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Multi Level Sorting with JavaScript
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const multilevelsort = (records, order) => records.sort(chainSortBy(order)) | |
const sort_by = ({ key, direction }) => { | |
return function (a, b) { | |
a = a[key] | |
b = b[key] | |
return a == b ? 0 : [-1, 1][+(direction === 'ascending')] * ((a > b) - (b > a)) | |
} | |
} | |
const chainSortBy = order => { | |
return function (a, b) { | |
for (let k in order) { | |
let res = sort_by(order[k])(a, b) | |
if (res != 0) | |
return res | |
} | |
return 0 | |
} | |
} |
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var records = [ | |
{name:"christian", age:40, job:"developer"}, | |
{name:"andrew", age:48, job:"developer"}, | |
{name:"elisabeth", age:31, job:"floor manager"}, | |
{name:"oscar", age:61, job:"floor manager"}, | |
{name:"gisela", age:51, job:"area manager"}, | |
{name:"buffy", age:27, job:"trainee"}, | |
{name:"carl", age:23, job:"trainee"} | |
]; | |
var order = [ | |
{key: "job", direction: "ascending"}, | |
{key: "age", direction: "descending"} | |
]; | |
var result = [ | |
{name:"gisela",age:51,job:"area manager"}, | |
{name:"andrew",age:48,job:"developer"}, | |
{name:"christian",age:40,job:"developer"}, | |
{name:"oscar",age:61,job:"floor manager"}, | |
{name:"elisabeth",age:31,job:"floor manager"}, | |
{name:"buffy",age:27,job:"trainee"}, | |
{name:"carl",age:23,job:"trainee"} | |
]; | |
multilevelsort(records,order) === result |
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