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How is a CRC32 checksum calculated?
...he message.
The reason for this strange procedure is that the first Ethernet implementations would serialize the message one byte at a time and transmit the least significant bit of every byte first. The serial bit stream then went through a serial CRC-32 shift register computation, which was simp...
Is it worthwile to learn assembly language? [closed]
...gh for the really interesting stuff you have to hunt out obsessives on the net.
I think it's useful to understand what happens at the lower levels. As you research assembler you will learn about cpu pipelining, branch prediction, cache alignment, SIMD, instruction reordering and so on. Knowledge of...
How can I get the behavior of GNU's readlink -f on a Mac?
...but within the similar situation, and has still been very helpful. topbug.net/blog/2013/04/14/…
– Pysis
Jun 19 '17 at 13:36
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What is the difference between new/delete and malloc/free?
... @winterlight: That used to be true but no longer. See: linux.die.net/man/3/free If ptr is NULL, no operation is performed.
– Martin York
Jun 19 '16 at 17:12
2
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Setting “checked” for a checkbox with jQuery
...his should be all major browsers, but I am unable to test previous to Internet Explorer 9.
The Problem (jQuery 1.6):
Once a user clicks on a checkbox, that checkbox stops responding to the "checked" attribute changes.
Here is an example of the checkbox attribute failing to do the job after some...
How can I list the contents of a directory in Python?
...
One way:
import os
os.listdir("/home/username/www/")
Another way:
glob.glob("/home/username/www/*")
Examples found here.
The glob.glob method above will not list hidden files.
Since I originally answered this question years ago, pathlib has been added to Python. M...
How can I echo HTML in PHP?
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@MhdSyrwan just random chars, you can read more here php.net/manual/en/…
– lfx
Sep 23 '11 at 18:22
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Determine the number of lines within a text file
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Seriously belated edit: If you're using .NET 4.0 or later
The File class has a new ReadLines method which lazily enumerates lines rather than greedily reading them all into an array like ReadAllLines. So now you can have both efficiency and conciseness with:
var l...
Why does google.load cause my page to go blank?
... add a Google chart. In the process (Greasemonkey injected into page), the www.google.com/jsapi script node is added. After adding this element for Google's jsapi javascript, the injected (or page) script is ready to use the the google.load command (which needs to be loaded in the added node), but t...
Can I extend a class using more than 1 class in PHP?
... have also been ported to Java and C#.
More information: https://wiki.php.net/rfc/traits
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