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# operator_add: Concatenate Two Character Vectors

## Description

Binary operators for joining (concatenating) two character vectors, with a typical R look-and-feel.

## Usage

    e1 %s+% e2

    e1 %stri+% e2

## Arguments

`e1` | a character vector or an object coercible to a character vector
`e2` | a character vector or an object coercible to a character vector

## Details

Vectorized over `e1` and `e2`.

These operators act like a call to `stri_join(e1, e2, sep='')`. However, note that joining 3 vectors, e.g., `e1 %s+% e2 %s+% e3` is slower than `stri_join(e1, e2, e3, sep='')`, because it creates a new (temporary) result vector each time the operator is applied.

## Value

Returns a character vector.

## Author(s)

Marek Gagolewski and other contributors

## See Also

The official online manual of stringi at https://stringi.gagolewski.com/

Gagolewski M., stringi: Fast and portable character string processing in R, Journal of Statistical Software 103(2), 2022, 1-59, doi:10.18637/jss.v103.i02

Other join: `stri_dup()`, `stri_flatten()`, `stri_join()`, `stri_join_list()`

## Examples

    c('abc', '123', 'xy') %s+% letters[1:6]
    ## [1] "abca" "123b" "xyc"  "abcd" "123e" "xyf"
    'ID_' %s+% 1:5
    ## [1] "ID_1" "ID_2" "ID_3" "ID_4" "ID_5"