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How to implement a binary tree?
... self._add(val, self.root)
def _add(self, val, node):
if val < node.v:
if node.l is not None:
self._add(val, node.l)
else:
node.l = Node(val)
else:
if node.r is not None:
self._add(val, node.r...
The server committed a protocol violation. Section=ResponseStatusLine ERROR
...
Try putting this in your app/web.config:
<system.net>
<settings>
<httpWebRequest useUnsafeHeaderParsing="true" />
</settings>
</system.net>
If this doesn't work you may also try setting the KeepAlive property to false.
...
Sort hash by key, return hash in Ruby
...
@zachaysan but it does work: h.sort{|a,z|a<=>z}.to_h (tested 2.1.10, 2.3.3)
– whitehat101
Dec 2 '16 at 6:27
...
Is cout synchronized/thread-safe?
...-safe, what do you think will happen in this code?
// in one thread
cout << "The operation took " << result << " seconds.";
// in another thread
cout << "Hello world! Hello " << name << "!";
You probably want each line here to act in mutual exclusion. But how ...
Guaranteed lifetime of temporary in C++?
...
I wrote almost exactly the same class:
template <class C>
class _StringBuffer
{
typename std::basic_string<C> &m_str;
typename std::vector<C> m_buffer;
public:
_StringBuffer(std::basic_string<C> &str, size_t nSize)
: m_st...
MySQL stored procedure vs function, which would I use when?
...
@Pacerier means functions in MySQL are something like scripts those compiles and executes on the fly. I copied it from some blog post, but didn't perform any practical to inspect this behaviors.
– Grijesh Chauhan
Jan 29 '15 at 7:10
...
Dynamically select data frame columns using $ and a character value
...ou want to extract only a single column as a vector).
For example,
var <- "mpg"
#Doesn't work
mtcars$var
#These both work, but note that what they return is different
# the first is a vector, the second is a data.frame
mtcars[[var]]
mtcars[var]
You can perform the ordering without loops, usi...
Android Studio - debug keystore
...ol command: keytool -exportcert -alias androiddebugkey -keystore C:\Users\<User>\.android\debug.keystore -list -v
– Simon
Dec 16 '14 at 9:49
12
...
How do I edit an incorrect commit message in git ( that I've pushed )?
...aster:master, the + sign forcing the push to occur, even if it doesn't result in a "fast-forward" commit)... you might get into some trouble.
Extract from this other SO question:
I actually once pushed with --force to git.git repository and got scolded by Linus BIG TIME. It will create a lot of...
How to check if an email address exists without sending an email?
... user
You can issue a RCPT, and see if the mail is rejected.
MAIL FROM:<>
RCPT TO:<user@domain>
If the user doesn't exist, you'll get a 5.1.1 DSN. However, just because the email is not rejected, does not mean the user exists. Some server will silently discard requests like this to...