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Pop from front of process queue (proc_queue_pop_front)

Declaration​

value = proc_queue_pop_front(key)

Parameters​

  • key
    String.

Returns​

  • value
    String. The popped value. If the queue does not exist or is empty, returns empty string.

Notes​

  • This function is equivalent to proc_queue_pop.
  • All process queues whose names start with "xxtouch." or "1ferver." are preserved.
  • Pop a value from the front.

Example​

local billno = proc_queue_pop_front("billnos")
if billno ~= "" then
    print(billno)
else
    print("no bill")
end