Loop over complex array structures with best practice and lowest complexity

Question

I am calling an API that returns

 [{
        Id:string,
        Value:string,
        Value2: 
          [{Id:string,Value3:string}] ,
 {
        Id:string,
        Value:string,
        Value2: 
          [{Id:string,Value3:string}] 
 }]

How do i loop over value 2 with lowest complexity and best approach in JS

godo57 · Answer 1 · 2021-11-18T15:30:52.153

0

I am not sure i understand your issue but you can simply map over your table items like that (assuming a variable called table holds your data):

table.map((item) => {
  console.log(JSON.stringify(item.Value2))
})

And if you want to loop over the values of Value2:

table.map((item) => {
  item.Value2.map((subitem) => {
    console.log(subitem.Value3)
  })
})

edited Nov 18 '21 at 15:30

answered Nov 18 '21 at 15:24

godo57

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Side note: use `forEach` for those examples (https://stackoverflow.com/q/34426458/1225328). – sp00m Nov 18 '21 at 15:34
@sp00m yes you're right if the original poster does need to log the value. But since I am not sure about the expected operation, I let .map() to be sure – godo57 Nov 18 '21 at 15:39
Two loops inside each other isn't the best practice – Mohamed Fawzy Nov 18 '21 at 19:54
So you have to denormalize your data structure before – godo57 Nov 22 '21 at 13:49

Loop over complex array structures with best practice and lowest complexity

1 Answers1