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TCP 的那些事儿（上） - 更多技术 - 清泛网 - 专注C/C++及内核技术
...处理正常的大负载的连接的情况。因为，synccookies是妥协版的TCP协议，并不严谨。对于正常的请求，你应该调整三个TCP参数可供你选择，第一个是：tcp_synack_retries 可以用他来减少重试次数；第二个是：tcp_max_syn_backlog，可以增大SY...
How to get key names from JSON using jq
...est.testPack", "Implementation-Version" : "testBox", "Manifest-Version" : "1.0", "appname" : "testApp", "build-date" : "02-03-2014-13:41", "version" : "testBox" }
$ jq 'keys' file.json
[
"Archiver-Version",
"Build-Id",
"Build-Jdk",
"Build-Number",
"Build-Tag",
"Built-By",
"Created-By"...
How do I create my own URL protocol? (e.g. so://…) [closed]
...didn't support different CLR runtimes in the same process, so if I wrote a 1.0 handler and you wrote a 2.0 one, and both of our products were installed on a customers computer, together we'd insure that the browser crashes every time it launched. The 4.0 runtime tried to target this issue but my rec...
What requests do browsers' “F5” and “Ctrl + F5” refreshes generate?
...────────┤
│ │ │ │ │ Chrome 1.0 │
│ │ │ │ │ ┌───────────────────────────────────┤
│ │ │ │ │ │ Opera 10...
Using GZIP compression with Spring Boot/MVC/JavaConfig with RESTful
...cally the same solution as @andy-wilkinson provided, but as of Spring Boot 1.0 the customize(...) method has a ConfigurableEmbeddedServletContainer parameter.
Another thing that is worth mentioning is that Tomcat only compresses content types of text/html, text/xml and text/plain by default. Below...
Vertically centering a div inside another div [duplicate]
...24.0 (minimum 12.1)
Safari 5.1.7 (minimum 4 with -webkit- prefix)
Firefox 31.0 (minimum 3.6 with -moz- prefix, from 16 without prefix)
Chrome 36 (minimum 11 with -webkit- prefix, from 36 without prefix)
IE 11, 10 (minimum 9 with -ms- prefix, from 10 without prefix)
More browsers, Can I Use?
...
Is it possible to use the instanceof operator in a switch statement?
...ze((String s) -> new BigDecimal(s))
.orElse(() -> -1)
.apply(1.0d); // result: -1
It's not the most natural paradigm in the Java world so use it with caution. While the generic methods will save you from having to typecast the matched value, we're missing a standard way to decompose t...
Android Studio - How to Change Android SDK Path
...
From Android Studio 1.0.1
Go to
File -> project Structure into Project Structure
Left -> SDK Location
SDK location select Android SDK location (old version use Press +, add another sdk)
...
Base64 length calculation?
... Double calcBase64SizeInKBytes(String base64String) {
Double result = -1.0;
if(StringUtils.isNotEmpty(base64String)) {
Integer padding = 0;
if(base64String.endsWith("==")) {
padding = 2;
}
else {
if (base64String.endsWith("=")) padding ...
iOS开发过程中的各种tips - 更多技术 - 清泛网 - 专注C/C++及内核技术
...
[self performSelector:@selector(dismissModal) withObject:self afterDelay:1.0];
35.用NSDateFormatter调整时间格式代码
NSDateFormatter *dateFormatter = [[NSDateFormatter alloc]init];
dateFormatter.dateFormat = @"yyyy-MM-dd HH:mm:ss";
NSString *currentDateStr = [dateFormatter stringFrom...