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| /**
| * 权重
| */
| module.exports = function (tasks, weightTotal, context) {
|
| if (!tasks.length) return null;
|
| let max = tasks[0].weight, maxIndex = 0, sum;
|
| for (let i = 0; i < tasks.length; i++) {
| sum = (tasks[i].weight || 0) + Math.random() * weightTotal;
| if (sum >= max) {
| max = sum;
| maxIndex = i;
| }
| }
|
| context.weightIndex += 1;
| context.weightIndex %= (weightTotal + 1);
|
| return tasks[maxIndex];
| };
|
|
