Javascript/jQuery search json for a string then run a function

Question

I need to run a function matchFound() if a string is found in an external json file.

This is what I have so far:

function init(){
   $.ajax({
      type: "GET",
      url: "http://ajax.googleapis.com/ajax/services/feed/load?v=1.0&num=50&callback=?&q=http://www.domain.com/feed.rss",
      dataType: "json",
      success: parseData
   });
}

function parseData(data){
var string_to_find = "Hello World!";
  // look into the data and match the string
}

function matchFound(str, string_to_find){
    alert('Match found in string - '+ str +'\r\n While looking for the string- '+ string_to_find);
    return true;
}

function matchNotFound(){
    alert('No Match found!');   
}

But I don't know how to parse the Json data and search for a string.

I have this for XML (thanks @Ohgodwhy) but not sure how to translate for json

function parseXml(xml){
    var string_to_find = "Hello World!";
    $(xml).find('title').each(function(){
        var str = $(this).text();
        if(str.indexOf(string_to_find) > -1){
            if(matchFound(str, string_to_find)){
                return false;   
            }
        }

    });
}

The search location within the variables is: responceData > feed > entries > [0] or 1 or [2] etc > contentSnippet

I only need to match the first 10 characters.

If a match is found then run the funciton matchFound() or if not found run the function matchNotFound()

Any help with this is very much appreciated.

C

enter image description here

Anup Singh · Accepted Answer · 2014-02-22 20:13:33Z

1

you have to iterate json recursively and then search for the string

function parseData(data){
var string_to_find = "Hello World!";
var is_found = iterate(data , string_to_find);
if(is_found === true){
      matchFound(JSON.stringify(data), string_to_find);
}else{
      matchNotFound(string_to_find);
}
  // look into the data and match the string
}

    function iterate(obj , string_to_find) {
    for(var key in obj) { // iterate, `key` is the property key
        var elem = obj[key]; // `obj[key]` is the value
         console.log(elem, string_to_find);
        if(typeof(elem)=="string" && elem.indexOf(string_to_find)!==-1) { 

            return true;
        }

        if(typeof elem === "object") { // is an object (plain object or array),
                                       // so contains children
           return iterate(elem , string_to_find); // call recursively
        }
    }
}

edited Feb 22, 2014 at 20:13

answered Feb 22, 2014 at 19:35

Anup Singh

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8 Comments

Cybercampbell Over a year ago

Thanks so much. Should var is_found = iterate(obj , string_to_find); be var is_found = iterate(data , string_to_find); ?

Cybercampbell Over a year ago

This is looking in title right? how do I look in responceData > feed > entries > [0] or [1] or [2] etc > contentSnippet

Cybercampbell Over a year ago

I need to loop through entries in the variable contentSnippet can that be done?

Anup Singh Over a year ago

in that case you just have to remove the condition '"key === "title"' & write if(typeof(obj[key]) === "string" && obj[key].indexOf(string_to_find)!==-1)

Cybercampbell Over a year ago

Thanks... I always get 'No Match found!' even though the string is difinitely in json file. any ideas? I have exactly what your posted.

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