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Remove rows with all or some NAs (missing values) in data.frame
...
tidyr has a new function drop_na:
library(tidyr)
df %>% drop_na()
# gene hsap mmul mmus rnor cfam
# 2 ENSG00000199674 0 2 2 2 2
# 6 ENSG00000221312 0 1 2 3 2
df %>% drop_na(rn...
Remove last item from array
...n.js"></script>
<b>Original Array : </b>
<div id="div1"></div>
<br/>
<b>After slice(0, -1): </b>
<div id="div2"></div>
instead of doing :
arr.slice(-1); // returns [2]
Here is a demo:
var arr = [1, 0, 2];
var ne...
Elegant setup of Python logging in Django
... - the corresponding value will be a dict in which each key is a formatter id and each value is a dict describing how to configure the corresponding Formatter instance.
filters - the corresponding value will be a dict in which each key is a filter id and each value is a dict describing how to config...
Paging with Oracle
... a.*, rownum r__
FROM
(
SELECT * FROM ORDERS WHERE CustomerID LIKE 'A%'
ORDER BY OrderDate DESC, ShippingDate DESC
) a
WHERE rownum < ((pageNumber * pageSize) + 1 )
)
WHERE r__ >= (((pageNumber-1) * pageSize) + 1)
...
Converting XML to JSON using Python?
... some understanding of what you want to do with the results.
That being said, Python's standard library has several modules for parsing XML (including DOM, SAX, and ElementTree). As of Python 2.6, support for converting Python data structures to and from JSON is included in the json module.
So th...
How can I put a database under git (version control)?
...ou make the new schema changes to and not touch the old one since as you said you are making a branch.
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How to adjust text font size to fit textview
Is there any way in android to adjust the textsize in a textview to fit the space it occupies?
22 Answers
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How to tag an older commit in Git?
...eb02 -m "Message here"
Where 9fceb02 is the beginning part of the commit id.
You can then push the tag using git push origin v1.2.
You can do git log to show all the commit id's in your current branch.
There is also a good chapter on tagging in the Pro Git book.
Warning: This creates tags with...
Downloading a large file using curl
...u don't need to use fwrite AND CURLOPT_FILE. Passing the $fp is enough. I did both and ended up with 1 at the end of content in the file.
– paperclip
Jan 30 '13 at 21:00
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How can i tell if an object has a key value observer attached
...{
[someObject removeObserver:someObserver forKeyPath:somePath];
}@catch(id anException){
//do nothing, obviously it wasn't attached because an exception was thrown
}
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