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Get TransactionScope to work with async / await
...flow across thread continuations.
My understanding is that it is meant to allow you to write code like this:
// transaction scope
using (var scope = new TransactionScope(... ,
TransactionScopeAsyncFlowOption.Enabled))
{
// connection
using (var connection = new SqlConnection(_connectionStrin...
Detecting request type in PHP (GET, POST, PUT or DELETE)
...
By using
$_SERVER['REQUEST_METHOD']
Example
if ($_SERVER['REQUEST_METHOD'] === 'POST') {
// The request is using the POST method
}
For more details please see the documentation for the $_SERVER variable.
...
MQTT物联网协议完全实践指南 · App Inventor 2 中文网
...载：
de.ullisroboterseite.ursai2pahomqtt.aix
完整示例项目：
mqtt_demo.aia
MQTT协议深度解析
1. 协议架构与通信模式
MQTT采用客户端-服务器架构，基于发布/订阅（Publish/Subscribe）模式实现消息传递：
grap...
Golang production web application configuration
... timeout server 50000
frontend http
bind :80
acl is_stats hdr(host) -i hastats.myapp.com
use_backend stats if is_stats
default_backend myapp
capture request header Host len 20
capture request h...
Check if at least two out of three booleans are true
...he following on my machine (running Ubuntu on Intel Core 2 + sun java 1.6.0_15-b03 with HotSpot Server VM (14.1-b02, mixed mode)):
First and second iterations:
a&&b || b&&c || a&&c : 1740 ms
a ? b||c : b&&c : 1690 ms
a&b | b&c | c&a : 835 ms
...
Add new field to every document in a MongoDB collection
...field" : 1, "test" : "a" }
EDIT:
In case you want to add a new_field to all your collection, you have to use empty selector, and set multi flag to true (last param) to update all the documents
db.your_collection.update(
{},
{ $set: {"new_field": 1} },
false,
true
)
EDIT:
In the above ...
String's Maximum length in Java - calling length() method
...he maximum length that would be returned by the method would be Integer.MAX_VALUE, which is 2^31 - 1 (or approximately 2 billion.)
In terms of lengths and indexing of arrays, (such as char[], which is probably the way the internal data representation is implemented for Strings), Chapter 10: Arrays ...
What is the most efficient way to deep clone an object in JavaScript?
...
Native deep cloning
It's called "structured cloning", works experimentally in Node 11 and later, and hopefully will land in browsers. See this answer for more details.
Fast cloning with data loss - JSON.parse/stringify
If you do not use Dates, funct...
How to inherit constructors?
... design is important. You shouldn't be coding with 100% conviction that it all has to change.
– Jeff Yates
Oct 21 '08 at 19:59
11
...
How does Google Instant work?
...xactly how the new google instant search works? It seems to just be AJAX calls to the old search, but it's pretty hard to simplify Google that much. Anybody have speculations?
...