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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 to securely save username/password (local)?
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edited May 23 '17 at 11:54
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answered Sep 30 '12 at 1:38
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Can you configure log4net in code instead of using a config file?
I understand why log4net uses app.config files for setting up logging - so you can easily change how information is logged without needing to recompile your code. But in my case I do not want to pack a app.config file with my executable. And I have no desire to modify my logging setup.
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Python: How would you save a simple settings/config file?
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194
Configuration files in python
There are several ways to do this depending on the file format re...
JavaScript: Class.method vs. Class.prototype.method
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edited Oct 28 '09 at 4:19
answered Oct 28 '09 at 4:08
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What's the false operator in C# good for?
...amp;&.
For example, look at this code (from http://ayende.com/blog/1574/nhibernate-criteria-api-operator-overloading - where I found out about this trick; archived version by @BiggsTRC):
public static AbstractCriterion operator &(AbstractCriterion lhs, AbstractCriterion rhs)
{
retur...
Which characters need to be escaped in HTML?
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4 Answers
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How does the const constructor actually work?
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4 Answers
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How do I limit the number of results returned from grep?
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249
The -m option is probably what you're looking for:
grep -m 10 PATTERN [FILE]
From man grep:
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Casperjs/PhantomJs vs Selenium
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184
They are attacking different problems. Since PhantomJS runs perfectly on the command-line, it is...