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Assign pandas dataframe column dtypes
...number":"int64",
"car_name":"object","minutes_spent":"float64"})
now you can see that it's changed
In [18]: data_df.dtypes
Out[18]:
wheel_number int64
car_name object
minutes_spent float64
share...
How to add a button to PreferenceScreen
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I know this is a bit late, but I just found a solution i like better than Max's praised solution.
You can simply add a footer (or if you like the button to be on top, a header) to the PreferenceActivity's ListView like so:
pub...
Why is not in HTML 5 Tag list while is?
...hy it wasn't, not that I agree with it. From the docs: "The small element now represents small print (for side comments and legal print)." dev.w3.org/html5/html4-differences
– Nick Craver♦
Feb 14 '10 at 3:40
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You can't specify target table for update in FROM clause
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@grisson Thanks for the clarification. Now I get why my IN clause doesn't work - I was targeting the same table.
– Anthony
Sep 4 '12 at 2:43
2
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What does curly brackets in the `var { … } = …` statements do?
...and have that variable only "visible" inside that block (JavaScript, until now, has function scope and not block scope as most other languages). So the let is basically a "fix" for something many people have issues with. Note that tihs is a JavaScript 1.7 feature.
Haven't found anything on {Foo}.
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Java HashMap performance optimization / alternative
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@Oscar - more collisions equals more work to do, because now you have to do a linear search of the hash chain. If you have 26,000,000 distinct values per equals(), and 26,000 distinct values per hashCode(), then the bucket chains will have 1,000 objects each.
–...
Vim multiline editing like in sublimetext?
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There are several ways to accomplish that in Vim. I don't know which are most
similar to Sublime Text's though.
The first one would be via multiline insert mode. Put your cursor to the
second "a" in the first line, press Ctrl-V, select all lines, then press I, and
put in a doubleq...
How to configure MongoDB Java driver MongoOptions for production use?
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the "slaveOk" option is now deprecated, if you want the equivalent of this to be true, do: mongoOptions.readPreference = ReadPreference.secondaryPreferred();
– Gubatron
Oct 18 '12 at 2:45
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What is external linkage and internal linkage?
...s internal. Its linkage is changed to external with the keyword extern. So now max can be accessed in other files.
n is defined as an integer variable. The default linkage for variables defined outside function bodies is external.
2.cpp
#include <iostream>
using namespace std;
extern cons...
Android: alternate layout xml for landscape mode
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I will try to explain it shortly.
First, you may notice that now you should use ConstraintLayout as requested by google (see androix library).
In your android studio projet, you can provide screen-specific layouts by creating additional res/layout/ directories. One for each screen con...