Wait a Number of Signals

These bricks encapsulate n stops: wait for a sequence of n signals. wait_until also traps and untraps the required signals.

Usage

wait_n(.trj, n = 1)

wait_until(.trj, signals, n = 1)

Arguments

.trj

the trajectory object.

n

number of wait activities to chain.

signals

signal or list of signals, accepts either a string, a list of strings or a callable object (a function) which must return a string or a list of strings.

Value

wait_n returns n times wait. wait_until also adds trap and untrap at the beginning and end, respectively, of the chain of waits (see examples below).

Examples

## These are equivalent:
trajectory() %>%
  wait_n(3)
#> trajectory: anonymous, 3 activities
#> { Activity: Wait         |  }
#> { Activity: Wait         |  }
#> { Activity: Wait         |  }

trajectory() %>%
  wait() %>%
  wait() %>%
  wait()
#> trajectory: anonymous, 3 activities
#> { Activity: Wait         |  }
#> { Activity: Wait         |  }
#> { Activity: Wait         |  }

## These are equivalent:
trajectory() %>%
  wait_until("green")
#> trajectory: anonymous, 3 activities
#> { Activity: Trap         | signals: [green] }
#> { Activity: Wait         |  }
#> { Activity: UnTrap       | signals: [green] }

trajectory() %>%
  trap("green") %>%
  wait() %>%
  untrap("green")
#> trajectory: anonymous, 3 activities
#> { Activity: Trap         | signals: [green] }
#> { Activity: Wait         |  }
#> { Activity: UnTrap       | signals: [green] }

## These are equivalent:
trajectory() %>%
  wait_until(c("one", "another"), 2)
#> trajectory: anonymous, 4 activities
#> { Activity: Trap         | signals: [one, another] }
#> { Activity: Wait         |  }
#> { Activity: Wait         |  }
#> { Activity: UnTrap       | signals: [one, another] }

trajectory() %>%
  trap(c("one", "another")) %>%
  wait() %>%
  wait() %>%
  untrap(c("one", "another"))
#> trajectory: anonymous, 4 activities
#> { Activity: Trap         | signals: [one, another] }
#> { Activity: Wait         |  }
#> { Activity: Wait         |  }
#> { Activity: UnTrap       | signals: [one, another] }