Input:
[
{
temp: "24",
date: "2019-10-16T11:00:00.000Z"
}
]
Output:
[[new date("2019-10-16T11:00:00.000Z").getTime(), 24]]
Got some annoying mutability problems if I do it in vanilla javascript.
Good case to use ramda.
Something like:
const convertFunc = ...
const convertArr = R.map(convertFunc)
const result = convertArr(arr);
I'm stuck. Any ideas what Ramda functions to use?
I'm not sure Ramda would add anything substantial. Especially if you can use parameter destructuring:
map(({temp, date}) => [new Date(date).getTime(), temp],
[{ temp: "24",
date: "2019-10-16T11:00:00.000Z"}]);
//=> [[1571223600000, "24"]]
const convertArr = R.map(({temp, date}) => [new Date(date).getTime(), temp])You can map the array of objects, and use R.evolve to convert the date string to time via Date.parse(), and then get the R.props to convert to an array of arrays.
const { map, pipe, evolve, identity, props } = R
const fn = map(pipe(
evolve({ temp: identity, date: Date.parse }),
props(['date', 'temp'])
))
const data = [{temp: "24",date: "2019-10-16T11:00:00.000Z"}]
const result = fn(data)
console.log(result)<script src="https://cdnjs.cloudflare.com/ajax/libs/ramda/0.26.1/ramda.js"></script>