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How can I pass a member function where a free function is expected?
...e preferable than using a void* interface as they remove the potential for errors due to a cast to the wrong type.
To clarify how to use a function pointer to call a member function, here is an example:
// the function using the function pointers:
void somefunction(void (*fptr)(void*, int, int), v...
Elasticsearch query to return all records
...size=10000, at somewhere between 5th-7th iterations. with status=127, main ERROR Null object returned for RollingFile in Appenders, main ERROR Unable to locate appender "rolling" for logger config "root" No logs in /var/log/elasticsearch/elasticsearch.log
– stelios
...
SqlDataAdapter vs SqlDataReader
... the connection open with the SQLDataReader. Failure to do this, or proper error handling to close the connection in case of an error in processing the results will CRIPPLE your application with connection leaks.
Pardon my VB, but this is the minimum amount of code you should have when using a SqlD...
Git status ignore line endings / identical files / windows & linux environment / dropbox / mled
.... There is just a problem that happened with 3 lines printed, showing this error: sh: 1: Syntax error: Unterminated quoted string
– evandro777
Sep 6 '17 at 18:41
...
Why an abstract class implementing an interface can miss the declaration/implementation of one of th
... subclass of AbstractThing without implementing the m2 method and see what errors the compiler gives you. It will force you to implement this method.
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What are all the valid self-closing elements in XHTML (as implemented by the major browsers)?
...are not XHTML at all, but actually invalid HTML that’s getting by on the error handling of HTML parsers. All those “Valid XHTML 1.0!” links on the web are really saying “Invalid HTML 4.01!”.
To test whether you have real XHTML or invalid HTML with XHTML's DOCTYPE, put this in your docu...
How to execute an external program from within Node.js?
...
var exec = require('child_process').exec;
exec('pwd', function callback(error, stdout, stderr){
// result
});
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How to wait in bash for several subprocesses to finish and return exit code !=0 when any subprocess
...ions {}
GNU Parallel will give you exit code:
0 - All jobs ran without error.
1-253 - Some of the jobs failed. The exit status gives the number of failed jobs
254 - More than 253 jobs failed.
255 - Other error.
Watch the intro videos to learn more: http://pi.dk/1
...
What are the -Xms and -Xmx parameters when starting JVM?
... A common use for these flags is when you encounter a java.lang.OutOfMemoryError.
When using these settings, keep in mind that these settings are for the JVM's heap, and that the JVM can/will use more memory than just the size allocated to the heap. From Oracle's documentation:
Note that the JV...
Inheriting constructors
...est()
{
D1 d(6); // Oops: d.x is not initialized
D1 e; // error: D1 has no default constructor
}
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