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【解决】Error 515: Not connected to a Bluetooth device. - 创客硬件开发...
Error 515: Not connected to a Bluetooth device.
原因：经典蓝牙设备未正常连接上，就进行数据收发操作导致的异常，加一个连接状态判断就行。
Git Push error: refusing to update checked out branch
...flicts, committed then tried to Push my changes and received the following error:
11 Answers
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How do I redirect in expressjs while passing some context?
... show up and reset the next time you go to a page. It's handy for showing errors to users, but again it's been removed by default. EDIT: Found a library that adds this functionality.
Hopefully that will give you a general idea how to pass information around in an Express application.
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Android - Round to 2 decimal places [duplicate]
...wered Feb 20 '12 at 18:21
jersam515jersam515
68755 silver badges2222 bronze badges
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What is the difference between CMD and ENTRYPOINT in a Dockerfile?
...════════════╗
║ No CMD ║ error, not allowed ║
╟────────────────────────────╫─────────────────────────────╢
║ CMD [“...
ArrayIndexOutOfBoundsException with custom Android Adapter for multiple views in ListView
...p), but when I try to run the Activity that uses the ListView I receive an error and the app stops. The application is targeted for the Android 1.6 platform.
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Heroku + node.js error (Web process failed to bind to $PORT within 60 seconds of launch)
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The error happens when Heroku failed to bind the port or hostname at server.listen(port, [host], [backlog], [callback]).
What Heroku requires is .listen(process.env.PORT) or .listen(process.env.PORT, '0.0.0.0')
So more generica...
MySQL: Insert record if not exists in table
...-----+
And so on...
Update:
To prevent #1060 - Duplicate column name error in case two values may equal, you must name the columns of the inner SELECT:
INSERT INTO table_listnames (name, address, tele)
SELECT * FROM (SELECT 'Unknown' AS name, 'Unknown' AS address, '022' AS tele) AS tmp
WHERE ...
Serialize an object to XML
... }
}
catch (Exception ex)
{
throw new Exception("An error occurred", ex);
}
}
Its usage would be like this:
var xmlString = obj.Serialize();
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Reverse of JSON.stringify?
... JSON
document.body.innerHTML += obj.hello;
} catch (ex) {
console.error(ex);
}
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