js 字符转换，小驼峰转大写字母开头并且加空格 changeDate -》 Change Date

let arr = [
  'changedBy',
  'changedDate',
  'createdBy',
  'createdDate',
  'deleteFlag'
]

arr = arr.map(value => {
  let str = value.replace(/([A-Z])/g," $1")
  let name = str.substr(0,1).toUpperCase() + str.substr(1)
  return {
    name: name, 
    width: 160, 
    isShow: true,
    value: value
  }
})
console.log(JSON.stringify(arr))