[Yaml-core] yaml data range

[joylix <jo...@12...>]

Dear all:
      How to I implement the variable assignment as follows:
inputData is in [ 9, 8, 7, 5 ]
var1= [ 93, 86, 74, 52 ]
outputData = var1[indexofInputData]
for example: 
when inputData=9, outputData= var1[0]=93
when inputData=7, outputData= var1[2]=74
How to implement this expression in yaml?
Thank you!