Search in Json for string

Question

I would like to look for certain values in my Json.

Search for the type "patientSize" and find the value of the "coveredText".

Actually, the console throws out found:[]

Since I have to perform some searches, I am looking for a fast and high-performance possibility. Thank you for your tips.

Example JSON

{
"annoDs": [
     {
        "begin": 512,
        "end": 518,
        "type": "patientSize",
        "coveredText": "183 cm",
        "additionalParameters": {
            "unit": "Zentimeter",
            "value": "183"
        }

    }
]

}

JS

var data = JSON.parse(retrievedAnnotation);
setTimeout(function() {

function getAge(code) {
  return data.annoDs.filter(
      function(data){
        return data.code == code;
        }
  );
}

var found = getAge('patientSize');
console.log("found:", found);
}, 50);

code !== type

Andreas
– Andreas

2016-11-26 14:48:43 +00:00
Commented Nov 26, 2016 at 14:48 — Andreas
– Andreas, Commented Nov 26, 2016 at 14:48

IzumiSy · Accepted Answer · 2016-11-26 15:13:14Z

2

The function getAge must be like this

function getAge(code) {
  return data.annoDs.filter(function(data) {
    return data.type === code;
  }
}

UPDATE

You can use map to to get an array of coverdText

function getAge(code) {
  return data.annoDs
    .filter((data) => data.type === code)
    .map((e) => e.coveredText);
}

edited Nov 26, 2016 at 15:13

answered Nov 26, 2016 at 14:56

IzumiSy

1,51810 silver badges20 bronze badges

Sign up to request clarification or add additional context in comments.

3 Comments

mm1975 Over a year ago

Thank you IzumiSy!

mm1975 Over a year ago

One more question. Now I find the object, but how can I get the value of the "coveredText"? Thanks!

mm1975 Over a year ago

Thank you, my IDE (Aptana) throws a "unexpected token"-issue for the => . But the code works

marcan2020 · Accepted Answer · 2016-11-26 15:10:33Z

0

The problem is that you are searching for the property "code" of each element in annoDs.

You have:

data.code == code; // undefined != 'patientSize'

You should have:

function getAge(code) {
    return data.annoDs.filter(
        function(data){
            return data.type == code;
        }
    );
}

var found = getAge('patientSize');
found.forEach(el => console.log(el.coveredText));

Note that filter will return every element the matching the condition. You should use find if you know that there's only one object matching the condition, because it will return the first element matching the condition.

answered Nov 26, 2016 at 15:10

marcan2020

6096 silver badges14 bronze badges

Collectives™ on Stack Overflow

Search in Json for string

2 Answers 2

3 Comments

Comments

Your Answer

Hot Network Questions

Collectives™ on Stack Overflow

2 Answers 2

3 Comments

Comments

Your Answer

Sign up or log in

Post as a guest

Related