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How to change the output color of echo in Linux
... to the terminal's default
tput bel # Play a bell
With compiz wobbly windows, the bel command makes the terminal wobble for a second to draw the user's attention.
Scripts
tput accepts scripts containing one command per line, which are executed in order before tput exits.
Avoid temporary f...
What do 'statically linked' and 'dynamically linked' mean?
... form an executable.
The distinction is made for, among other things, allowing third party libraries to be included in your executable without you seeing their source code (such as libraries for database access, network communications and graphical user interfaces), or for compiling code in differe...
Determining complexity for recursive functions (Big O notation)
...4, even though the result is the same, shouldn't the induction be the following? T(n) = a + 2T(n-1) = a + 2a + 4T(n-1) = 3a + 4a + 8T(n-1) = a * (2^n - 1) + 2^n * T(0) = a * (2^n - 1) + b * 2^n = (a + b) * 2^n - a = O(2^n)
– Snowfish
Jan 3 at 22:59
...
What's “P=NP?”, and why is it such a famous question? [closed]
...NP or P!=NP. If anyone provides a proof for either conjecture, they will win US $1 million.
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How can I pair socks from a pile efficiently?
...ent than a modern CPU, this question makes no practical sense.
Humans can win over CPU algorithms using the fact that "finding a matching pair" can be one operation for a set that isn't too big.
My algorithm:
spread_all_socks_on_flat_surface();
while (socks_left_on_a_surface()) {
// Thanks t...
What are the differences between Autotools, Cmake and Scons?
... a painful experience to get an Autotools setup to build usable code for a Windows system. (While I've little use for Windows, it is a serious concern if you're developing purportedly cross-platform code.)
When it breaks, you're going to spend HOURS chasing your tail trying to sort out the things t...
How many GCC optimization levels are there?
... further optimizations
designed to reduce code size.
-Os disables the following optimization flags: -falign-functions -falign-jumps -falign-loops -falign-labels -freorder-blocks -freorder-blocks-and-partition -fprefetch-loop-arrays -ftree-vect-loop-version)
There may also be platform specific opti...
Why do we use __init__ in Python classes?
...
class Brazilian(Humans)
def do_your_special_thing
win_every_football_world_cup()
class Germans(Humans)
def drink(beverage):
if favorite_drink != beverage: print "I need more beer"
else: print "Lecker!"
class HighSchoolStudent(Americ...
Why do pthreads’ condition variable functions require a mutex?
...ed before you do a wait.
The wait will "atomically" unlock the mutex, allowing others access to the condition variable (for signalling). Then when the condition variable is signalled or broadcast to, one or more of the threads on the waiting list will be woken up and the mutex will be magically loc...
VC MFC工具栏(CToolBar)控件 - C/C++ - 清泛网 - 专注C/C++及内核技术
...SetImageList函数可以做到，既然要显示真彩位图，那就不能使用上面的工具栏资源（256色），所以一切都得到用代码实现
首先向工程引入六张位图（用于工具栏按钮显示的图片），假设ID号分别为IDB_BITMAP1，IDB_BITMAP2，IDB_BITMAP3,IDB_...