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Split column at delimiter in data frame [duplicate]
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@Taesung Shin is right, but then just some more magic to make it into a data.frame.
I added a "x|y" line to avoid ambiguities:
df <- data.frame(ID=11:13, FOO=c('a|b','b|c','x|y'))
foo <- data.frame(do.call('rbind', strsplit(as.character(df$FOO),'|',fixed=TRUE))...
When should one use a spinlock instead of mutex?
...and if the lock is held for a longer amount of time, this will waste a lot more CPU time and it would have been much better if the thread was sleeping instead.
The Solution
Using spinlocks on a single-core/single-CPU system makes usually no sense, since as long as the spinlock polling is blocking ...
How to write a switch statement in Ruby
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thanks for this! this is more elegant than my solution which was to use "case obj.class.to_s"
– Russell Fulton
Jul 23 at 3:22
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How to size an Android view based on its parent's dimensions
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How do I get the APK of an installed app without root access?
... the APK, use adb shell pm path your-package-name. See this question for a more detailed answer stackoverflow.com/questions/4032960/…
– Yojimbo
Sep 10 '13 at 3:43
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Correct way to detach from a container without stopping it
...mon stop the container until a new process is launched (via docker start) (More explanation on the matter http://phusion.github.io/baseimage-docker/#intro)
If you want a container that run in detached mode all the time, i suggest you use
docker run -d foo
With an ssh server on the container. (ea...
Shortest distance between a point and a line segment
...t(distToSegmentSquared(p, v, w)); }
EDIT 2: I needed a Java version, but more important, I needed it in 3d instead of 2d.
float dist_to_segment_squared(float px, float py, float pz, float lx1, float ly1, float lz1, float lx2, float ly2, float lz2) {
float line_dist = dist_sq(lx1, ly1, lz1, lx2,...
How do I set/unset a cookie with jQuery?
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It's 2015 and we are still receiving more than 2k unique hits per week in jquery-cookie repository just from this answer. A couple of things we can learn from that: 1. cookies are not going to die soon and 2. People still google for a "jquery plugin to save the ...
What's the difference between CENTER_INSIDE and FIT_CENTER scale types?
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it sounds that FIT_CENTER is (almost) always more favorable.
– cheng yang
Mar 5 '13 at 21:48
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