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size_t vs. uintptr_t
...at size_t is a type that can hold any array index. This means that, logically, size_t should be able to hold any pointer type. I've read on some sites that I found on the Googles that this is legal and/or should always work:
...
How do I convert datetime to ISO 8601 in PHP
... than ISO8601 (the colon is missing in the TZ, ISO8601 expects times to be all with OR all without the colon, not a mixture) - date('c') does produces a strict ISO 8601 valid date - This could cause hard to trace bugs if code expects a strict ISO 8601 datetime format. Ref: en.wikipedia.org/wiki/ISO_...
How to break a line of chained methods in Python?
...ll with the hanging lines indented just once and the trailing paren not at all.
– Carl Meyer
Jun 23 '15 at 21:57
4
...
How to use base class's constructors and assignment operator in C++?
...
You can explicitly call constructors and assignment operators:
class Base {
//...
public:
Base(const Base&) { /*...*/ }
Base& operator=(const Base&) { /*...*/ }
};
class Derived : public Base
{
int additional_;
public:
...
When to use volatile with multi threading?
....
However two threads both accessing a shared variable is something which calls for protection via a mutex isn't it?
But in that case, between the thread locking and releasing the mutex the code is in a critical section where only that one thread can access the variable, in which case the variable ...
Difference between author and committer in Git?
...riginal poster asks:
What is the difference between the two (Committer vs author)?
The author is the person who originally wrote the code. The committer, on the other hand, is assumed to be the person who committed the code on behalf of the original author. This is important in Git because Git...
AES vs Blowfish for file encryption
...was what became AES.
Interesting aside: at one point in the competition, all the entrants were asked to give their opinion of how the ciphers ranked. It's probably no surprise that each team picked its own entry as the best -- but every other team picked Rijndael as the second best.
That said, th...
How to set a Django model field's default value to a function call / callable (e.g., a date relative
... to create a field in the class.
PRE Django 1.7
Django lets you pass a callable as the default, and it will invoke it each time, just as you want:
from datetime import datetime, timedelta
class MyModel(models.Model):
# default to 1 day from now
my_date = models.DateTimeField(default=lambda: ...
wkhtmltopdf: cannot connect to X server
... code.google.com/p/wkhtmltopdf/issues/detail?id=730 seems like vs 11.0_rc1 has some issues
– montrealmike
Mar 28 '13 at 0:05
...
转：postfix安装Q&A - 更多技术 - 清泛网 - 专注C/C++及内核技术
...iles] Error 1
make: *** [Makefiles] Error 2
A:
没装berkeleyDB的开发库，或者是指定路径没有找到，所以报这个错了。如果是linux， 注意看有没有db*-devel的rpm，或者libdb*-dev的deb（debian）如果是bsd，则看看有没有装db3/db4等包
...