Question

我有一个字符串

string <- "You know that song Mary had a little lamb? Mary is my friend."

我想将它拆分为

> string[1]
[1] "You know that song "
> string[2]
[1] " had a little lamb? Mary is my friend."

我想将它拆分为“Mary”的第一个实例。

更接近我的实际问题，假设我有以下字符串：

string <- "Name:      Mary
           Some stuff about Mary goes here, for a page
           Name:      Mary
           There's more stuff about her.
           Name:      Sue
           Now the name is different. I want to split on Sue here.
           Name:      Sue
           Sue appears again, but because the name is Sue again I don't want to splt.
           Name:      Beth
           The name changed again, so I want to split on Beth above (following Name: ).
           Name:      Amy
           The name changed again and now I want to split on the 'Amy' immediately following Name: ."

基本上，我想拆分此文档，以便每个元素对应于一个人的信息，以便：

> string
[1] "Name:      Mary\n               Some stuff about Mary goes here, for a page\n               Name:      Mary\n               There's more stuff about her.\n               Name:      "                                            
[2] "Sue\n               Now the name is different. I want to split on Sue here.\n               Name:      Sue\n               Sue appears again, but because the name is Sue again I don't want to splt.\n               Name:      "
[3] "Beth\n               The name changed again, so I want to split on Beth above (following Name: ).\n               Name:      "                                                                                                    
[4] "Amy\n               The name changed again and now I want to split on the 'Amy' immediately following Name: ."

Answer 1

可能有帮助

string1 <- "You know that song Mary had a little lamb? Mary is my friend and she is also a friend of another friend"
strsplit(string1, '(\\b\\S+\\b)(?=.*\\b\\1\\b.*)', perl=TRUE)[[1]]
#[1] "You know that song " " had "               " little lamb? Mary "
#[4] " my "                " and she is also a " " of another friend"

另一个案例

$(".toggle").hide();

$(".cancel, .contact").click(function() {
    $(".toggle").slideToggle("slow");
    $(".buttons").toggle();
});

注意：我不确定这是否是OP希望为第二个例子分割的方式。

Answer 2

试试这个：

regmatches(string, regexpr("Mary", string), invert = TRUE)

通过模式R的第一个实例拆分字符串

2 个答案: