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MySQL check if a table exists without throwing an exception
...or mysql_* functions, they are officially deprecated, no longer maintained and will be removed in the future. You should update your code with PDO or MySQLi to ensure the functionality of your project in the future.
– TRiG
Jun 10 '16 at 10:39
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javascript node.js next()
...samples here:
http://blog.mixu.net/2011/02/02/essential-node-js-patterns-and-snippets/
Let's look at the example you posted:
function loadUser(req, res, next) {
if (req.session.user_id) {
User.findById(req.session.user_id, function(user) {
if (user) {
req.currentUser = user;...
Difference between is and as keyword
Please tell what is the difference between is and as keyword in C#
14 Answers
14
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Android: how to make an activity return results to the activity which calls it?
...ation activity that can be called from many activities, such as Sign up and Order . In the Location activity the user enters his location, so the activity Location will return this new location to that activity which called it.
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How can I make an EXE file from a Python program? [duplicate]
...A .py to .exe converter using a simple graphical interface built using Eel and PyInstaller in Python.
py2exe is probably what you want, but it only works on Windows.
PyInstaller works on Windows and Linux.
Py2app works on the Mac.
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Scroll Element into View with Selenium
...olution for when you may have an element with position: fixed on your page and it is obscuring the element Selenium wants to click. Quite often these fixed elements go at the bottom, so setting scrollIntoView(true) moves it nicely to the top of the viewport.
– Mandible79
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remove nuget package restore from solution
...ou're manually editing your project files, make sure to close the solution and delete all the lines from the project at once, otherwise they're just added again once the project reloads...
UPDATE2:
Delete the .nuget folder from the solution root too
UPDATE3:
A later version of NuGet adds another...
how does multiplication differ for NumPy Matrix vs Array classes?
... to avoid using the matrix class is that a) it's inherently 2-dimensional, and b) there's additional overhead compared to a "normal" numpy array. If all you're doing is linear algebra, then by all means, feel free to use the matrix class... Personally I find it more trouble than it's worth, though.
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Track the time a command takes in UNIX/LINUX?
In UNIX/LINUX, is there an easy way to track the time a command takes?
3 Answers
3
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How do I check if file exists in jQuery or pure JavaScript?
...l, false);
http.send();
return http.status!=404;
}
Small changes and it could check for status HTTP status code 200 (success), instead.
EDIT 2: Since sync XMLHttpRequest is deprecated, you can add a utility method like this to do it async:
function executeIfFileExist(src, callback) {
...