Adding dequeue

Author: vtrbtf

Classical/data-structures/dequeue/shell/dequeue.sh

@@ -0,0 +1,27 @@
+#!/bin/bash
+
+items=()
+while true ; do
+	echo "... "
+	read -r line
+	args=($line)
+	case ${args[0]} in 
+		"FADD")
+			arg_list=(${args[1]})
+			arg_list+=${items[@]}
+			items=$arg_list
+			;;
+		"RADD")
+			items+=(${args[1]})
+			;;
+		"FPOP")
+			echo "${items[0]}"
+			items=${items[@]:1}
+			;;
+		"RPOP") 
+			echo "${items[-1]}"
+			items=${items[@]:0:$((${#items[@]} - 1))}
+			;;
+	esac
+			
+done