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Java Singleton and Synchronization
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213
Yes, it is necessary. There are several methods you can use to achieve thread safety with lazy ...
Regex - Should hyphens be escaped? [duplicate]
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edited Nov 17 '16 at 15:01
djb
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ans...
ZMQ: 基本原理 - 开源 & Github - 清泛网 - 专注C/C++及内核技术
...两个节点或直接或通过一个或多个中介机构连接。
第1点很明显，故意使用单词“通道”而不是使用“连接”这一点是为了描述模型工作的实际情况，即使IP多播或UDP等无连接的底层传输亦是如此。
第2点说明所有拓扑里的...
ZMQ: 基本原理 - 开源 & Github - 清泛网 - 专注C/C++及内核技术
...两个节点或直接或通过一个或多个中介机构连接。
第1点很明显，故意使用单词“通道”而不是使用“连接”这一点是为了描述模型工作的实际情况，即使IP多播或UDP等无连接的底层传输亦是如此。
第2点说明所有拓扑里的...
Unmangling the result of std::type_info::name
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13 Answers
13
Active
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How to determine if a record is just created or updated in after_save
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169
I was looking to use this for an after_save callback.
A simpler solution is to use id_changed...
Vagrant error : Failed to mount folders in Linux guest
I have some issues with Vagrant shared folders, my base system is Ubuntu 13.10 desktop.
21 Answers
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How do I fit an image (img) inside a div and keep the aspect ratio?
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12 Answers
12
Active
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Mimicking sets in JavaScript?
...bj = {};
// or create an object with some items already in it
var obj = {"1":true, "2":true, "3":true, "9":true};
Question 1: Is A in the list:
if (A in obj) {
// put code here
}
Question 2: Delete 'A' from the list if it's there:
delete obj[A];
Question 3: Add 'A' to the list if it wasn't a...