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How to construct a set out of list items in python?
...
Just note that the order of the elements in a list is generally lost when converting the list to a set since a set is inherently unordered. (One exception in CPython, though, seems to be if the list consists only of non-negative integers, but I assume this is a consequence of the implementation of ...
return query based on date
...we do it all in one shot: new Date(new Date().getTime()-60*5*1000)
...then convert to ISO string: .toISOString()
new Date(new Date().getTime()-60*5*1000).toISOString() gives us 2017-01-14T08:53:17.586Z
Of course this is a little easier with variables if you're using the node-mongodb-native driver,...
How do I make a checkbox required on an ASP.NET form?
...ge.IsValid Then
'do logic
End If
Sorry for the VB code . . . you can convert it to C# if that is your pleasure. The company I am working for right now requires VB :(
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Android: how to make keyboard enter button say “Search” and handle its click?
...onListener() {
@Override
public boolean onEditorAction(TextView v, int actionId, KeyEvent event) {
if (actionId == EditorInfo.IME_ACTION_SEARCH) {
performSearch();
return true;
}
return false;
}
});
...
How to retrieve an element from a set without removing it?
...e PEP 20 zealot in me that the most verbose solution is the best. At least converting a set into a list just to extract the first element of the set is as horrible as expected. Thank Guido, may his light continue to guide us.
Surprisingly, the RNG-based solution is absolutely horrible. List convers...
C++ include and import difference
...type libraries or .tlbs (COM stuff).
The content of the type library is converted into C++ classes, mostly describing the COM interfaces for you automatically, and then it is included into your file.
The #import directive was introduced by Microsoft as an extension to the C++ language. You ca...
Plot a bar using matplotlib using a dictionary
...e code does not work with Python 3. For Python 3, the D.keys() needs to be converted to a list.
import matplotlib.pyplot as plt
D = {u'Label1':26, u'Label2': 17, u'Label3':30}
plt.bar(range(len(D)), D.values(), align='center')
plt.xticks(range(len(D)), list(D.keys()))
plt.show()
...
How to define different dependencies for different product flavors
I am converting one of my apps to Gradle and would like to use the new build flavor features to have a paid and a free ad based flavor.
...
How to assign colors to categorical variables in ggplot2 that have stable mapping?
...
The easiest solution is to convert your categorical variable to a factor prior to the subsetting. Bottomline is that you need a factor variable with exact the same levels in all your subsets.
library(ggplot2)
dataset <- data.frame(category = rep(LE...
Why prefer two's complement over sign-and-magnitude for signed numbers?
...ut the article on Wikipedia.
Say you have two numbers, 2 and -1. In your "intuitive" way of representing numbers, they would be 0010 and 1001, respectively (I'm sticking to 4 bits for size). In the two's complement way, they are 0010 and 1111. Now, let's say I want to add them.
Two's complement ad...