Question

I have some JSON which looks generally like this…

{"appJSON": [
{
"title":"Application Title",
"category":"Business", 
"industry":"Retail", 
"language":"English", 
"tags":[
        {"tags":"Sales"},{"tags":"Reporting"},{"tags":"Transportation"},{"tags":"Hospitality"}
       ], 
},
{
"title":"Airline Quality Assurance",
...
...
...]}

I’m looping through JSON to get an array of all of the unique Tags in the data.

My question is, now that I have an array of the different unique Tags in the JSON, how do I best determine the number of times each Tag occurs?

So basically I’m looking to generate a list of all of the tags found in the JSON (which I already have) with the number of times each one occurs (which I don’t already have).

Thanks a lot in advance!

Answer 1

I’m assuming when you find a new tag you check to see if you already have that tag somewhere. If you don’t you add it to your list. Why not when you check do something like.

var nextTag=//get the next tag in the JSON list
var newTag=true;
for(var i=0;i<tags.length;i++){
  if(nextTag === tags[i]){
    tagCount[i]++;
    newTag=false;
    break;
  }
}
if(newTag){
  tags[tags.length]=nextTag;
  tagCount[tagCount.length]=1;
}

This uses two arrays where tagCount[i] is the number of times tag in tags[i] occurs. You could uses an object to do this or however you wanted to.