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What is the function of the push / pop instructions used on registers in x86 assembly?
When reading about assembler I often come across people writing that they push a certain register of the processor and pop it again later to restore it's previous state.
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Undefined, unspecified and implementation-defined behavior
...tput yellow" or "What do you mean undefined, string literals are stored in read-only memory, so the first assignment attempt results in a core dump". This is exactly the problem with undefined behavior. Basically, the standard allows anything to happen once you invoke undefined behavior (even nasal ...
Comparing HTTP and FTP for transferring files
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@Trisped did you read the performance comparison link? There are 12 references to FTP and the very first section says "The HTTP protocol was originally developed to reduce the inefficiencies of the FTP..." and then goes on to explain. I also...
Why does my 'git branch' have no master?
I'm a git newbie and I keep reading about a "master" branch. Is "master" just a conventional name that people used or does it have special meaning like HEAD ?
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Do login forms need tokens against CSRF attacks?
...videos the victim was watching.
There's some discussion in this comment thread that implies it could "only" be used for privacy violations like that. Perhaps, but to quote the section in Wikipedia's CSRF article:
Login CSRF makes various novel attacks possible; for instance, an
attacker can l...
How do I make an http request using cookies on Android?
...apache library or with HTTPUrlConnection. Either way you should be able to read and set HTTP cookies in this fashion.
You can read this article for more information.
I can share my peace of code to demonstrate how easy you can make it.
public static String getServerResponseByHttpGet(String url, ...
sed or awk: delete n lines following a pattern
...commands: {n;N;N;N;N;d}, which basically prints the next line (n) and then reads and finally discards the next 4 lines (N;N;N;N;d).
– pimlottc
Oct 2 '13 at 1:38
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How to run multiple shells on Emacs
...gument. It's a way of injecting an argument into the next command. You can read more about it with C-h k C-u (C-h k runs describe-key, very handy!)
– Matt Curtis
Sep 28 '14 at 1:35
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Given a class, see if instance has method (Ruby)
...s ONLY methods that you defined explicitly with:
def my_method
end
then read this:
In Ruby, a property (attribute) on your model is basically a method also. So method_defined? will also return true for properties, not just methods.
For example:
Given an instance of a class that has a String at...
Will strlen be calculated multiple times if used in a loop condition?
...is only true if ss is not changed in for loop.
For example, if you use a read-only function on ss in for loop but don't declare the ss-parameter as const, the compiler cannot even know that ss is not changed in the loop and has to calculate strlen(ss) in every iteration.
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