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How dangerous is it to compare floating point values?
...t will make sense to compare with an "epsilon", but that epsilon should be based on the magnitude of the numbers you are comparing, not an absolute constant. (In cases where an absolute constant epsilon would work, that's strongly indicative that fixed point, not floating point, is the right tool fo...
How to check if std::map contains a key without doing insert?
... Sure, I understand that the OP doesn't care to insert, so a lower_bound-based solution is overkill. I kind of just mentioned my answer "for completeness"; like I said, yours is perfectly adequate. :-)
– Chris Jester-Young
Oct 7 '10 at 23:29
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Java8: Why is it forbidden to define a default method for a method from java.lang.Object
...single Displayable to implement toString() or extend a DisplayableToString base class.
– Brandon
Jun 10 '14 at 22:07
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Calculate MD5 checksum for a file
...are the results afterwards is up to you; you can convert the byte array to base64 for example, or compare the bytes directly. (Just be aware that arrays don't override Equals. Using base64 is simpler to get right, but slightly less efficient if you're really only interested in comparing the hashes.)...
What is the fastest way to get the value of π?
...nd three had 15, of course this is with doubles, so it might have an error based on its representation and the true calculation could be more accurate.
let pi_2 iters =
let rec loop_ a b t p i =
if i = 0 then a,b,t,p
else
let a_n = (a +. b) /. 2.0
and b_...
Calling C/C++ from Python?
...Also in some systems python header files will be in /usr/include/python2.7 based on the way you have installed it.
From the tutorial:
SWIG is a fairly complete C++ compiler with support for nearly every language feature. This includes preprocessing, pointers, classes, inheritance, and even C++ ...
API Keys vs HTTP Authentication vs OAuth in a RESTful API
...tion as well, that is you need to provide access only to certain resources based on the caller of the API, then use oAuth.
Here's a good description: http://www.srimax.com/index.php/do-you-need-api-keys-api-identity-vs-authorization/
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What is “X-Content-Type-Options=nosniff”?
...
# prevent mime based attacks
Header set X-Content-Type-Options "nosniff"
This header prevents "mime" based attacks. This header prevents Internet Explorer from MIME-sniffing a response away from the declared content-type as the header ins...
PHPMailer character encoding issues
...roblematic with UTF-8 data. To fix this you can do:
$mail->Encoding = 'base64';
Take note that 'quoted-printable' would probably work too in these cases (and maybe even 'binary'). For more details you can read RFC1341 - Content-Transfer-Encoding Header Field.
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What is the 
 character?
...
It's the ASCII/UTF code for LF (0A) - Unix-based systems are using it as the newline character, while Windows uses the CR-LF PAIR (OD0A).
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