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How to print to console when using Qt
...is good enough to print to stderr, you can use the following streams originally intended for debugging:
#include<QDebug>
//qInfo is qt5.5+ only.
qInfo() << "C++ Style Info Message";
qInfo( "C Style Info Message" );
qDebug() << "C++ Style Debug Message";
qDebug( "C Style Debug Me...
How to call a PHP function on the click of a button
...essfully");
});
});
});
In ajax.php
<?php
if (isset($_POST['action'])) {
switch ($_POST['action']) {
case 'insert':
insert();
break;
case 'select':
select();
break;
}
}
...
How to find whether or not a variable is empty in Bash
...variable is undefined and the set -u option (nounset) is activated. Almost all other answers to this question will fail with unbound variable in this case.
– anol
May 26 '15 at 16:29
...
List of tables, db schema, dump etc using the Python sqlite3 API
...te("SELECT name FROM sqlite_master WHERE type='table';")
print(cursor.fetchall())
Watch out for my other answer. There is a much faster way using pandas.
share
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Redis - Connect to Remote Server
I've just install Redis succesfully using the instructions on the Quick Start guide on http://redis.io/topics/quickstart on my Ubuntu 10.10 server. I'm running the service as dameon (so it can be run by init.d)
...
How can I replace a newline (\n) using sed?
...ns not to do it on the last line as there should be one final newline).
Finally the substitution replaces every newline with a space on the pattern space (which is the whole file).
Here is cross-platform compatible syntax which works with BSD and OS X's sed (as per @Benjie comment):
sed -e ':a' -...
“Least Astonishment” and the Mutable Default Argument
...
Actually, this is not a design flaw, and it is not because of internals, or performance.
It comes simply from the fact that functions in Python are first-class objects, and not only a piece of code.
As soon as you get to think i...
Comments in Android Layout xml
... > Also you cannot use them inside tags. Quite unfortunate really.
– linuxjava
Sep 3 '15 at 15:39
...
orderBy multiple fields in Angular
...'title'], which caused the featured true items to be at the top (alphabetically), then the rest of the items listed alphabetically.
– Daniel Nalbach
Jul 14 '15 at 21:56
...
How can I group data with an Angular filter?
...DATE: jsbin Remember the basic requirements to use angular.filter, specifically note you must add it to your module's dependencies:
(1) You can install angular-filter using 4 different methods:
clone & build this repository
via Bower: by running $ bower install angular-filter from ...