I have an array like below
let formulaArray = ["(", "(", "(", "2", "+", "3", ")", "*", "3", ")", "+", "(", "12", "/",{}]
}
json object in an array can be at any index.Now,I want to find the index of json object ,how can i do that?
2 Answers
Use .forEach() and then check the object with typeof operator, if true, then push it to an array
var formulaArray = ["(",{}, "(", "(", "2", "+", "3", ")", "*", "3", ")", "+", "(", "12", "/",null,{}]
var objectIndex = [];
formulaArray && formulaArray.forEach(function(item, index){
typeof item==='object' && item!==null &&
objectIndex.push(index);
})
console.log(objectIndex)5 Comments
Nick Parsons
I think you should return
typeof item === 'object' && item !== null instead because if the item in the array is null it will use that as the index
Alvin Theodora
I have added
formulaArray && to check if the array is nullAlvin Theodora
Oh, got it, I misunderstood what you meant, thanks
valli
Thank You! but this is not working for number of objects,it is returning only the index for the first object
Alvin Theodora
I have edited the code, now it finds all index and push it to an array
Please check out this SO answer 👇 https://stackoverflow.com/a/36419269/3902739
It defines the correct structure of an array of Json objects and uses JavaScript functions such as Array.find or Array.forEach or Array.filter as clearly explained in the example provided.
Hope this helps!
{}?