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Add sorting helpers

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This commit is contained in:
Maciej Ziarkowski 2020-01-27 01:01:18 +00:00
parent 52ad759c4d
commit 196c7b7873
1 changed files with 12 additions and 0 deletions
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app/src/helpers.ts
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@ -34,3 +34,15 @@ export function isNullishOrEmpty(obj: any) {
export function isEmptyArray(obj: any) { export function isEmptyArray(obj: any) {
return Array.isArray(obj) && obj.length === 0; return Array.isArray(obj) && obj.length === 0;
} }
type AccessorFunction<T, V> = (obj: T) => V;
type CompareFunction<T> = (a: T, b: T) => number;
export function numAsc<T, V extends number | bigint>(accessor: AccessorFunction<T, V>): CompareFunction<T>{
return (a: T, b: T) => Number(accessor(a) - accessor(b));
}
export function numDesc<T, V extends number | bigint>(accessor: AccessorFunction<T, V>): CompareFunction<T> {
return (a: T, b: T) => Number(accessor(b) - accessor(a));
}