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Get difference between two lists
...ng solutions all offer either one or the other of:
Faster than O(n*m) performance.
Preserve order of input list.
But so far no solution has both. If you want both, try this:
s = set(temp2)
temp3 = [x for x in temp1 if x not in s]
Performance test
import timeit
init = 'temp1 = list(range(100)...
ListCtrl 重绘（Custom Draw） - C/C++ - 清泛网 - 专注C/C++及内核技术
...s the control's prepaint
// stage, then tell Windows we want messages for every item.
if ( CDDS_PREPAINT == pLVCD->nmcd.dwDrawStage )
{
*pResult = CDRF_NOTIFYITEMDRAW;
}
else if ( CDDS_ITEMPREPAINT == pLVCD->nmcd.dwDrawStage )
{
// This is ...
Get encoding of a file in Windows
...er the default-selected encoding is, that is what your current encoding is for the file.
If it is UTF-8, you can change it to ANSI and click save to change the encoding (or visa-versa).
I realize there are many different types of encoding, but this was all I needed when I was informed our export f...
Is “inline” without “static” or “extern” ever useful in C99?
...) generated code.
[update, to elaborate]
I do not think there is any use for "inline" (without "static" or "extern") in a .c file. But in a header file it makes sense, and it requires a corresponding "extern inline" declaration in some .c file to actually generate the stand-alone code.
...
Why is reading lines from stdin much slower in C++ than Python?
...g. If you add this to the top of your main, you should see much better performance:
std::ios_base::sync_with_stdio(false);
Normally, when an input stream is buffered, instead of reading one character at a time, the stream will be read in larger chunks. This reduces the number of system calls, whi...
How to set default values in Rails?
I'm trying to find the best way to set default values for objects in Rails.
17 Answers
...
Select all text inside EditText when it gets focus
...
Also for me.. the above solution somehow did not work.. the programatically worked
– Martin Christmann
Aug 30 '13 at 13:27
...
Python concatenate text files
...
This should do it
For large files:
filenames = ['file1.txt', 'file2.txt', ...]
with open('path/to/output/file', 'w') as outfile:
for fname in filenames:
with open(fname) as infile:
for line in infile:
o...
Is using a lot of static methods a bad thing?
... a class when that class doesn't require to keep track of internal states. For example, if I need to transform A into B and don't rely on some internal state C that may vary, I create a static transform. If there is an internal state C that I want to be able to adjust, then I add a constructor to se...
When should I use GET or POST method? What's the difference between them?
...POSTs may have side effects. In plain English, that means that GET is used for viewing something, without changing it, while POST is used for changing something. For example, a search page should use GET, while a form that changes your password should use POST.
Also, note that PHP confuses the conc...