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com.mysql.jdbc.exceptions.jdbc4.CommunicationsException: Communications link failure
...m.mysql.jdbc.exceptions.jdbc4.CommunicationsException: Communications link failure
java.net.ConnectException: Connection refused
I'm quoting from this answer which also contains a step-by-step MySQL+JDBC tutorial:
If you get a SQLException: Connection refused or Connection timed out or a MyS...
SensorUtil 传感器工具扩展：在后台和屏幕关闭时保持传感器工作 · App Inv...
... 在后台/后台执行期间保持传感器功能
通过前台服务（ForegroundService）和唤醒锁（WakeLock）实现
通过平均值机制平滑嘈杂的传感器数据
管理通知和电池优化权限
包含的组件
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How do you import a large MS SQL .sql file?
I use RedGate SQL data compare and generated a .sql file, so I could run it on my local machine. But the problem is that the file is over 300mb, which means I can't do copy and paste because the clipboard won't be able to handle it, and when I try to open the file in SQL Server Management Studio I g...
String to object in JS
...);
alert(myobj.hello); // 'world'
2)
var myobj = JSON.parse(JSON.stringify({
hello: "world"
});
alert(myobj.hello); // 'world'
3)
Passing a function to JSON
var obj = {
hello: "World",
sayHello: (function() {
console.log("I say Hello!");
}).toString()
};
var myobj = JSO...
How do I make UITableViewCell's ImageView a fixed size even when the image is smaller
I have a bunch of images I am using for cell's image views, they are all no bigger than 50x50. e.g. 40x50, 50x32, 20x37 .....
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How do I convert this list of dictionaries to a csv file?
I have a list of dictionaries that looks something like this:
7 Answers
7
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Any shortcut to initialize all array elements to zero?
...
A default value of 0 for arrays of integral types is guaranteed by the language spec:
Each class variable, instance variable, or array component is initialized with a default value when it is created (§15.9, §15.10) [...] F...
How to set the font size in Emacs?
I also want to save the font size in my .emacs file.
17 Answers
17
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Gradle finds wrong JAVA_HOME even though it's correctly set
When trying to run gradle, I get the following error:
19 Answers
19
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What can I use instead of the arrow operator, `->`?
What is the arrow operator ( -> ) a synonym for?
7 Answers
7
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