronousRequest
NSURLConnection.sendAsynchronous...