The below code achieves desired output. Is there a more elegant way to do this?
For example, is there some native javascript function like flatMap etc that would help?
(I know I could get rid of the intermediate variable pieces).
const config = {
fieldName1: {
validation: "schema1",
value: "abcvalue here"
},
fieldName2: {
validation: "schema2",
value: "abcvalue here"
},
}
// Desired output:
// {
// fieldName1: "schema1",
// fieldName2: "schema2",
// ...
// }
const extractValidation = (config) => {
const pieces = Object.entries(config).map(
([key, val]) => ({
[key]: val.validation
})
)
return Object.assign({}, ...pieces)
}
extractValidation(config)
It's more concise, and I think prettier, to pair fromEntries with a map over .entries.
const config = {
fieldName1: {
validation: "schema1",
value: "abcvalue here"
},
fieldName2: {
validation: "schema2",
value: "abcvalue here"
},
}
const extractValidation = (config) => Object.fromEntries(
Object.entries(config).map(([k,v]) => [k, v.validation])
);
console.log(extractValidation(config))An alternative is to use reduce so you can skip the Object.assign:
Object.entries(config).reduce((o, [k, v]) => (o[k] = v.validation, o), {})
//=> {fieldName1: 'schema1', fieldName2: 'schema2'}
this is how I would do it.
By leveraging Ramda, you can go point-free and use map to any Functor
const fn = R.map(R.prop('validation'));
const data = {
fieldName1: {
validation: "schema1",
value: "abcvalue here"
},
fieldName2: {
validation: "schema2",
value: "abcvalue here"
},
};
console.log(
fn(data),
);<script src="https://cdnjs.cloudflare.com/ajax/libs/ramda/0.28.0/ramda.js" integrity="sha512-ZZcBsXW4OcbCTfDlXbzGCamH1cANkg6EfZAN2ukOl7s5q8skbB+WndmAqFT8fuMzeuHkceqd5UbIDn7fcqJFgg==" crossorigin="anonymous" referrerpolicy="no-referrer"></script>