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What is a mutex?
...ople hoilding the mu.. chicken are competing threads. The Moderator is the OS. When people requests the chicken, they do a lock request. When you call mutex.lock(), your thread stalls in lock() and makes a lock request to the OS. When the OS detects that the mutex was released from a thread, it mere...
What is the difference between user and kernel modes in operating systems?
...mory address. Kernel
mode is generally reserved for the
lowest-level, most trusted functions
of the operating system. Crashes in
kernel mode are catastrophic; they
will halt the entire PC.
User Mode
In User mode, the executing code has no ability to directly access
hardware or ref...
Mongo interface [closed]
...even if you your MongoDB isn't on MongoHQ.)
https://mongohq.com/home
Mac OS X
While MongoHub had been a decent option for a while it's bugs make it virtually unusable at this point ...
There is a more up-to-date (and less buggy) fork of the MongoHub project available: https://github.com/fotonau...
What exactly does stringstream do?
...her numerical types. The usage of stringstream is similar to the usage of iostream, so it is not a burden to learn.
Stringstreams can be used to both read strings and write data into strings. It mainly functions with a string buffer, but without a real I/O channel.
The basic member functions of st...
Lazy Method for Reading Big File in Python?
... answered Feb 6 '09 at 9:20
nosklonosklo
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background function in Python
...
The interpreter stays open until the thread closes. (example import threading, time; wait=lambda: time.sleep(2); t=threading.Thread(target=wait); t.start(); print('end')). I was hoping "background" implied detached as well.
– ThorSummoner
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Get a list of URLs from a site [closed]
... all their old pages to end in 404s. Keeping the old URL structure wasn't possible because it was hideous.
8 Answers
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How do I get a Cron like scheduler in Python? [closed]
...30").do(job)
while 1:
schedule.run_pending()
time.sleep(1)
Disclosure: I'm the author of that library.
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source command not found in sh shell
...urce. On Ubuntu, though, /bin/dash is used which does not support source. Most shells use . instead of source. If you cannot edit the script, try to change the shell which runs it.
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Add up a column of numbers at the Unix shell
...lable on some systems! awk, on the other hand is (I believe) required for POSIX compliance.
– vktec
Jan 1 '17 at 20:23
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