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Nodejs Event Loop
...ve until the script ends. CPU bound operation - execute in-line, I/O bound ones, request to the machinery as above.
When I/O completes, the listeners are called back.
The event machinery above is called libuv AKA event loop framework. Node leverages this library to implement its event driven progr...
Regex expressions in Java, \\s vs. \\s+
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The first one matches a single whitespace, whereas the second one matches one or many whitespaces. They're the so-called regular expression quantifiers, and they perform matches like this (taken from the documentation):
Greedy quantif...
What is the difference between String and string in C#?
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I always use the aliases because I've assumed one day it might come in handy because they are acting as an abstraction, so therefore can have their implementations changed without me having to know.
– Rob
Oct 12 '12 at 23:25
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Delegates in swift?
How does one go about making a delegate, i.e. NSUserNotificationCenterDelegate in swift?
12 Answers
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Add one row to pandas DataFrame
...ulated DataFrame but I need to create an empty DataFrame then add rows, one by one .
What is the best way to do this ?
2...
How do I declare a 2d array in C++ using new?
... this in mind and be sure to delete this memory from the heap when you're done with it to prevent leaks.
– Kekoa
Jun 1 '09 at 20:51
85
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Can you attach a UIGestureRecognizer to multiple views?
...se, for example if you want to move the tap gesture recognizer around from one view to another. That said, it's a silly limitation that the gesture recognizer cannot be used on multiple views.
– Erik van der Neut
Aug 27 '15 at 7:35
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Difference between natural join and inner join
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One significant difference between INNER JOIN and NATURAL JOIN is the number of columns returned.
Consider:
TableA TableB
+------------+----------+ +--------------------+
|Column1 | ...
How do I prevent 'git diff' from using a pager?
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As a previous answer mentioned, passing the -F option to less causes it to quit if the content is less than one screen. However, after doing so, the screen is reset, and you end up not seeing the content.
The -X option does away with that behaviour. ...
Decimal number regular expression, where digit after decimal is optional
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/\d+\.?\d*/
One or more digits (\d+), optional period (\.?), zero or more digits (\d*).
Depending on your usage or regex engine you may need to add start/end line anchors:
/^\d+\.?\d*$/
Debuggex Demo
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