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One-liner to recursively list directories in Ruby?
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Thanks @x-yuri! The flag btw is specified like this: Dir.glob("**/*", File::FNM_DOTMATCH)
– vlz
Nov 5 '14 at 11:50
2
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How to write DataFrame to postgres table?
...s 0.14 (released end of May 2014), postgresql is supported. The sql module now uses sqlalchemy to support different database flavors. You can pass a sqlalchemy engine for a postgresql database (see docs). E.g.:
from sqlalchemy import create_engine
engine = create_engine('postgresql://scott:tiger@lo...
Store a closure as a variable in Swift
...e realized with an optional:
var completionHandler: ((Float)->Void)?
Now the property is automatically initialized to nil ("no value").
In Swift you would use optional binding to check of a the
completion handler has a value
if let handler = completionHandler {
handler(result)
}
or opti...
PHP Session Fixation / Hijacking
...nt these problems. I've been reading the following two articles on Chris Shiflett's website:
5 Answers
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Replace console output in Python
I'm wondering how I could create one of those nifty console counters in Python as in certain C/C++-programs.
10 Answers
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How to delete a character from a string using Python
...te a new string. You have a few options of how to create the new string. If you want to remove the 'M' wherever it appears:
newstr = oldstr.replace("M", "")
If you want to remove the central character:
midlen = len(oldstr)/2 # //2 in python 3
newstr = oldstr[:midlen] + oldstr[midlen+1:]
Yo...
Add list to set?
...t each individual element every time you perform these operations. The specific algorithms used are explained in the Wikipedia article. Pythons hashing algorithms are explained on effbot.org and pythons __hash__ function in the python reference.
Some facts:
Set elements as well as dictionary keys...
Colon (:) in Python list index [duplicate]
...[len(a):] - This gets you the length of a to the end. It selects a range. If you reverse a[:len(a)] it will get you the beginning to whatever is len(a).
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Python - Count elements in list [duplicate]
...tal number of objects in a nested list (including multidimensional lists). If you have numpy, use size(). Otherwise use list comprehensions within recursion.
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ATL CComPtr和CComQIPtr详解 - C/C++ - 清泛网 - 专注IT技能提升
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void Func(IUnknown * punk)
{
CComQIPtr<IXXX> pno(punk);
if(pno)
{
//正确转换
pno->doSomething();
}
}
(2) 赋值
赋值的时候，发生下面三件事：
如果当前指针不为空，那么释放当前指针
如果源指针不为空，那...