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What is the difference between NaN and None?
...
109
NaN is used as a placeholder for missing data consistently in pandas, consistency is good. I u...
Why is “while ( !feof (file) )” always wrong?
... want to test that it represents an integer in its entirety, with no extra bits at the end except whitespace. Using C++ iostreams, it goes like this:
std::string input = " 123 "; // example
std::istringstream iss(input);
int value;
if (iss >> value >> std::ws && is...
Will Emacs make me a better programmer? [closed]
...
He (Steve Yegge) has elaborated on this, in bits in pieces, in other postings of his. http://steve-yegge.blogspot.com/2008_04_01_archive.html is probably the most comprehensive, but the info is buried in there since it's on a tangent to the main subject.
I guess to su...
Assignment in an if statement
... of overloads) a while ago and I called them AsEither(...), I think it's a bit clearer than AsIf(...), so I can write myAnimal.AsEither(dog => dog.Woof(), cat => cat.Meeow(), unicorn => unicorn.ShitRainbows()).
– herzmeister
Aug 18 '11 at 21:37
...
Make var_dump look pretty
...et same -> display_errors = On
Check html_errors in same file a little bit below, it's also must be On
Save and exit
After open /etc/php/7.0/fpm/conf.d/20-xdebug.ini
And add to the end:
```
xdebug.cli_color=1
```
Save and exit.
A lot other available option and documentation for xdebug can b...
Passing variables in remote ssh command
...=$BUILD_NUMBER ~/tools/run_pvt.pl \$BUILD_NUMBER"
In this case this is a bit of an overkill, and note
env BUILD_NUMBER=$BUILD_NUMBER does the meta expansion on the local
host
the remote BUILD_NUMBER environment variable will be used by
the remote shell
...
Get local IP address in node.js
...now doesn't work on windows. Running programs to parse the results seems a bit iffy. Here's what I use.
require('dns').lookup(require('os').hostname(), function (err, add, fam) {
console.log('addr: '+add);
})
This should return your first network interface local ip.
...
Wait until file is unlocked in .NET
...t, and the wait time between retries.
NOTE: Unfortunately, the underlying Win32 error (ERROR_SHARING_VIOLATION) is not exposed with .NET, so I have added a small hack function (IsSharingViolation) based on reflection mechanisms to check this.
/// <summary>
/// Wraps sharing violation...
Python syntax for “if a or b or c but not all of them”
...
All great answers, but this wins for conciseness, with great short-circuiting. Thanks all!
– Chris Wilson
May 13 '13 at 12:46
38
...
Can you call Directory.GetFiles() with multiple filters?
... Directory.EnumerateFiles(path, x)
);
}
It gets a bit faster if you don't have to turn them into globs (i.e. exts = new[] {"*.mp3", "*.jpg"} already).
Performance evaluation based on the following LinqPad test (note: Perf just repeats the delegate 10000 times)
https://gist....