Question

我有这种形式的字符串

"[1425]", "[[12545]]", "2423", "((125))", "[[[1543]]]", "(1432)"

我尝试了link中的解决方案，但它不适合这种情况。我需要

"[1425]", "[12545]", "2423", "(125)", "[1543]", "(1432)"

即。删除存在的多个括号。

Answer 1

尝试：

library(stringr)
v1 <- c("[1425]", "[[12545]]", "2423", "((125))", "[[[1543]]]", "(1432)")

str_extract(v1, "\\D?[0-9]+\\D?")
#[1] "[1425]"  "[12545]" "2423"    "(125)"   "[1543]"  "(1432)"

Answer 2

最难以理解的答案是：

x <- c("[1425]", "[[12545]]", "2423", "((125))", "[[[1543]]]", "(1432)")
gsub("(\\[|\\]|\\(|\\))\\1+","\\1",x)
#[1] "[1425]"  "[12545]" "2423"    "(125)"   "[1543]"  "(1432)"

仅删除多个括号

2 个答案: