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Difference between wait() and sleep()
...aited on whereas a sleep cannot. Also a wait (and notify) must happen in a block synchronized on the monitor object whereas sleep does not:
Object mon = ...;
synchronized (mon) {
mon.wait();
}
At this point the currently executing thread waits and releases the monitor. Another thread may do
...
Amazon S3 Change file download name
...t-disposition" while submit the file to S3, the SDK version is AWS SDK for PHP 3.x. here is the doc http://docs.amazonaws.cn/en_us/aws-sdk-php/latest/api-s3-2006-03-01.html#putobject
a piece of my code
public function __construct($config)
{
$this->handle = new S3Client([
...
How to declare a type as nullable in TypeScript?
...y might be invalid. To make the code robust, you should probably use an if block to check for null first, like this: if (emp) { console.log(emp.id); } If you use such an if-block, the TypeScript compiler and the editor "see" that the object inside the block is not null and thus will not generate err...
String variable interpolation Java [duplicate]
...P 326 (Raw String Literals) was withdrawn and superseeded by JEP 355 (Text Blocks). The latter tries to introduce "Text Blocks" into the language:
A text block is a multi-line string literal that avoids the need for
most escape sequences, automatically formats the string in a
predictable way...
Best way to define private methods for a class in Objective-C
...
Defining your private methods in the @implementation block is ideal for most purposes. Clang will see these within the @implementation, regardless of declaration order. There is no need to declare them in a class continuation (aka class extension) or named category.
In some ca...
How to make an image center (vertically & horizontally) inside a bigger div [duplicate]
...
This works correctly:
display: block;
margin-left: auto;
margin-right: auto
else try this if the above only gives you horizontal centering:
.outerContainer {
position: relative;
}
.innerContainer {
width: 50px; //your image/element width here
...
CSS horizontal centering of a fixed div?
...
If using inline-blocks is an option I would recommend this approach:
.container {
/* fixed position a zero-height full width container */
position: fixed;
top: 0; /* or whatever position is desired */
left: 0;
right: 0;...
Convert pem key to ssh-rsa format
...u5aSGbUvin3DusYAsl5sZjTf9VZgJHsVycOrtChC1tUi WMAWfv2BLTmK4zBEC33riEBLeX8Trphp3YbIMtzqV81ZrzHZbSnrAgMBAAE= -----END RSA PUBLIC KEY----- it doesn't have a description
– braden
Sep 18 '13 at 19:24
...
A CSS selector to get last visible div
...n the next element when the previous one is visible:
div[style='display: block;'] + table {
filter: blur(3px);
}
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廉价共享存储解决方案1-drbd+ha+nfs - 更多技术 - 清泛网 - 专注C/C++及内核技术
...的软件进入了视线
下面是一些简介
Distributed Replicated Block Device(DRBD)是一种基于软件的，无共享，复制的存储解决方案，在服务器之间的对块设备（硬盘，分区，逻辑卷等）进行镜像。DRBD工作在内核 当中的，类似于一种驱动...