di-shan-utils/dist/mean.js

JavaScript 函数库、工具类

var helperNumberDivide = require('./helperNumberDivide')

var getSize = require('./getSize')

var sum = require('./sum')

/**
  * 求平均值函数
  *
  * @param {Array} array 数组
  * @param {Function/String} iterate 方法或属性
  * @param {Object} context 上下文
  * @return {Number}
  */
function mean (array, iterate, context) {
  return helperNumberDivide(sum(array, iterate, context), getSize(array))
}

module.exports = mean