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When to use extern in C++
... variables in a header, so that each source file that includes the header knows about it, but you only need to “define” it once in one of your source files.
To clarify, using extern int x; tells the compiler that an object of type int called x exists somewhere. It's not the compilers job to kno...
Mysql - How to quit/exit from stored procedure
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@jlh it was wrong (text corrected now) in that I didn’t know about mysql’s label technique, but the code isn’t wrong - it will work, on any DB actually.
– Bohemian♦
Nov 21 '18 at 14:53
...
(SC) DeleteService FAILED 1072
...Name"
C:\server>sc delete "ServiceName"
[SC] DeleteService SUCCESS
Now, if I execute another sc command, what I get is the following:
C:\server>sc delete "ServiceName"
[SC] OpenService FAILED 1060:
The specified service does not exist as an installed service.
But not the 1072 error m...
CSS @media print issues with background-color;
...tag
and this is printing preview on chrome before adding !important
now, to know how to inject !important to div's style, check out this answer I'm unable to inject a style with an “!important” rule
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How to change Elasticsearch max memory size
... Environment=ES_HEAP_SIZE=8G
just below the other "Environment=*" lines.
Now reload the service script with systemctl daemon-reload and restart the service. The job should be done!
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improve...
HTML text input allow only numeric input
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} else {
this.value = "";
}
});
});
}
You can now use the setInputFilter function to install an input filter:
setInputFilter(document.getElementById("myTextBox"), function(value) {
return /^\d*\.?\d*$/.test(value); // Allow digits and '.' only, using a RegExp
});
Se...
How can I make an EXE file from a Python program? [duplicate]
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Also known as Frozen Binaries but not the same as as the output of a true compiler- they run byte code through a virtual machine (PVM). Run the same as a compiled program just larger because the program is being compiled along with...
How to find the largest file in a directory and its subdirectories?
...as I can tell, this notation is still supported by modern GNU sort, though now that I look, it seems to have been dropped from the sort man page after around version 5.1. You can see it in the man page for sort for FreeBSD 4.11. I guess I haven't read sort's man page since before FreeBSD 5.0 was r...
PHP convert XML to JSON
...jects differently than strings. I cast the object to a string and it works now.
foreach($xml->children() as $state)
{
$states[]= array('state' => (string)$state->name);
}
echo json_encode($states);
sha...
How do I clear my local working directory in Git? [duplicate]
...y
## clear the working copy
git checkout empty
Your working copy should now be clear of any managed content. All that remains are unmanaged files and the .git folder itself.
To re-populate your working copy...
git checkout master ## or whatever branch you will be using
If you're a forward ...