jQuery - get value from array object

Question

I have an array of object that looks like this:

var result = [{"id":"1", "price":"20.46"}, {"id":"2", "price":"40.00"}]

Right now I can access it like this:

result[0].price

But what I am trying to do is loop through the array of objects and compare the id to a user inputted id and return the matching value. So the index should be irrelevant.

I tried to loop through the array of objects, but I probably made some mistake and got nothing back.

var userinputid = 1;

result.forEach(function() {
    if (userinputid == result.id) {
        alert(result.price);
    }
);

How to solve this?

Nenad Vracar · Accepted Answer · 2016-08-17 22:50:36Z

10

Instead of result.id you should use currentElementInLoop.id

var result = [{"id":"1","price":"20.46"},{"id":"2","price":"40.00"}]
var userinputid = 1;

result.forEach(function(e) {
  if (userinputid == e.id) alert(e.price);
});

answered Aug 17, 2016 at 22:50

Nenad Vracar

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3 Comments

codenoob Over a year ago

you are right, this solved it. will accept when time runs out

jacqbus Over a year ago

yeah - that's better solution than my.

Nenad Vracar Over a year ago

@codenoob If your id's are unique its better to use find result.find((e) => e.id == userinputid).price; jsfiddle.net/Lg0wyt9u/1139

Sean Wang · Accepted Answer · 2016-08-17 22:49:01Z

1

You are missing a end brace. And you need to have the function use the element value parameter or the index parameter. Try

result.forEach(function (elementVal) {
    if (userinputid === elementVal.id){
        alert(elementVal.price);
    }
});

answered Aug 17, 2016 at 22:49

Sean Wang

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Comments

jacqbus · Accepted Answer · 2016-08-17 22:51:49Z

1

You forgot about index:

var result = [{"id":"1","price":"20.46"},{"id":"2","price":"40.00"}]
var userinputid = 1;

result.forEach(function(e, index){
  if(userinputid == result[index].id){
    alert(result[index].price);
  };
});

answered Aug 17, 2016 at 22:51

jacqbus

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Comments

user21186692 · Accepted Answer · 2023-02-10 11:08:09Z

0

use the element value parameter or the index parameter

result.forEach(function (elementVal) {
    if (userinputid === elementVal.id){
        alert(elementVal.price);
    }
});

answered Feb 10, 2023 at 11:08

user21186692

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