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Colors with unix command “watch”?
...t know the flags or there isn't you can make a poor's man watch by:
while sleep <time>; do clear; <command>; done
It will have a bit of flicker (watch works "double buffered") but for some stuff it is useful enough.
You may be tempted to make a double buffered poor man's watch using ...
What does the 'static' keyword do in a class?
...s if they were instance members, e.g.
// Bad code!
Thread.currentThread().sleep(5000);
someOtherThread.sleep(5000);
That makes it look as if sleep is an instance method, but it's actually a static method - it always makes the current thread sleep. It's better practice to make this clear in the ca...
BSS段、数据段、代码段、堆与栈 剖析 - C/C++ - 清泛网 - 专注C/C++及内核技术
...大小并不固定，可动态扩张或缩减。当进程调用malloc 等函数分配内存时，新分配的内存就被动态添加到堆上（堆被扩张）；当利用free 等函数释放内存时，被释放的内存从堆中被剔除（堆被缩减）
栈(stack)：栈又称堆栈， 是用...
Android代码优化小技巧 - 更多技术 - 清泛网 - 专注C/C++及内核技术
...的私有成员。为了去除这种差异，编译器会产生一些仿造函数：
/*package*/ static int Foo.access$100(Foo foo) {
return foo.mValue;
}
/*package*/ static void Foo.access$200(Foo foo, int value) {
foo.doStuff(value);
}
每当内部类需要访问外部类中的mVa...
How do I parallelize a simple Python loop?
...ort concurrent.futures
import time, random # add some random sleep time
offset = 2 # you don't supply these so
def calc_stuff(parameter=None): # these are examples.
sleep_time = random.choice([0, 1, 2, 3, 4, 5])
time.sleep(sleep_time)
return parame...
File Hash 扩展：文件哈希计算和 Base64 编码文件，sha256、sha512 哈希 ·...
...概述
扩展特性
截图
函数
使用示例
基本文件哈希计算
同时计算 SHA256 和 SHA512
文件完整性验证
Base64 编码扩展
Base64 函数
B...
What is “thread local storage” in Python, and why do I need it?
...
Consider the following code:
#/usr/bin/env python
from time import sleep
from random import random
from threading import Thread, local
data = local()
def bar():
print("I'm called from", data.v)
def foo():
bar()
class T(Thread):
def run(self):
sleep(random())
d...
Timeout for python requests.get entire response
...gnaled later.
Here is some example code:
import signal
from time import sleep
class TimeoutException(Exception):
""" Simple Exception to be called on timeouts. """
pass
def _timeout(signum, frame):
""" Raise an TimeoutException.
This is intended for use as a signal handler.
...
AfxGetApp->GetMainWnd() 与 AfxGetMainWnd() - C/C++ - 清泛网 - 专注C/C++及内核技术
...只不过不是主线程罢了．还有就是用API Createthread之类的函数创建的线程无法生成CWinThread对象．所以如果想使用CWinThread对象里的函数，以及一些全局函数进行操作，如上面的AfxGetMainWnd()，就必须用CWinThread对象的CreateThread函数，...
MFC OnKeyDown没反应，不响应键盘操作 - C/C++ - 清泛网 - 专注C/C++及内核技术
...键盘操作在MFC中添加键盘的消息响应，通常是通过OnKeyDown函数来完成消息的捕捉和响应。afx_msg void OnKeyDown(UINT nChar, UINT nRepCnt, U...在MFC中添加键盘的消息响应，通常是通过OnKeyDown函数来完成消息的捕捉和响应。
afx_msg void OnKeyDow...