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How to update PATH variable permanently from Windows command line?
...and then execute echo %PATH% I see this string added to the PATH. If I close and open the command line, that new string is not in PATH.
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Why is NaN not equal to NaN? [duplicate]
...nction; one of the examples given in the linked document is finding the zeros() of a function f(). It is entirely possible that in the process of probing the function with guess values that you will probe one where the function f() yields no sensible result. This allows zeros() to see the NaN and co...
Why is volatile needed in C?
...
volatile in C actually came into existence for the purpose of not caching the values of the variable automatically. It will tell the compiler not to cache the value of this variable. So it will generate code to take the value of the given volatile variable from the main memory ev...
What is the best way to deal with the NSDateFormatter locale “feechur”?
...Formatter (Locale)
- (id)initWithSafeLocale {
static NSLocale* en_US_POSIX = nil;
self = [self init];
if (en_US_POSIX == nil) {
en_US_POSIX = [[NSLocale alloc] initWithLocaleIdentifier:@"en_US_POSIX"];
}
[self setLocale:en_US_POSIX];
return self;
}
@end
...
GCC -fPIC option
...for Code Generation Conventions , but could not understand what "Generate position-independent code (PIC)" does. Please give an example to explain me what does it mean.
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socket.error: [Errno 48] Address already in use
...the default port (8000). If you already ran the same module before, it is most likely that process still bound to the port. Try and locate the other process first:
$ ps -fA | grep python
501 81651 12648 0 9:53PM ttys000 0:00.16 python -m SimpleHTTPServer
The command arguments are included...
select * vs select column
If I just need 2/3 columns and I query SELECT * instead of providing those columns in select query, is there any performance degradation regarding more/less I/O or memory?
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Comment shortcut Android Studio
...mbo just folds the block of code. Any clue?
– danielrosero
Mar 13 '18 at 22:48
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Difference between static memory allocation and dynamic memory allocation
..., especially if we start considering that the compilation machine and the host machine might not be the same or might not even be on the same architecture.
It may be better to think that the allocation of static memory is handled by the compiler rather than allocated at compile time.
For example...
how to use sed, awk, or gawk to print only what is matched?
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My sed (Mac OS X) didn't work with +. I tried * instead and I added p tag for printing match:
sed -n 's/^.*abc\([0-9]*\)xyz.*$/\1/p' example.txt
For matching at least one numeric character without +, I would use:
sed -n 's/^.*abc\([0...