Easy JavaScript - Crawling Nested JSON with Recursive Function (57)

This tutorial is pretty simple: Search a Nested JSON using a Recursive Function. Recursion in JavaScript is a very useful method to know.

The goal is to find a value when we know the key BUT we don't know the structure. So we use a simple recursive function to loop through an array of JSON objects and find the value we need.

#EasyJavaScript #JavaScriptTutorial #EasyProgramming

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[vengateshwaran]

thank u so much was the video i looked

[kalaakaaram]

Great tutorial, can you please explain more how it works

[shankargokul]

Great video. How can we extend that to autocomplete by user input where cities names are shown as suggestions when user inputs

[pepijn]

great, but what you can also do is use Object.keys(obj) to always convert data object to an array and just use forEach to iterate over the keys in stead of for in in combination with filter, that will also work for objects as well as arrays

[NikicaVaradi]

Nice for depth-first search. How would you implement the breadth-first search?

[ericzorn]

Great tutorial. Just one thing, I’m sure you are aware that type of array is also equal to object. You have to handle that edge case as well. also, instead of using filter which returns an array based on your filter case, use a for each or for of loop.

[draganbogdan]

Could you make a tutorial to explain how this works and why is works, with exemples on how the function calls itself ?

[adamabdullah]

Nice tutorial. How to modify some data and return full of array. Ex. From [{name:"one", to [{name:"two", children:"[{nameChil:"two"]}] . So we modify some data and return it but with full array. Sorry for bad english. Thank you so much for the video..

[bonnefe]

how can you best load a json file to make it work properly in your script?

[akai]

what if your city was inside a JSON array? say quadrant is a JSON array and has multiple cities will this still work. May be dumb question but does obj[prop]=="object" evaluate true for a nested JSON array?

[keremilhan]

Hello, I am doing the exact same thing but I am getting an error. Please help me.
Error is like this "prop' is not defined no-undef"

[suryakiransuravarapu]

Hi Naumus, i'm facing one issue while parsing one of my json .! would you be able to help me please

[manojtiwari]

after doing this how to insert inot the table when i am trying it will override pls help if you know

[danbuild]

Excellent tutorial.
I found though that I had to initialize the data.filter after the function, by moving that function below the iterateObject function in order for the code to work.
I am using a atom-live-server plugin with the Atom IDE.

[jeyraj]

Nice Tutorial.. How to return array of object from the above example? Ex. [{name:"", city:"", name:"", city:""}]

[bhojakrahul]

Why used filter first I don't get it sir...