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ALTER TABLE to add a composite primary key
...rimary key is being used as a foreign key by another table you will get an error when trying to drop it. In some versions of mysql the error message there was malformed (as of 5.5.17, this error message is still
alter table parent drop column id;
ERROR 1025 (HY000): Error on rename of
'./test/#sq...
How to completely remove node.js from Windows
...ind during the uninstall process, and it's causing me to have all sorts of errors when trying to add modules through npm. I've seen solutions to this for OSX and Linux, but couldn't find anything for Windows. I'm running Windows 7 64-bit.
...
Parsing huge logfiles in Node.js - read in line-by-line
...e readstream, possibly from a callback
s.resume();
})
.on('error', function(err){
console.log('Error while reading file.', err);
})
.on('end', function(){
console.log('Read entire file.')
})
);
Please let me know how it goes!
...
Python pip install fails: invalid command egg_info
...ntly often when I try to install a Python package using pip , I get the error(s) below.
15 Answers
...
Rails hidden field undefined method 'merge' error
...flow.com%2fquestions%2f6636875%2frails-hidden-field-undefined-method-merge-error%23new-answer', 'question_page');
}
);
Post as a guest
Name
...
How to convert jsonString to JSONObject in Java
...etype\":\"N95\",\"cat\":\"WP\"}");
}catch (JSONException err){
Log.d("Error", err.toString());
}
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Gunicorn worker timeout error
I have setup gunicorn with 3 workers 30 worker connections and using eventlet worker class. It is setup behind Nginx. After every few requests, I see this in the logs.
...
How to check if there exists a process with a given pid in Python?
...
Sending signal 0 to a pid will raise an OSError exception if the pid is not running, and do nothing otherwise.
import os
def check_pid(pid):
""" Check For the existence of a unix pid. """
try:
os.kill(pid, 0)
except OSError:
retu...
What causes javac to issue the “uses unchecked or unsafe operations” warning
... Just to point out, this is not collections specific. You get the error because Java compiler can't ensure type safety in general. For example, same warning is produced with the following code: AbstractMap.SimpleEntry<String, String> entry = new AbstractMap.SimpleEntry("hello", "world...
Get path of executable
...ORD result = GetModuleFileNameA(nullptr, &buf[0], size);
DWORD lastError = GetLastError();
if (result == 0)
{
shouldContinue = false;
}
else if (result < size)
{
havePath = true;
shouldContinue = false;
}
else if (
result == size
&...