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Numpy: find first index of value fast
...he time to find it.
The array had 1 million elements and tests were run 100 times. Results still fluctuate a bit, but the qualitative trend is clear: Python and f2py quit at the first element so they scale differently. Python gets too slow if the needle is not in the first 1%, whereas f2py is fas...
SqlException from Entity Framework - New transaction is not allowed because there are other threads
...:
foreach (var client in clientList.OrderBy(c => c.Id).QueryInChunksOf(100))
{
// do stuff
context.SaveChanges();
}
The queryable object you call this method on must be ordered. This is because Entity Framework only supports IQueryable<T>.Skip(int) on ordered queries, which make...
ThreadXxx.cc:100: error: ‘::pthread_kill’ has not been declared - c+...
#include <pthread.h>
#include <signal.h>
除了pthread.h外，还要引入signal.h头文件才行，解决。
ThreadXxx.h:100: error: ‘pthread_t’ was not declared in this scope -...
pthread_t在头文件/usr/include/bits/pthreadtypes.h中定义：typedef unsigned long int pthread_t;复制代码它是一个线程的标识符。
#include <pthread.h> 解决。
XXX.cc:100: error: ‘::strerror’ has not been declared - c++1y / stl - 清泛IT社区，为创新赋能！
#include <string.h> 解决。
Linux 网卡速率（百兆/千兆）的查看及调整 - 操作系统(内核) - 清泛网 - 专...
...较大，机器是千兆网卡。但通过监控查看实际网速只到了100Mbps，通过查看网 最近遇到一个奇怪的问题，程序运行过程中网卡打满，导致服务通信全部超时，程序需要在局域网中的通信流量较大，机器是千兆网卡。但通过监控...
在APP Inventor的BLE组件使用RequestMTU方法之后，发送的字符数依旧限制在2...
目前APP是能连接上蓝牙，也能传输数据，但是发送和接受的数据都是20字节的分包。使用BLE调试宝，在里面修改MTU，返回的值是512，并且是修改成功的，但是在编程中使用RequestMTU方式设置512,，并且读取返回值也是512，然后调用...
How to determine the Boost version on a system?
...
std::cout << "Using Boost "
<< BOOST_VERSION / 100000 << "." // major version
<< BOOST_VERSION / 100 % 1000 << "." // minor version
<< BOOST_VERSION % 100 // patch level
<< std::endl;
Outpu...
anchor jumping by using javascript
...tton onclick="myFunction()">Load Prompt</button>
<span id="test100"><h4>Hello</h4></span>
On the .js file I have
function myFunction() {
var input = prompt("list or new or quit");
while(input !== "quit") {
if(input ==="test100") {
win...
Set ImageView width and height programmatically?
...s:
LinearLayout.LayoutParams layoutParams = new LinearLayout.LayoutParams(100, 100);
iv.setLayoutParams(layoutParams);
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