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What does the * * CSS selector do?
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Just like any other time you put two selectors one after another (for example li a), you get the descendant combinator. So * * is any element that is a descendant of any other element — in other words, any element that isn't the root element of the whole docum...
Django ManyToMany filter()
...d it.
the above code will end up generating SQL that looks something like:
SELECT * FROM users WHERE id IN (SELECT user_id FROM userzones WHERE zone_id IN (1,2,3))
which is nice because it doesn't have any intermediate joins that could cause duplicate users to be returned
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Get the first item from an iterable that matches a condition
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Since this is the selected answer, I feel compelled to share an answer to selecting the first element correctly here. In short: usage of next shouldn't be encouraged.
– guyarad
Jul 7 '16 at 10:56
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Debugging iframes with Chrome developer tools
...ools in Chrome, there is a bar along the top, called the Execution Context Selector (h/t felipe-sabino), just under the Elements, Network, Sources... tabs, that changes depending on the context of the current tab. When in the Console tab there is a dropdown in that bar that allows you to select the...
Combining CSS Pseudo-elements, “:after” the “:last-child”
...this reason: the last-child is a modifier on the li, and then after you've selected all li elements that are last children you then select (and implicitly create) a new element before and after each.
– Martin Atkins
Nov 15 '11 at 14:52
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Is there a way to make a link clickable in the OSX Terminal?
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I had always been selecting the URL first (dragging the cursor from the start to end of the URL), then right clicking. I learned today, while reading through these answers, that it was not necessary to select the URL; simply right clicking on ...
How do you log all events fired by an element in jQuery?
...ouse'); // logs mouse events on the body
monitorEvents(document.body.querySelectorAll('input')); // logs all events on inputs
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What is The difference between ListBox and ListView
...ew, but you can easily create your own.
Another difference is the default selection mode: it's Single for a ListBox, but Extended for a ListView
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Django in / not in query
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table1.objects.extra(where=["table1.id NOT IN (SELECT table2.key_to_table1 FROM table2 WHERE table2.id = some_parm)"])
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What is the difference between jQuery's mouseout() and mouseleave()?
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Event Mouseout will trigger when mouse leaves the selected element and also when mouse leaves it's child elements also.
Event Mouseleave element will trigger when pointer will leave the selected element only.
Reference: W3School
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