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weighted allocation example
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| /* | |
| This can be used when we need to move to a front end that only delivers the | |
| users and their allocation percentage | |
| salesReps is the sample array we would get from the DB. | |
| */ | |
| const salesReps = [ | |
| {name: "Renee", id:"30761006", allocation: 70}, | |
| {name: "Emma", id:"33620479", allocation: 10}, | |
| {name: "Marian", id:"33495420", allocation: 10}, | |
| {name: "Jade", id:"30455396", allocation: 10}, | |
| ] | |
| let weightTotal = salesReps.reduce((tally, rep) => { | |
| return tally += rep.allocation | |
| }, 0) | |
| const allocateRep = () => { | |
| let luckyNumber = Math.floor(Math.random() * weightTotal) | |
| return salesReps.find(rep => { | |
| luckyNumber -= rep.allocation | |
| if (luckyNumber <= 0) { | |
| return rep.name | |
| } | |
| }) | |
| } | |
| // Proof | |
| const test = () => { | |
| index = 0 | |
| itterations = 10000000 | |
| results = [] | |
| while (index++ < itterations) { | |
| results.push(allocateRep().name) | |
| } | |
| const count = results.reduce((tally, result) => { | |
| tally[result] = (tally[result] || 0) + 1 | |
| return tally | |
| }, {}) | |
| console.log(count) | |
| } | |
| test() |
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