I would like to know how to change the value in a nested object array using javascript.
how to change the "load": "undefined"
to "load":1
in the obj
var obj=[{
"id": "service",
"country": "AR",
"load": "undefined"
},{
"id": "fund",
"country": "CA",
"load": "undefined"
}]
var result = obj.forEach(e=>e.load=1);
Expected Output:
[{
"id": "service",
"country": "AR",
"load": 1
},{
"id": "fund",
"country": "CA",
"load": 1
}]
I would like to know how to change the value in a nested object array using javascript.
how to change the "load": "undefined"
to "load":1
in the obj
var obj=[{
"id": "service",
"country": "AR",
"load": "undefined"
},{
"id": "fund",
"country": "CA",
"load": "undefined"
}]
var result = obj.forEach(e=>e.load=1);
Expected Output:
[{
"id": "service",
"country": "AR",
"load": 1
},{
"id": "fund",
"country": "CA",
"load": 1
}]
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edited Aug 3, 2019 at 14:38
Senthil
asked Aug 3, 2019 at 14:32
SenthilSenthil
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2
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Why the two key names are different
load
andloading
– Maheer Ali Commented Aug 3, 2019 at 14:34 -
2
Your code works. The only issue is that
forEach
doesn't return anything - you're instead changingobj
in-place, so you can just return that, if needed. – VLAZ Commented Aug 3, 2019 at 14:37
2 Answers
Reset to default 8You can do this easily with new ES2015+ syntax. Using the spread operator:
var result = obj.map(e => ({ ...e, load: 1 }));
This will keep all the other props and only change load
to what you want.
Also, FYI - [].forEach()
does not work this way.
forEach
does not return anything,your code is working fine so in your code the original object that is obj
will be changed and if you log it show load:1
. If you don't want to change original array use map which returns a new array
var obj = [{
"id": "service",
"country": "AR",
"load": "undefined"
}, {
"id": "fund",
"country": "CA",
"loading": "undefined"
}]
var result = obj.map(function(elem) {
return Object.assign({}, elem, {
// only change to 1 if value is undefined
load: elem.load === 'undefined' ? 1 : elem.load
})
});
console.log(result)