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mvfront-react/services/majorityJudgment.ts

30 lines
756 B

/**
* A few useful function for dealing with majority judgment
*/
import { MeritProfileInterface } from './type';
/**
* Return the index corresponding to the majority grade
*/
export const getMajorityGrade = (profile: MeritProfileInterface): number => {
const indices = Object.keys(profile);
const numVotes = Object.values(profile).reduce((a, b) => a + b, 0);
let majorityGrade = indices[0];
let accBefore = 0;
let isBefore = true;
for (const value of indices) {
if (isBefore) {
accBefore += profile[value];
}
if (isBefore && accBefore > numVotes / 2) {
majorityGrade = value;
accBefore -= profile[value];
isBefore = false;
}
}
const value = indices.indexOf(majorityGrade);
return value;
};