JS

时间戳

let time = new Date().getTime()

 forEach

arr.forEach(item =>{
  item ...
  return 跳过本次循环
})

获取Object的key、value

let config = {xxxxx}
let arr = Object.keys(config)
let arrValue = Object.value(config)
arr.forEach(configItem => {
    attr.permission[this.headers[cell[1]].key] = config
})

传入函数，实现加减乘除

// expression:( 8 + 8 ) / 2  ->  return:4
function calc(expression) {
    return Function('return (' + expression + ')')()
}

数组过滤 true保留 false过滤

this.headers = this.allHeaders.filter(header => {
    return !header.viewCol && header.choose
})