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  1. abc <- "{\"left\":\"foo\",\"right\":\"no\"},\"answer\":\"left\",\"Id\":258}\""
  2. abb <- "{\"left\":\"foo\",\"up\":\"no\"},\"answer\":\"updownupdwon\",\"Id\":258}\""
  3. df <- data.frame(col=c(abb,abc))
  4. df$pos <- as.numeric(sub(".*Id\":(\\d+)}.*", "\\1", df$col))
  5. df
Success #stdin #stdout 0.21s 39612KB
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stdin
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Standard input is empty
stdout
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                                                          col pos
1 {"left":"foo","up":"no"},"answer":"updownupdwon","Id":258}" 258
2      {"left":"foo","right":"no"},"answer":"left","Id":258}" 258
https://ideone.com/WYbzjX
language:
R (R 3.5.2)
created:
7 years ago
visibility:
public

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