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Difference between binary semaphore and mutex
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They are NOT the same thing. They are used for different purposes!
While both types of semaphores have a full/empty state and use the same API, their usage is very different.
Mutual Exclusion Semaphores
Mutual Exclusion semaphores are used to protect shared resources (data structure...
Project structure for Google App Engine
...tandard project layout on page 10 of his slide presentation.
Here I'll post a slightly modified version of the layout/structure from that page. I pretty much follow this pattern myself. You also mentioned you had trouble with packages. Just make sure each of your sub folders has an __init__.py fi...
Microsecond timing in JavaScript
Are there any timing functions in JavaScript with microsecond resolution?
4 Answers
4
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Can two applications listen to the same port?
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The answer differs depending on what OS is being considered. In general though:
For TCP, no. You can only have one application listening on the same port at one time. Now if you had 2 network cards, you could have one application listen on the first IP and the ...
Why and not taking font-family and font-size from body?
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By default, browsers render most form elements (textareas, text boxes, buttons, etc) using OS controls or browser controls. So most of the font properties are taken from the theme the OS is currently using.
You'll have to target the form elements themse...
Python Requests and persistent sessions
...ests.Session()
After that, continue with your requests as you would:
s.post('https://localhost/login.py', login_data)
#logged in! cookies saved for future requests.
r2 = s.get('https://localhost/profile_data.json', ...)
#cookies sent automatically!
#do whatever, s will keep your cookies intact :)...
Linux/Unix command to determine if process is running?
I need a platform independent (Linux/Unix|OSX) shell/bash command that will determine if a specific process is running. e.g. mysqld , httpd ...
What is the simplest way/command to do this?
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what happens when you type in a URL in browser [closed]
...is is an extremely rough and oversimplified sketch, assuming the simplest possible HTTP request (no HTTPS, no HTTP2, no extras), simplest possible DNS, no proxies, single-stack IPv4, one HTTP request only, a simple HTTP server on the other end, and no problems in any step. This is, for most contempo...
Is gettimeofday() guaranteed to be of microsecond resolution?
...that was originally written for the Win32 API, to Linux (well, porting the OS X port of the Win32 port to Linux).
10 Answer...
How do I correctly clean up a Python object?
...esources that need to be cleaned up. The problem with using an explicit close() statement is that you have to worry about people forgetting to call it at all or forgetting to place it in a finally block to prevent a resource leak when an exception occurs.
To use the with statement, create a class ...