How to filter data using JavaScript
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const data = [ | |
{ location: { title: 'b' }, size: 25, price: 830 }, | |
{ location: { title: 'c' }, size: 28, price: 700 }, | |
{ location: { title: 'other' }, size: 21, price: 500 } | |
]; | |
function main() { | |
const locationFilter = ['b', 'c']; | |
const priceFilter = []; | |
const match = pipe( | |
filter(x => isEmpty(locationFilter) || locationFilter.includes(x.location.title)), | |
filter(x => isEmpty(priceFilter) || priceFilter.includes(x.price)), | |
range('size', 0, 100) | |
); | |
return match(data); | |
} | |
const includes = item => xs => xs.includes(item); | |
const filter = f => xs => xs.filter(f); | |
const range = (key, min, max) => filter(x => x[key] >= min && x[key] <= max); | |
const isEmpty = arr => arr.length === 0 ? true : false; | |
// Utilize the previous pipe function that accepts only two functions | |
const _pipe = (a, b) => (arg) => { | |
return b(a(arg)); | |
} | |
// The rest parameters creates an array of operations | |
const pipe = (...ops) => { | |
// Iterate over the array of operations | |
// By using reduce, merge all operations into a single bundle | |
let bundle = ops.reduce((prevOp, nextOp) => { | |
return _pipe(prevOp,nextOp); | |
}); | |
return bundle; | |
} | |
main(); |
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