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Remove columns from dataframe where ALL values are NA
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160
Try this:
df <- df[,colSums(is.na(df))<nrow(df)]
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Elasticsearch query to return all records
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I think lucene syntax is supported so:
http://localhost:9200/foo/_search?pretty=true&q=*:*
size defaults to 10, so you may also need &size=BIGNUMBER to get more than 10 items. (where BIGNUMBER equals a number you believe is bigger than your dataset)
BUT, elasticsearch docu...
How can I get the corresponding table header (th) from a table cell (td)?
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answered Aug 19 '10 at 16:13
user113716user113716
291k5959 gold badges425425 silver badges431431 bronze badges
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What is the equivalent of the C++ Pair in Java?
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404
In a thread on comp.lang.java.help, Hunter Gratzner gives some arguments against the presence o...
Apk location in New Android Studio
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Note: this is will become deprecated sometimes around 1.0
Eclipse
If you are importing Android Eclipse project directly, do not do this!
As soon as you have dependencies in your project (jars or Library Projects), this will not work and your project will not be properly setup.
I...
Remove white space below image [duplicate]
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answered Oct 15 '11 at 0:21
robertcrobertc
67.4k1818 gold badges179179 silver badges166166 bronze badges
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Get HTML5 localStorage keys
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in ES2017 you can use:
Object.entries(localStorage)
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Unexpected value from nativeGetEnabledTags: 0
I installed the latest version of the SDK (r21) and ADT 21.0.0. I tried simple code, and it works well, but now I get a warning in LogCat that did not appear in the previous versions:
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Android ADB device offline, can't issue commands
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140
I just got the same problem today after my Nexus 7 and Galaxy Nexus were updated to Android 4.2....
Asking the user for input until they give a valid response
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+750
The simplest way to accomplish this is to put the input method in a while loop. Use continue when you get bad input, and break out of ...