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How do I use a file grep comparison inside a bash if/else statement?
...grep:
Exit status is 0 if any line was selected, 1 otherwise;
if any error occurs and -q was not given, the exit status is 2.
if grep --quiet MYSQL_ROLE=master /etc/aws/hosts.conf; then
echo exists
else
echo not found
fi
You may want to use a more specific regex, such as ^MYSQL_ROLE=ma...
Should I use an exception specifier in C++?
...tack-trace, than to silently/violently die.
Write code that returns common errors and throws on exceptional occasions.
Error e = open( "bla.txt" );
if( e == FileNotFound )
MessageUser( "File bla.txt not found" );
if( e == AccessDenied )
MessageUser( "Failed to open bla.txt, because we don't...
Difference between open and codecs.open in Python
...g in Python 3. Doing so means you get correctly decoded Unicode, or get an error right off the bat, making it much easier to debug.
Pure ASCII "plain text" is a myth from the distant past. Proper English text uses curly quotes, em-dashes, bullets, € (euro signs) and even diaeresis (¨). Don't be ...
Xcode stuck on Indexing
...at I accidentally defined a class as its own subclass. I got no warning or error for this but the compiling got stuck.
class mainClass : mainClass
{
...
}
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How to prevent errno 32 broken pipe?
...IPE signal or setting a dummy signal handler for it. In this case a simple error will be returned when writing to a closed socket. In your case a python seems to throw an exception that can be handled as a premature disconnect of the client.
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What does string::npos mean in this code?
..."not found"); // assume it returns npos
if (idx == std::string::npos) { // ERROR: comparison might not work
...
}
One way to avoid this error is to check whether the search fails directly:
if (s.find("hi") == std::string::npos) {
...
}
However, often you need the index of the matching character...
Permission denied (publickey) when deploying heroku code. fatal: The remote end hung up unexpectedly
...so try ssh-keygen -t rsa -C "your_email@youremail.com" if still having the error, to create another file.pub and use that one in the recommended command in this answer
– Tom Roggero
Oct 23 '12 at 4:01
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How to Execute SQL Server Stored Procedure in SQL Developer?
... Are there any exceptions to this rule? I seem to be getting the error "Incorrect syntax near 'sp_dev_mystoredproc'." when executing with this syntax.
– nuzzolilo
Oct 24 '15 at 2:30
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How to extract img src, title and alt from html using php? [duplicate]
...
Call this function beforehand to handle errors gracefully: libxml_use_internal_errors( true );. You can also loop over those XML errors with libxml_get_errors()
– Matt
Jan 13 '12 at 17:10
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MySQL Workbench: How to keep the connection alive
Error Code: 2013. Lost connection to MySQL server during query
9 Answers
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