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Summarizing multiple columns with dplyr? [duplicate]
...r package which shifts the variables in columns "a" through "d" into rows. Then you use the group_by() and summarize() functions to get the mean of each group. If you want to present the data in a wide format, just tack on an additional call to the spread() function.
library(tidyverse)
# Crea...
Why are there two kinds of functions in Elixir?
...tion. You mentioned it yourself:
other_function(&hello(&1))
And then you asked, why I cannot simply pass it as hello as in other languages? That's because functions in Elixir are identified by name and arity. So a function that expects two arguments is a different function than one that e...
Handle ModelState Validation in ASP.NET Web API
...s question Web API 1 was just released, it's probably moved on a lot since then :)
– CallumVass
May 16 '14 at 15:06
Be...
Session variables in ASP.NET MVC
...g in a session state. This is something I find myself doing every now and then and it's a nice strongly typed approach to the whole thing but you should be careful when putting things in the session context. Not everything should be there just because it belongs to some user.
in global.asax hook t...
How does the “this” keyword work?
... an object, such as in obj.myMethod() or the equivalent obj["myMethod"](), then ThisBinding is set to the object (obj in the example; §13.2.1). In most other cases, ThisBinding is set to the global object (§10.4.3).
The reason for writing "in most other cases" is because there are eight ECMAScript...
Mixing Angular and ASP.NET MVC/Web api?
...C or WebForms (ugh) you spend this time getting it to spit out markup, and then have to do a couple of passes bolting client code onto it, which feels weird, is labor intensive, and because of the disconnected nature, wastes a lot of time doing simple things.
– moribvndvs
...
How do I compute derivative using Numpy?
...ult to set up choice. If you're fine restricting yourself to numpy syntax then Theano might be a good choice.
Here is an example using SymPy
In [1]: from sympy import *
In [2]: import numpy as np
In [3]: x = Symbol('x')
In [4]: y = x**2 + 1
In [5]: yprime = y.diff(x)
In [6]: yprime
Out[6]: 2⋅x
...
Is Response.End() considered harmful?
...re was some exceptional condition and no other action was possible. Maybe then, logging this exception might actually indicate a warning.
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Asp.net - Add blank item at top of dropdownlist
...ly, you can instantiate a ListItem, set its Selected property to true, and then insert it into drpList as above.
– skia.heliou
Jun 15 '15 at 16:22
3
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What is lexical scope?
...dummy2();
The call chain depends on a run time condition. If it is true, then the call chain looks like:
dummy1 --> fun()
If the condition is false:
dummy2 --> fun()
The outer scope of fun in both cases is the caller plus the caller of the caller and so on.
Just to mention that the C ...