regex - 使用模式分割字符串

Question

初始向量为

"WhiteRiver"   "microProcess" "PartsUnknown" "RedSox"

如何将其拆分为

White"   "River"   "micro"   "Process" "Parts"   "Unknown" "Red"  "Sox"

规则是区分大小写。

Answer 1

如果v1是向量

unlist(strsplit(v1, "(?<=[a-z])(?=[A-Z])", perl=TRUE))
#[1] "White"   "River"   "micro"   "Process" "Parts"   "Unknown" "Red"    
#[8] "Sox"    

(?<=[a-z])向后查找小写字母

(?=[A-Z])向前查找大写字母