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Why is volatile not considered useful in multithreaded C or C++ programming?
...ic operations necessary to implement a mutex; it only has volatile to make extra guarantees about ordinary operations.
Now you have something like this:
pthread_mutex_lock( &flag_guard_mutex );
my_local_state = my_shared_flag; // critical section
pthread_mutex_unlock( &flag_guard_mutex );
...
JavaScript regex multiline flag doesn't work
I wrote a regex to fetch string from HTML, but it seems the multiline flag doesn't work.
5 Answers
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How do I upload a file with metadata using a REST web service?
...p://example.com/add-file
...in which case request.args['files'] will be a string containing all the files, which you'll have to parse yourself — not sure how to do it, but I'm sure it's not difficult, or better just use the previous approaches.
The difference between @ and < is that @ causes t...
Using ping in c#
...
using System.Net.NetworkInformation;
public static bool PingHost(string nameOrAddress)
{
bool pingable = false;
Ping pinger = null;
try
{
pinger = new Ping();
PingReply reply = pinger.Send(nameOrAddress);
pingable = reply.Status == IPStatus.Success;...
Asynchronously load images with jQuery
...ge Base64 data using Ajax and then on completion you build the Base64 data string to the image! Great fun :). I recommend to use this site http://www.freeformatter.com/base64-encoder.html for image encoding.
$.ajax({
url : 'BASE64_IMAGE_REST_URL',
processData : false,
}).always(function(b...
How can I create an array with key value pairs?
...
In PHP arrays are actually maps, where the keys can be either integers or strings. Check out PHP: Arrays - Manual for more information.
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How to iterate through a DataTable
...
foreach(DataRow row in dt.Rows)
{
TextBox1.Text = row["ImagePath"].ToString();
}
...assumes the connection is open and the command is set up properly. I also didn't check the syntax, but it should give you the idea.
...
C#对象序列化与反序列化 - 更多技术 - 清泛网移动版 - 专注C/C++及内核技术
...须添加序列化特性
public class Person
{
private string Name;//姓名
private bool Sex;//性别，是否是男
public Person(string name, bool sex)
{
this.Name = name;
this.Sex = sex;
}
public override st...
What is the difference between jQuery: text() and html() ?
...lf-explanatory. And it's super trivial to test.
jQuery.html() treats the string as HTML, jQuery.text() treats the content as text
<html>
<head>
<title>Test Page</title>
<script type="text/javascript" src="http://ajax.googleapis.com/ajax/libs/jquery/1.3.2/jquery.min....
Proper way to catch exception from JSON.parse
... the contents of the iframe with json parse...so sometimes it's not a json string
Try this:
if(response) {
try {
a = JSON.parse(response);
} catch(e) {
alert(e); // error in the above string (in this case, yes)!
}
}
...