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In JavaScript can I make a “click” event fire programmatically for a file input element?
...ow to trigger file input.
The only convenient alternative is to create a "hidden" file input (using opacity, not "hidden" or "display: none"!) and afterwards create the button "below" it. In this way the button is seen but on user click it actually activates the file input.
Hope this helps! :)
&l...
How can I filter a Django query with a list of values?
...n you can't use =.
The sql query will be like SELECT * FROM mytable WHERE ids=[1, 3, 6, 7, 9] which is not true. You have to use in operator for this so you query will be like SELECT * FROM mytable WHERE ids in (1, 3, 6, 7, 9) for that Django provide __in operator.
...
What is the pythonic way to avoid default parameters that are empty lists?
...
Existing answers have already provided the direct solutions as asked for. However, since this is a very common pitfall for new Python programmers, it worth to add the explanation why python behaves this way, which is nicely summarized in "the Hitchhikers Guid...
PostgreSQL: insert from another table
...
Just supply literal values in the SELECT:
INSERT INTO TABLE1 (id, col_1, col_2, col_3)
SELECT id, 'data1', 'data2', 'data3'
FROM TABLE2
WHERE col_a = 'something';
A select list can contain any value expression:
But the expressions in the select list do not have to reference any co...
Why does ASP.NET webforms need the Runat=“Server” attribute?
....
It continues:
If <runat=client> was required for all client-side tags, the parser would need to parse all tags and strip out the <runat=client> part.
He continues:
Currently,
If my guess is correct, the parser
simply ignores all text (tags or no
tags) unless it is a...
Is JavaScript guaranteed to be single-threaded?
...d question. I'd love to say “yes”. I can't.
JavaScript is usually considered to have a single thread of execution visible to scripts(*), so that when your inline script, event listener or timeout is entered, you remain completely in control until you return from the end of your block or functio...
Hiding textarea resize handle in Safari
...
You can override the resize behaviour with CSS:
textarea
{
resize: none;
}
or just simply
<textarea style="resize: none;">TEXT TEXT TEXT</textarea>
Valid properties are: both, horizontal, vertical, none
...
Invalidating JSON Web Tokens
...ing over from a cookie based session approach (by this, I mean, storing an id to a key-value store containing user sessions in a user's browser) to a token-based session approach (no key-value store) using JSON Web Tokens (jwt).
...
Convert XML String to Object
...rk >= 4.5 as project target and 'Windows Communication Foundation' individual component installed
Copy content of your XML file to clipboard
Add to your solution new, empty class file (Shift+Alt+C)
Open that file and in menu click Edit > Paste special > Paste XML As Classes
And that's ...
What do helper and helper_method do?
...pplication_controller.rb
def current_user
@current_user ||= User.find_by_id!(session[:user_id])
end
helper_method :current_user
the helper method on the other hand, is for importing an entire helper to the views provided by the controller (and it's inherited controllers). What this means is doin...