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Odame/ranking.js

Created August 5, 2018 23:09
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  1. Odame created this gist Aug 5, 2018.
    22 changes: 22 additions & 0 deletions ranking.js
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    Original file line number Diff line number Diff line change
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    /**
    * Sort an array of objects based on ranking
    * @param {{name: String, ranking: Number}[]} objectArray
    */
    const sortByRanking = (objectArray) => {
    return objectArray.sort((obj1, obj2) => obj1.ranking-obj2.ranking);
    };


    /**
    * Find the average ranking of an array of objects.
    * Throws an exception if objectArray is empty
    * @param {{name: String, ranking: Number}[]} objectArray
    */
    const computeAverageRanking = (objectArray) => {
    if (objectArray.length) {
    const sumOfRanking = objectArray.reduce((prev, obj) => prev + obj.ranking, 0);
    const numOfObjects = objectArray.length;
    return sumOfRanking/numOfObjects;
    }
    throw new Error('objectArray param, must be non-empty');
    };