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Client-server synchronization pattern / algorithm?
...because of a bug. In this case, the client needs to get the current state from the server without going through the deltas. This is a copy from master to detail, deltas and performance be damned. It's a one-time thing; the client is broken; don't try to optimize this, just implement a reliable co...
Why is address zero used for the null pointer?
...memory address zero was special and had hardware protection against access from running software (in some cases it was the start of the reset vector, and modifying it could prevent the CPU from resetting or starting up). Programmers used this hardware protection as a form of error detection in thei...
Is the size of C “int” 2 bytes or 4 bytes?
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sizeof(int) can be any value from 1. A byte is not required to be 8 bits and some machines don't have a 8 bit addressable unit (which basically is the definition of a byte in the standard). The answer is not correct without further information.
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scp with port number specified
I'm trying to scp a file from a remote server to my local machine. Only port 80 is accessible.
11 Answers
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How do I check if a given string is a legal/valid file name under Windows?
...e [a-zA-Z0-9_]+ but it doesn't include many national-specific characters from various languages (e.g. umlauts and so on). What is the best way to do such a check?
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How to return multiple lines JSX in another return statement in React?
...menu code into a single component "anchored" at ul than to shoehorn in lis from multiple sources. I think it made also the mental model for the UI a little cleaner.
– ruffin
Mar 24 '17 at 17:43
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Why does the 260 character path length limit exist in Windows?
...null] = 260. One could assume that 256 is a reasonable fixed string length from the DOS days. And going back to the DOS APIs we realize that the system tracked the current path per drive, and we have 26 (32 with symbols) maximum drives (and current directories).
The INT 0x21 AH=0x47 says “This fu...
Correct format specifier to print pointer or address?
...epresentation of a char * address for a given memory location is different from the 'anything else pointer' address for the same memory location. This would be a word-addressed, instead of byte-addressed, machine. Such machines are not common (probably not available) these days, but the first mach...
How do I disable the security certificate check in Python requests
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From the documentation:
requests can also ignore verifying the SSL certificate if you set
verify to False.
>>> requests.get('https://kennethreitz.com', verify=False)
<Response [200]>
If you're using a...
Python Empty Generator Function
... Python 3.3 and above (as suggested by DSM), this:
def empty():
yield from ()
The presence of the yield keyword makes it clear at the briefest glance that this is just another generator function, exactly like all the others. It takes a bit more time to see that the iter(()) version is doing t...