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Should I be using object literals or constructor functions?
...on () {
return this.x + this.y + this.z;
}
};
var ObjCon = function(_x, _y, _z) {
var x = _x; // private
var y = _y; // private
this.z = _z; // public
this.add = function () {
return x + y + this.z; // note x, y doesn't need this.
};
};
// use the objects:
objLit.x = 3;
objLit...
Assigning a variable NaN in python without numpy
...e 1, in <module>
File "C:\Python35\lib\fractions.py", line 146, in __new__
numerator)
ValueError: Invalid literal for Fraction: 'nan'
>>>
>>> Fraction(float('nan'))
Traceback (most recent call last):
File "<stdin>", line 1, in <module>
File "C:\Python35\...
What new capabilities do user-defined literals add to C++?
...its>
inline constexpr std::bitset<sizeof...(Bits)>
operator"" _bits() noexcept
{
static_assert(checkbits<Bits...>::valid, "invalid digit in binary string");
return std::bitset<sizeof...(Bits)>((char []){Bits..., '\0'});
}
int
main()
{
auto bits = 0101010101010...
What is the single most influential book every programmer should read? [closed]
... For Computer Scientists http://ecx.images-amazon.com/images/I/51HCJ5R42KL._SL500_BO2,204,203,200_AA219_PIsitb-sticker-dp-arrow,TopRight,-24,-23_SH20_OU02_.jpg
Discrete Mathematics For Computer Scientists by J.K. Truss.
While this doesn't teach you programming, it teaches you fundamental mathemati...
How can I link to a specific glibc version?
...clude <limits.h>
#include <stdlib.h>
#include <stdio.h>
__asm__(".symver realpath,realpath@GLIBC_2.2.5");
int main()
{
const char* unresolved = "/lib64";
char resolved[PATH_MAX+1];
if(!realpath(unresolved, resolved))
{ return 1; }
printf("%s\n", resolved)...
super() fails with error: TypeError “argument 1 must be type, not classobj” when parent does not inh
...nk your python version is 2.X, the super would work when adding this code
__metaclass__ = type
so the code is
__metaclass__ = type
class B:
def meth(self, arg):
print arg
class C(B):
def meth(self, arg):
super(C, self).meth(arg)
print C().meth(1)
...
逆向工程——二进制炸弹(CSAPP Project) - 操作系统(内核) - 清泛网 - 专注...
...了一下，差不多几十页的样子，发现其中有六个函数phase_1……phase_6，基本上也就可以确定就是这六个关卡了。
===============phase_1===============
知识点：string，函数调用，栈
用了差不多一个星期断断续续地寻找感觉的phase_1，最...
Bold & Non-Bold Text In A Single UILabel?
...d: 2012/10/14 21:59"
We only need to create the attributed string:
if ([_label respondsToSelector:@selector(setAttributedText:)])
{
// iOS6 and above : Use NSAttributedStrings
// Create the attributes
const CGFloat fontSize = 13;
NSDictionary *attrs = @{
NSFontAttributeNa...
Python ElementTree module: How to ignore the namespace of XML files to locate matching element when
...s ET
# instead of ET.fromstring(xml)
it = ET.iterparse(StringIO(xml))
for _, el in it:
prefix, has_namespace, postfix = el.tag.partition('}')
if has_namespace:
el.tag = postfix # strip all namespaces
root = it.root
This is based on the discussion here:
http://bugs.python.org/issu...
Which $_SERVER variables are safe?
...lue comes from and hence whether it can be trusted for a certain purpose. $_SERVER['HTTP_FOOBAR'] for example is entirely safe to store in a database, but I most certainly wouldn't eval it.
As such, let's divide those values into three categories:
Server controlled
These variables are set by the ...