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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
...i++) {
threads[i] = new PoolWorker();
threads[i].start();
}
}
public void execute(Runnable r) {
synchronized(queue) {
queue.addLast(r);
queue.notify();
}
}
private class PoolWorker extends Thread {
...
How does virtual inheritance solve the “diamond” (multiple inheritance) ambiguity?
...helped me to wrap head around virtual inheritance.
Double A
First, lets start with this code without virtual inheritance:
#include<iostream>
using namespace std;
class A {
public:
A() { cout << "A::A() "; }
A(int x) : m_x(x) { cout << "A::A(" << x ...
What is the preferred syntax for initializing a dict: curly brace literals {} or the dict() function
... always be a string
Not only contain digits, ASCII letters and underscores
Start with an integer (dict(1foo=2) raises a SyntaxError)
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Reshape three column data frame to matrix (“long” to “wide” format) [duplicate]
...
There are many ways to do this. This answer starts with what is quickly becoming the standard method, but also includes older methods and various other methods from answers to similar questions scattered around this site.
tmp <- data.frame(x=gl(2,3, labels=letters[...
Tool to convert Python code to be PEP8 compliant
...n several big companies. Was created later than yapf, but already has more starts at GitHub
yapf https://github.com/google/yapf Google code formatter
autopep8 https://github.com/hhatto/autopep8 build upon the
pycodestyle
sh...
Avoid web.config inheritance in child web application using inheritInChildApplications
...e in the connection string. This made the string unique and all of sudden started to fail.
Without doing any research on the exact reason for this, I have to assume that when the child application inherits the parents web.config values, it ignores identical key/value pairs.
We were able to solve ...
Share data between AngularJS controllers
...t;
Input should also be here: {{Person.name}}
</div>
//Script starts from here
<script>
var myApp = angular.module("myApp",[]);
//create SharedDataService
myApp.service('SharedDataService', function () {
var Person = {
name: ''
};
return Person;
});
//Firs...
How do I call setattr() on the current module?
... lookup. To defeat the optimization, forcing the dict you desire to exist, start the function with exec '': time a function with a couple substantial loops each way, and you'll see the importance of this core optimization to Python's performance.
– Alex Martelli
...
Why wasn't PyPy included in standard Python?
...eated running of compiled code that it becomes faster overall. This means startup times can be higher, and therefore PyPy isn't necessarily as efficient for running glue code or trivial scripts.
PyPy and CPython behavior is not identical in all respects, especially when it comes to "implementation ...
A variable modified inside a while loop is not remembered
...e=${arr[i]};
...
}
Variable $lines can be converted to an array without starting a new sub-shell. The characters \ and n has to be converted to some character (e.g. a real new line character) and use the IFS (Internal Field Separator) variable to split the string into array elements. This can be ...