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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...
Get Folder Size from Windows Command Line
...
You can just add up sizes recursively (the following is a batch file):
@echo off
set size=0
for /r %%x in (folder\*) do set /a size+=%%~zx
echo %size% Bytes
However, this has several problems because cmd is limited to 32-bit signed integer arithmetic. So it will get sizes above 2 G...
Impossible to Install PG gem on my mac with Mavericks
I'm trying to install the pg gem in order to work again with my rails projects. But I get this error:
26 Answers
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Multiprocessing: How to use Pool.map on a function defined in a class?
...rmap(f, X, nprocs=multiprocessing.cpu_count()):
q_in = multiprocessing.Queue(1)
q_out = multiprocessing.Queue()
proc = [multiprocessing.Process(target=fun, args=(f, q_in, q_out))
for _ in range(nprocs)]
for p in proc:
p.daemon = True
p.start()
sent =...
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()...
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...
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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Batch equivalent of Bash backticks
...nternal command to cmd.exe, but it works in the more natural way. Windows batch scripts always surprise me somehow (but not usually in a good way).
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