EN
JavaScript - set a value of nested key string descriptor inside an object
2 points
In this article, we would like to show how to sets a value of nested key string descriptor inside an object using modern ECMA Script (modern JavaScript).
Example solution:
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const setNestedProperty = (object, path, value) => {2
if (path.length == 0) {3
return;4
}5
const limit = path.length - 1; 6
for (let i = 0; i < limit; ++i) {7
const name = path[i];8
object = object[name] || (object[name] = { });9
}10
const name = path[limit];11
object[name] = value;12
}13
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// Usage example:15
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const object = {17
name: 'John',18
metadata: {19
type: 'json'20
}21
};22
const myKeyPath = ['metadata', 'key'];23
const myKeyValue = 'my-key-value';24
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setNestedProperty(object, myKeyPath, myKeyValue);26
console.log(`object.metadata.key='${object.metadata.key}'`);