This is a companion to `append()`

to help merging two
lists or atomic vectors. `prepend()`

is a clearer semantic
signal than `c()`

that a vector is to be merged at the beginning of
another, especially in a pipe chain.

prepend(x, values, before = 1)

x | the vector to be modified. |
---|---|

values | to be included in the modified vector. |

before | a subscript, before which the values are to be appended. |

A merged vector.

x <- as.list(1:3) x %>% append("a")#> [[1]] #> [1] 1 #> #> [[2]] #> [1] 2 #> #> [[3]] #> [1] 3 #> #> [[4]] #> [1] "a" #>x %>% prepend("a")#> [[1]] #> [1] "a" #> #> [[2]] #> [1] 1 #> #> [[3]] #> [1] 2 #> #> [[4]] #> [1] 3 #>x %>% prepend(list("a", "b"), before = 3)#> [[1]] #> [1] 1 #> #> [[2]] #> [1] 2 #> #> [[3]] #> [1] "a" #> #> [[4]] #> [1] "b" #> #> [[5]] #> [1] 3 #>