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Are loops really faster in reverse?
...th each time you increment i, when you check if i <= array.length.
In most cases you shouldn't even worry about this kind of optimization.
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Why is address zero used for the null pointer?
...t as usable by the platform as an address - the C standard simply had to chose something to use to indicate a null pointer, and zero was chosen. I'm honestly not sure if other sentinel values were considered.
The only requirements for a null pointer are:
it's guaranteed to compare unequal to a ...
Enable access control on simple HTTP server
...ers it sends. You can however create a simple HTTP server yourself, using most of SimpleHTTPRequestHandler, and just add that desired header.
For that, simply create a file simple-cors-http-server.py (or whatever) and, depending on the Python version you are using, put one of the following codes in...
What is the significance of 1/1/1753 in SQL Server?
...de from the Julian calendar. September 3, 1752 to September 13, 1752 were lost.
Kalen Delaney explained the choice this way
So, with 12 days lost, how can you
compute dates? For example, how can
you compute the number of days between
October 12, 1492, and July 4, 1776? Do
you include th...
memcpy() vs memmove()
...in to avoid corrupting the data. These implementations are rather simple. Most high-performance implementations are more complicated (involving copying word-size blocks at a time rather than bytes).
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Inline functions vs Preprocessor macros
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Preprocessor macros are just substitution patterns applied to your code. They can be used almost anywhere in your code because they are replaced with their expansions before any compilation starts.
Inline functions are actual functions whose...
Node.js and CPU intensive requests
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@pacerier, why you say that? What do you propose?
– luis.espinal
Jun 21 '17 at 9:59
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Heroku 'Permission denied (publickey) fatal: Could not read from remote repository' woes
... the key and just needed to add the key to heroku
– joseramonc
Dec 3 '14 at 16:19
4
The first one...
How do you get the list of targets in a makefile?
...t command to extract the target names, which hopefully prevents any false positives (and also does away with the unnecessary sh -c)
does not invariably target the makefile in the current directory; respects makefiles explicitly specified with -f <file>
excludes hidden targets - by convention, ...
How can I programmatically get the MAC address of an iphone
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NOTE As of iOS7, you can no longer retrieve device MAC addresses. A fixed value will be returned rather than the actual MAC
Somthing I stumbled across a while ago. Originally from here I modified it a bit and cleaned things up.
IPA...
