Ramda 数组到多个参数 function

Question

Given the input of string 6-10 , I want to obtain a list of numbers [6,6.5,7,7.5,8,8.5,9,9.5,10] .

This is what I have come up with:

const x = "6-10";
const sizeMinMax = R.pipe(R.split('-'), R.map(parseInt))
sizeMinMax(x); //[6,10]

const sizesStepped = (min, max) => R.unfold(minSize => minSize > max ? false : [minSize, minSize + 0.5], min)
sizesStepped(8,10); // [8,8.5,9,9.5,10]

How do I pipe the output of sizeMinMax(x) which is an array to sizeStepped function with 2 arguments?

Answer 1

You can do it in vanilla JavaScript by implementing a range method.

 const range = (start, stop, step) => Array.from({ length: (stop - start) / step + 1 }, (_, i) => start + i * step); const x = '6-10'; const [s, e] = x.split('-'); const step = 0.5; const ret = range(+s, +e, step); console.log(ret);

Answer 2

Wrap sizesStepped with R.apply:

 const sizeMinMax = R.pipe(R.split('-'), R.map(parseInt)) const sizesStepped = (min, max) => R.unfold(minSize => minSize > max? false: [minSize, minSize + 0.5], min) const fn = R.pipe(sizeMinMax, R.apply(sizesStepped)); const x = "6-10" const result = fn(x) console.log(result); // [8,8.5,9,9.5,10]

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