Pop steps from the pipeline — pipe_pop

Use this function to drop steps from the end of the pipeline.

Usage

pipe_pop_step(pip)

pipe_pop_steps_after(pip, step)

pipe_pop_steps_from(pip, step)

Arguments

pip: Pipeline object
step: string name of step

Value

string the name of the step that was removed

Methods

pipe_pop_step: drop last step from the pipeline
pipe_pop_steps_after: drop all steps after given steps
pipe_pop_steps_from: drop all steps from and including given steps

Examples

# pipe_pop_step
p <- pipe_new("pipe", data = 1:2)
pipe_add(p, "f1", \(x = 1) x)
pipe_add(p, "f2", \(y = 1) y)
p
#>      step depends    out keepOut  group  state
#>    <char>  <list> <list>  <lgcl> <char> <char>
#> 1:   data         [NULL]   FALSE   data    New
#> 2:     f1         [NULL]   FALSE     f1    New
#> 3:     f2         [NULL]   FALSE     f2    New
pipe_pop_step(p)
#> [1] "f2"
p
#>      step depends    out keepOut  group  state
#>    <char>  <list> <list>  <lgcl> <char> <char>
#> 1:   data         [NULL]   FALSE   data    New
#> 2:     f1         [NULL]   FALSE     f1    New

# pipe_pop_steps_after
pipe_add(p, "f2", \(y = 1) y)
pipe_add(p, "f3", \(z = 1) z)
p
#>      step depends    out keepOut  group  state
#>    <char>  <list> <list>  <lgcl> <char> <char>
#> 1:   data         [NULL]   FALSE   data    New
#> 2:     f1         [NULL]   FALSE     f1    New
#> 3:     f2         [NULL]   FALSE     f2    New
#> 4:     f3         [NULL]   FALSE     f3    New
pipe_pop_steps_after(p, "f1")
#> [1] "f2" "f3"
p
#>      step depends    out keepOut  group  state
#>    <char>  <list> <list>  <lgcl> <char> <char>
#> 1:   data         [NULL]   FALSE   data    New
#> 2:     f1         [NULL]   FALSE     f1    New

# pipe_pop_steps_from
pipe_add(p, "f2", \(y = 1) y)
pipe_add(p, "f3", \(z = 1) z)
p
#>      step depends    out keepOut  group  state
#>    <char>  <list> <list>  <lgcl> <char> <char>
#> 1:   data         [NULL]   FALSE   data    New
#> 2:     f1         [NULL]   FALSE     f1    New
#> 3:     f2         [NULL]   FALSE     f2    New
#> 4:     f3         [NULL]   FALSE     f3    New
pipe_pop_steps_from(p, "f1")
#> [1] "f1" "f2" "f3"
p
#>      step depends    out keepOut  group  state
#>    <char>  <list> <list>  <lgcl> <char> <char>
#> 1:   data         [NULL]   FALSE   data    New