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Python pandas: fill a dataframe row by row
The simple task of adding a row to a pandas.DataFrame object seems to be hard to accomplish. There are 3 stackoverflow questions relating to this, none of which give a working answer.
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WPF Button with Image
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This is a pretty bad solution as the text and image won't be grayed out when you disable the button.
– Num Lock
May 24 '17 at 9:22
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bower automatically update bower.json
I run the following commands using bower 1.0.0:
1 Answer
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Pandas every nth row
...d use iloc, which takes a row/column slice, both based on integer position and following normal python syntax.
df.iloc[::5, :]
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How do I setup a SSL certificate for an express.js server?
...correct signature. connect() is simply an alias for connect.createServer() and therefore so is express() (which probably does some extra initialization, but the result is still a function appropriate for use as a request handler).
– ebohlman
Aug 6 '12 at 1:08
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How can I pass selected row to commandLink inside dataTable or ui:repeat?
...m using Primefaces in a JSF 2 application. I have a <p:dataTable> , and instead of selecting rows, I want the user to be able to directly execute various actions on individual rows. For that, I have several <p:commandLink> s in the last column.
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Copying text to the clipboard using Java
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This works for me and is quite simple:
Import these:
import java.awt.datatransfer.StringSelection;
import java.awt.Toolkit;
import java.awt.datatransfer.Clipboard;
And then put this snippet of code wherever you'd like to alter the clipboar...
Ruby on Rails: How do I add a not null constraint to an existing column using a migration?
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I had to change it for a bunch of columns and this doesn't require specifying the column type for each column, much better!
– Dorian
Jan 8 '15 at 12:19
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runOnUiThread vs Looper.getMainLooper().post in Android
...versus Looper.getMainLooper().post() to execute a task on the UI thread in Android??
1 Answer
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Escape regex special characters in a Python string
...o write ([\"]) as a plain string, you'd need to
double all the backslashes and write '([\\"])'. Raw strings are friendlier when
you're writing regular expressions.
In the substitution pattern, you need to escape \ to distinguish it from a
backslash that precedes a substitution group, e.g. \1, hence ...