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Subset of rows containing NA (missing) values in a chosen column of a data frame
...taken. If the date was not recorded, the CSV file contains the value NA , for missing data.
6 Answers
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Why can I type alias functions and use them without casting?
...tructured.
If you compare two named types, the names must match in order for them to be interchangeable. If you compare a named and an unnamed type, then as long as the underlying representation matches, you're good to go!
e.g. given the following types:
type MyInt int
type MyMap map[int]int
typ...
Maven: missing net.sf.json-lib
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Looking at the maven-central repo, you need to specify a classifier for this dependency.
Either jdk13 or jdk15, like this:
<dependency>
<groupId>net.sf.json-lib</groupId>
<artifactId>json-lib</artifactId>
<version>2.4</version>
<cla...
Join a list of strings in python and wrap each string in quotation marks
...= ['hello', 'world', 'you', 'look', 'nice']
>>> ', '.join('"{0}"'.format(w) for w in words)
'"hello", "world", "you", "look", "nice"'
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In Python, how do I create a string of n characters in one line of code?
...there a one line answer to achieve this with the existing Python library? For instance, I need a string of 10 letters:
6 A...
How to select Python version in PyCharm?
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This will work for running the script, but is really meant for actual runs of the interpreter and can even be set per class. There is a project-wide setting that better fits.
– mateor
Oct 30 '14 at 2:3...
IntelliJ 13 - Add Navigate Back/Forward to toolbar?
...he icon groups are:
file | undo/redo | cut/copy/paste | font size | back/forward | compile/run | vcs | config | help | jira | tasks
You should be looking at the back/forward buttons in the 5th group.
If you want to make the toolbar visible, it's one of the checkable options on the view menu.
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Show filename and line number in grep output
I am trying to search my rails directory using grep. I am looking for a specific word and I want to grep to print out the file name and line number.
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How to optimize imports automatically after each save in IntelliJ IDEA
...er of imports (both of which IDEs can easily do, so it should not add work for anyone). Then the only diffs in imports are when imports actually change.
– Joachim Sauer
Jan 22 '15 at 12:23
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How to convert a Title to a URL slug in jQuery?
I'm working on an app in CodeIgniter, and I am trying to make a field on a form dynamically generate the URL slug. What I'd like to do is remove the punctuation, convert it to lowercase, and replace the spaces with hyphens. So for example, Shane's Rib Shack would become shanes-rib-shack.
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