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Subset of rows containing NA (missing) values in a chosen column of a data frame
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Could you explain why this works, what this does etc.?
– csilk
Nov 22 '17 at 0:19
new_DF<...
Execute a command line binary with Node.js
...s well documented in the documentation (v5.0.0). To execute a command and fetch its complete output as a buffer, use child_process.exec:
var exec = require('child_process').exec;
var cmd = 'prince -v builds/pdf/book.html -o builds/pdf/book.pdf';
exec(cmd, function(error, stdout, stderr) {
// com...
BasicHttpBinding vs WsHttpBinding vs WebHttpBinding
... or you could do something more advanced which leverages OAuth/STS tokens, etc.
– BrainSlugs83
Oct 21 '12 at 6:01
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How do I wait for an asynchronously dispatched block to finish?
...ate (eg callbacks/delegate protocols, being available, going away, errors, etc.). (These can be refactored into blocks if you don't like callback hell.) Because this is how to expose real behavior to the rest of the app than hide it behind a false façade.
Instead, use NSNotificationCenter, defin...
Android EditText delete(backspace) key event
...xtWatcher);
I hope it works on another android devices too (samsung, LG, etc).
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How to determine day of week by passing specific date?
...age for translation, and (2) cultural norms for abbreviation, punctuation, etc.
)
Tue
See this code run live at IdeOne.com (but only Locale.US works there).
java.time
See my example code above, and see the correct Answer for java.time by Przemek.
Ordinal number
if just the da...
How long do browsers cache HTTP 301s?
...is directed back to a same URL a second time during a redirect, it should fetch it from the origin again instead of redirecting again from cache, in an attempt to avoid a redirect loop. Comments on this answer indicate this now works in all major browsers - but there may be some minor browsers wher...
Why are Docker container images so large?
...minimum, any file manipulation like install, moving, extracting, removing, etc, should ideally be made under a single RUN instruction
FROM fedora:latest
RUN yum -y install nano git && yum -y clean all
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How to disable text selection highlighting
...r anchors that act like buttons (for example Questions , Tags , Users , etc. which are located on the top of the Stack Overflow page) or tabs, is there a CSS standard way to disable the highlighting effect if the user accidentally selects the text?
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Remove empty elements from an array in Javascript
...t even simpler arr.filter(e=>e) and this can be chained by map, reduce, etc.
– Sheepy
Feb 9 '15 at 4:32
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