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Use of ~ (tilde) in R programming Language
...mple, the version above is the same as the original version, since the dot means "all variables not yet used." This looks at the data.frame you use in your eventual model call, sees which variables exist in the data.frame but aren't explicitly mentioned in your formula, and replaces the dot with tho...
Proper way to handle multiple forms on one page in Django
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Using a single <form> tag like this means required fields are required globally when they should be per-form depending on which submit button was clicked. Splitting into two <form> tags (with the same action) works.
– Flash
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Referencing another schema in Mongoose
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@KarlMorrison ref field means in which collection the id mentioned is going to be searched for.
– Ankur Verma
Sep 19 '16 at 6:33
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Using tags in the with other HTML
...ng implication of the scoped attribute that pertains to this question. It means that future browsers are mandated via the standard to allow <style> elements within the <body> (as long as the <style> elements are scoped.)
So, given that:
Almost every existing browser currently i...
What’s the difference between ScalaTest and Scala Specs unit test frameworks?
...meone else's test code that uses ScalaTest would be able to guess what the meaning was without looking anything up in the ScalaTest documentation. I wanted ScalaTest client code to be drop dead obvious. One way that goal manifested itself is that ScalaTest is very conservative about operators. I onl...
How can you find out which process is listening on a port on Windows?
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@bcorso, What does binding to "unspecified address" mean?
– Pacerier
Jan 22 '16 at 14:36
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How does Java Garbage Collection work with Circular References?
... of speed. For example, most modern garbage collectors are "generational", meaning that they divide objects into generations, and as an object gets older, the garbage collector goes longer and longer between times that it tries to figure out whether that object is still valid or not -- it just start...
How does generic lambda work in C++14?
...les than the classic auto ? If we refer to the templated analogy, it would mean the auto is not auto, it is the same rules as template type deduction. Then the question is : is template deduction equivalent to auto ?
– v.oddou
Dec 9 '14 at 3:37
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Call a function with argument list in python
...her answers:
In the line:
def wrapper(func, *args):
The * next to args means "take the rest of the parameters given and put them in a list called args".
In the line:
func(*args)
The * next to args here means "take this list called args and 'unwrap' it into the rest of the parameters.
S...
Easiest way to toggle 2 classes in jQuery
...ssumes a context where you:
the element doesn't have an init class (that means you cannot do toggleClass('a b'))
you have to get the class dynamically from somewhere
An example of this scenario could be buttons that has the class to be switched on another element (say tabs in a container).
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