title: How do I iterate over a JSON array in Golang?
body: <p>I am trying to decode a JSON array and put it in a slice of a struct. I've read how to do this, but only if the JSON array contains keys. My JSON array does not contain keys. </p>
  
  <p>I have stripped the program down to only the part where it handles the JSON data. It compiles and can be found below. </p>
  
  <pre><code>package main
  
  // 2014-04-19
  
  import (
      "fmt"
      "encoding/json"
  )
  
  type itemdata struct {
      data1 int // I have tried making these strings
      data2 int
      data3 int
  }
  
  func main() {
      datas := []itemdata{}
  
      json.Unmarshal([]byte(`[["7293","1434","99646"],["4657","1051","23795"]]`), &amp;datas)
      // I have tried the JSON string without the qoutes around the numbers
      fmt.Println(len(datas)) // This prints '2'
      fmt.Println("This prints") // This does print 
      for i := range datas {
          fmt.Println(datas[i].data1)  // This prints '0', two times 
      }
      fmt.Println("And so does this") // This does print
  }
  </code></pre>
  
  <p>I've searched for things like 'Go Lang JSON decode without keys' and read articles (and 'package pages') on the Go Lang website. I can find enough information on how to work with Go and JSON, but none of my found articles explain how to do it without keys in the JSON array. </p>
  
  <p>I wouldn't find it odd if I would get an error; The JSON values are stringy-numbers (that's how I get them as input), but I am trying to put them in integers. I am not getting an error though. I have tried making the values in the 'itemdata' struct strings, that didn't help much. Removing the quotes from the JSON values didn't help either. </p>
  
  <p>I would like to know how I can make my JSON array in a slice of 'itemdata'. The first out of three values would go into 'itemdata.data1', the second in 'itemdata.data2' and the third in 'itemdata.data3'.</p>
  
  <p>Please let me know if you think I can improve my question. </p>
  
  <p>Thanks in advance,<br>
  Remi</p>