Forum Discussion

SK07's avatar
SK07
Contributor
6 years ago

Groovy- count all nulls in an array

I want to print  how many nulls, 1's and 2's seperately. Json : {"prods": [{"Item":13,"rate":200, "Ids": []}, {"Item":13,"rate":200, "Ids": []},  {"Item":11,"rate": 100, "Ids": [ {"level": 1}]},  ...
aaronpliu's avatar
aaronpliu
Frequent Contributor
6 years ago

Hi SK07,

 

I believe you should can get solution from scripts which I replied to you in your previous topic, right?

 

firstly, you should parse json string as a json object, right? you should do this at first step.

secondly, retrieve 'Ids' and get content. (if "Ids" 's value is always like []. if not, you can add a 'if' condition to determine, like: if(a instanceof ArrayList),    a means Ids' value)

thirdly, you also get all values of Ids, so you can count the numer of them.

 

If any enquires, please post your questions here

 

Regards,

/Aaron

  • SK07's avatar
    SK07
    Contributor
    6 years ago

    Hi Aaron, This is something different from previous with inner loops.

    Json : {"prods": [{"Item":13,"rate":200, "Ids": []},
                              {"Item":14,"rate":300, "Ids": []},
                              {"Item":15,"rate":100, "Ids": [ {"level": 1}]},
                              {"Item":16,"rate":700, "Ids": [ {"level": 1}]},
                              {"Item":17,"rate":500, "Ids": [ {"level": 2} ], [{"level": 2}, {"level": 2}]} ]}.

    So, I retrieve the Ids as below:

    def jsonids = json.Ids
    log.info jsonids
    [[], [], [1], [1], [2, 2, 2]]

    But I dont how to read/count the above and get the results like below:

    Ids [] =: 2, Level 1 =  2, Level 2 = 3

    • aaronpliu's avatar
      aaronpliu
      Frequent Contributor
      6 years ago

      Hi SK07,

       

      Dont think of it to be complex. If you only wanna count the number of "[]", try

      // your list aa=[[], [], [1,1],[2,2,2]]
def num = 0
for(item in aa){
    if(item.size() < 1) num++
}
log.info "[Ids []: $num]"

       

      Regards,

      /Aaron

      • SK07's avatar
        SK07
        Contributor
        6 years ago

        Thank you! Aaron.