Setting the Scene个
我有这个字符串:
string <- "Apples/Bananas/Grapes/"
我正在try 查找与此列表匹配的所有可能的子字符串:
pattern <- "Apples/Bananas/|Bananas/Grapes/|Grapes/|Grapes/Pears/"
预期输出为:
"Apples/Bananas/" "Bananas/Grapes/" "Grapes/"
What I have tried个
我try 使用了str_EXTRACT_ALL:
matches <- str_extract_all(string, pattern)
但我只得到了
"Apples/Bananas/" "Grapes/"
为什么它不返回"香蕉/葡萄/"?