R: Concatenate Strings in a List

stri_join_list {stringi} | R Documentation

## Concatenate Strings in a List

### Description

These functions concatenate all the strings in each character vector in a given list. `stri_c_list` and `stri_paste_list` are aliases for `stri_join_list`.

### Usage

    stri_join_list(x, sep = "", collapse = NULL)

    stri_c_list(x, sep = "", collapse = NULL)

    stri_paste_list(x, sep = "", collapse = NULL)

### Arguments

`x` | a list consisting of character vectors
`sep` | a single string; separates strings in each of the character vectors in `x`
`collapse` | a single string or `NULL`; an optional results separator

### Details

Unless `collapse` is `NULL`, the result will be a single string. Otherwise, you get a character vector of length equal to the length of `x`.

Vectors in `x` of length 0 are silently ignored.

If `collapse` or `sep` has length greater than 1, then only the first string will be used.

### Value

Returns a character vector.

### See Also

Other join: `%s+%()`, `stri_dup()`, `stri_flatten()`, `stri_join()`

### Examples

    stri_join_list(
       stri_extract_all_words(c("Lorem ipsum dolor sit amet.",
       "Spam spam bacon sausage and spam.")),
    sep=", ")

    stri_join_list(
       stri_extract_all_words(c("Lorem ipsum dolor sit amet.",
       "Spam spam bacon sausage and spam.")),
    sep=", ", collapse=". ")

    stri_join_list(
       stri_extract_all_regex(
          c("spam spam bacon", "123 456", "spam 789 sausage"), "\\p{L}+"
       ),
    sep=",")

    stri_join_list(
       stri_extract_all_regex(
          c("spam spam bacon", "123 456", "spam 789 sausage"), "\\p{L}+",
          omit_no_match=TRUE
       ),
    sep=",", collapse="; ")

[Package stringi version 1.4.6 Index]