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</head><body><script>// 数组reduce方法// arr.reduce(function(){上一次值，当前值},初始值)const arr = [1, 5, 8]// 1.没有初始值// const total = arr.reduce(function (prev, current) {// return prev + current// })// console.log(total)//14// 2.有初始值// const total = arr.reduce(function (prev, current) {// return prev + current// }, 10)// console.log(total)//24// 3.箭头函数写法const total = arr.reduce((prve, current) => prve + current, 10)console.log(total)//24</script>
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练习：
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</head><body><script>const arr = [{name: '张三',salary: 10000}, {name: '李四',salary: 20000}, {name: '王五',salary: 30000}]// 计算三人薪资的总和const total = arr.reduce((prev, current) => {return prev + current.salary}, 0)console.log(total)//600000// 需求：每人每月涨薪30% ，计算当前总和const total1 = arr.reduce((prev, current) => {return prev + current.salary * 1.3}, 0)console.log(total1)//78000</script>
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