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Split delimited strings in a column and insert as new rows [duplicate]
... of doing it..
df <- read.table(textConnection("1|a,b,c\n2|a,c\n3|b,d\n4|e,f"), header = F, sep = "|", stringsAsFactors = F)
df
## V1 V2
## 1 1 a,b,c
## 2 2 a,c
## 3 3 b,d
## 4 4 e,f
s <- strsplit(df$V2, split = ",")
data.frame(V1 = rep(df$V1, sapply(s, length)), V2 = unlist(...
How do I serialize an object and save it to a file in Android?
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answered Nov 7 '10 at 17:54
RalkieRalkie
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Using git repository as a database backend
... 20 GiB │
│ en.wikipedia │ 21.5M │ 133K/month │ 3 TiB │ 44 GiB │
│ OSM │ 1.7M │ 21K/month │ 726 GiB │ 480 GiB │
Obviously, for that amounts of data/activity, this approach would be utterly unacceptable.
Generally, it would have worked, if one could u...
How to read the output from git diff?
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497
Lets take a look at example advanced diff from git history (in commit 1088261f in git.git repo...
Elevating process privilege programmatically?
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174
You can indicate the new process should be started with elevated permissions by setting the Verb...
Efficient way to rotate a list in python
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answered Jan 27 '10 at 20:46
Ignacio Vazquez-AbramsIgnacio Vazquez-Abrams
667k127127 gold badges11911191 silver badges12501250 bronze badges
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How to filter a dictionary according to an arbitrary condition function?
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434
Nowadays, in Python 2.7 and up, you can use a dict comprehension:
{k: v for k, v in points.it...
Scrolling a flexbox with overflowing content
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K-Gun
9,39422 gold badges4444 silver badges5353 bronze badges
answered Feb 4 '14 at 0:59
Joseph SilberJoseph Si...
Difference between del, remove and pop on lists
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1423
The effects of the three different methods to remove an element from a list:
remove removes th...
HTML5 input type range show range value
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edited Jul 1 '16 at 2:24
Alfonso Carrasco
11555 bronze badges
answered Apr 4 '12 at 4:19
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