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In PHP, why does not show a parse error?
...t;? ... ?> (known as short_open_tag)
<?php ... ?> (the standard really)
<script language="php"> ... </script> (not recommended)
<% ... %> (deprecated and removed ASP-style tag after 5.3.0)
Apparently, you can open a PHP block one way, and close it the other. Didn't know ...
Import pandas dataframe column as string not int
...import the following csv as strings not as int64. Pandas read_csv automatically converts it to int64, but I need this column as string.
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Vim: How do you open another [No Name] buffer like the one on startup?
...user can save to a file of her/his choosing, just like the initial buffer called [No Name] . How can I do this?
3 Answers
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How do I create a pylintrc file
...n here, we can use the following command to generate a pylint rc file with all its options present:
pylint --generate-rcfile > $HOME/.pylintrc
The above command will create the file .pylintrc under your home directory. Then you can tweak the rc file to fit your needs.
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How to convert an enum type variable to a string?
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There really is no beautiful way of doing this. Just set up an array of strings indexed by the enum.
If you do a lot of output, you can define an operator<< that takes an enum parameter and does the lookup for you.
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Add column to SQL Server
...erver 2008 the first one is a metadata only change. The second will update all rows.
In SQL Server 2012+ Enterprise edition the second one is a metadata only change too.
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Converting String array to java.util.List
...>(Arrays.asList(new String[]{"one", "two", "three"}));
This will copy all elements from the source array into a new list (complexity: O(n))
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Convert UNIX epoch to Date object
...16:32:00 CST"
R> anydate(1352068320)
[1] "2012-11-04"
R>
Note how all this works without any format or origin arguments.
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Turn Pandas Multi-Index into column
...he parameter is drop=False (which will keep the index values as columns).
All you have to do add .reset_index(inplace=True) after the name of the DataFrame:
df.reset_index(inplace=True)
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Shortest distance between a point and a line segment
...ode, in C++. It presumes a class 2D-vector class vec2 {float x,y;}, essentially, with operators to add, subract, scale, etc, and a distance and dot product function (i.e. x1 x2 + y1 y2).
float minimum_distance(vec2 v, vec2 w, vec2 p) {
// Return minimum distance between line segment vw and point ...