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Java 理论与实践: 线程池与工作队列 - 更多技术 - 清泛网 - 专注C/C++及内核技术
...er();
threads[i].start();
}
}
public void execute(Runnable r) {
synchronized(queue) {
queue.addLast(r);
queue.notify();
}
}
private class PoolWorker extends Thread {
public void run() {
Runnab...
Shell脚本编程30分钟入门 - 更多技术 - 清泛网 - 专注C/C++及内核技术
Shell脚本编程30分钟入门linux_shell_30min_guides什么是Shell脚本示例看个例子吧：#! bin shcd ~mkdir shell_tutcd shell_tutfor ((i=0; i<10; i++)); do touch test_$i.txt...
什么是Shell脚本
示例
看个例子吧：
#!/bin/sh
cd ~
mkdir shell_tut
cd shell_tut
for (...
How to implement a confirmation (yes/no) DialogPreference?
..., Federico gave you a site where you can look things up.
Here is a short example of how an alert dialog can be built.
new AlertDialog.Builder(this)
.setTitle("Title")
.setMessage("Do you really want to whatever?")
.setIcon(android.R.drawable.ic_dialog_alert)
.setPositiveButton(android.R.string.yes...
Autowiring two beans implementing same interface - how to set default bean to autowire?
...ation solved the problem - now the autowire-candidate property works as I expected.
– simon
May 10 '12 at 12:45
Thanks...
Creating a zero-filled pandas data frame
...
You can try this:
d = pd.DataFrame(0, index=np.arange(len(data)), columns=feature_list)
share
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Random float number generation
...used to generate pseudo-random numbers in C++. In combination with RAND_MAX and a little math, you can generate random numbers in any arbitrary interval you choose. This is sufficient for learning purposes and toy programs. If you need truly random numbers with normal distribution, you'll need to...
Fastest Way to Find Distance Between Two Lat/Long Points
...7.5, InnoDB tables now also support SPATIAL indices.
Create a SPATIAL index on these points
Use MBRContains() to find the values:
SELECT *
FROM table
WHERE MBRContains(LineFromText(CONCAT(
'('
, @lon + 10 / ( 111.1 / cos(RADIANS(@lon)))
, ' '
, @lat + 10 / 111...
Why should a function have only one exit-point? [closed]
I've always heard about a single exit-point function as a bad way to code because you lose readability and efficiency. I've never heard anybody argue the other side.
...
Is Java really slow?
... language (C, Fortran, etc.) can beat it; however, Java can be more than 10x as fast as PHP, Ruby, Python, etc. There are specific areas where it can beat common compiled languages (if they use standard libraries).
There is no excuse for "slow" Java applications now. Developers and legacy code/libr...
How do I 'overwrite', rather than 'merge', a branch on another branch in Git?
...w away branch 'A'" -p A -p B B^{tree})
This basically acts like the (non-existent) merge -s theirs strategy.
You can find the resulting history in the plumbing branch of the demo repository
Not very readable and not as easy to remember compared to the -s ours switch, but it does the job. The result...