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oracle:完整剖析PL/SQL DEVELOPER与SQL PLUS字符集设置 - 数据库(内核) - ...
...版本不限）
1、影响PL/SQL DEVELOPER字符集显示的要素
1.1 OS系统当前字符集
936表示操作系统当前字符集为简体中文，同ZHS16GBK.
1.2 ORACLE注册表
该键值默认读取OS系统当前字符集，当然可以修改。
1.3 系统环境变量NLS_LANG
环...
谷歌开源桌面操作系统 ChromeOS 安装体验 - 操作系统(内核) - 清泛网 - 专...
谷歌开源桌面操作系统 ChromeOS 安装体验ChromeOS是谷歌google开发的一个开源操作系统，为网络云端用户提供了一种更快速，更简单，更安全的上网体验！下面我们就来体验下最新的Chro...ChromeOS是谷歌google开发的一个开源操作系统，...
Mono - 跨平台 .NET运行环境 - 更多技术 - 清泛网 - 专注C/C++及内核技术
...以运行于Windows系统内,还可以运行于Linux, FreeBSD, Unix, Mac OS X和Solaris。
.NET to Objective-C bridge
mobjc is a Mono library which allows .NET code to interoperate with Apple frameworks such as foundation and appkit. It makes it possible for managed code to call native Object...
What is stack unwinding?
...
Stack unwinding is usually talked about in connection with exception handling. Here's an example:
void func( int x )
{
char* pleak = new char[1024]; // might be lost => memory leak
std::string s( "hello world" ); // will be properly de...
Maximum packet size for a TCP connection
...ypes of networks (like Token Ring) have larger MTUs, and some types have smaller MTUs, but the values are fixed for each physical technology.
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Is calculating an MD5 hash less CPU intensive than SHA family functions?
...s with sphlib, a library of hash function implementations in C (and Java). All implementations are from the same author (me) and were made with comparable efforts at optimizations; thus the speed differences can be considered as really intrinsic to the functions.
As a point of comparison, consider ...
How to handle floats and decimal separators with html5 input type number
... has a default value of 1. If you want the input's validation algorithm to allow floating-point values, specify a step accordingly.
For example, I wanted dollar amounts, so I specified a step like this:
<input type="number" name="price"
pattern="[0-9]+([\.,][0-9]+)?" step="0.01"
...
Where does Vagrant download its .box files to?
...d to store the .box temporarily whilst downloading but is deleted upon installation within Vagrant.
– Luke Peterson
May 14 '15 at 23:13
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Focusable EditText inside ListView
...dded as a header view) that contains an EditText widget and a Button . All I want to do is be able to use the jogball/arrows, to navigate the selector to individual items like normal, but when I get to a particular row -- even if I have to explicitly identify the row -- that has a focusable chil...
AsyncTask Android example
...o this is via switch statements. I have a complete class edited below with all suggestions to save confusion.
import android.app.Activity;
import android.os.AsyncTask;
import android.os.Bundle;
import android.provider.Settings.System;
import android.view.View;
import android.widget.Button;
import a...