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What does `kill -0 $pid` in a shell script do?
...pages:
kill(1)
$ man 1 kill
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If sig is 0, then no signal is sent, but error checking is still performed.
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kill(2)
$ man 2 kill
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If sig is 0, then no signal is sent, but error checking is still performed; this
can be used to check for the existence of a process ID or process group ID.
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MySQL Error 1093 - Can't specify target table for update in FROM clause
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Update: This answer covers the general error classification. For a more specific answer about how to best handle the OP's exact query, please see other answers to this question
In MySQL, you can't modify the same table which you use in the SELECT part.
This behav...
ERROR 2002 (HY000): Can't connect to local MySQL server through socket '/var/run/mysqld/mysqld.sock'
... installed the mysql-server, not the mysql-client or something else.
That error means the file /var/run/mysqld/mysqld.sock doesn't exists, if you didn't install mysql-server, then the file would not exist. So in that case, install it with
sudo apt-get install mysql-server
But if the mysql-serve...
Equivalent of “throw” in R
How does one "throw" an error in R? I have a function that takes a data frame and some column names and does stuff with them. If the columns don't exist, I want the function to stop and to stop all functions depending on it.
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The target … overrides the `OTHER_LDFLAGS` build setting defined in `Pods/Pods.xcconfig
...ed) a bit faint as by default. i edited and simply retyped the same thing. error disappeared..
– joe
Feb 9 '16 at 22:23
3
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How to “set a breakpoint in malloc_error_break to debug”
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Set a breakpoint on malloc_error_break() by opening the Breakpoint Navigator (View->Navigators->Show Breakpoint Navigator or ⌘8), clicking the plus button in the lower left corner, and selecting "Add Symbolic Breakpoint". In the popup that come...
Media Player called in state 0, error (-38,0)
...start() in the onPrepared method by using a listener.
You are getting this error because you are calling mediaPlayer.start() before it has reached the prepared state.
Here is how you can do it :
mp.setDataSource(url);
mp.setOnPreparedListener(this);
mp.prepareAsync();
public void onPrepared(Medi...
JSONDecodeError: Expecting value: line 1 column 1 (char 0)
I am getting error Expecting value: line 1 column 1 (char 0) when trying to decode JSON.
16 Answers
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Retrieving the COM class factory for component with CLSID {XXXX} failed due to the following error:
...I deployed the service in Windows Server 2008 64 bit version, I got this error:
17 Answers
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How to get result of console.trace() as string in javascript with chrome or firefox?
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I'm not sure about firefox, but in v8/chrome you can use a method on the Error constructor called captureStackTrace. (More info here)
So a hacky way to get it would be:
var getStackTrace = function() {
var obj = {};
Error.captureStackTrace(obj, getStackTrace);
return obj.stack;
};
console...