删除数组中的元素，怎么将删除元素的id组成一个数组

Question

removeCost: function (item) {

  let index = this.form.addReceiptsCostVOList.indexOf(item)
    let ids = []
  for (var i = 0; i < this.form.addReceiptsCostVOList.length; i++) {
    ids.push(item.costId)
    this.form.delCostIds = ids
  }
  if (index !== -1) {
      this.form.addReceiptsCostVOList.splice(index, 1)
    }
      console.log('form', this.form)
}
想着在删除一条数据后，获取删除数据的id,组成一个数组，怎么删除多条数据，获取多个id ,怎么设置循环条件

Answer 1

removeCost: function (item) {
  let index = this.form.addReceiptsCostVOList.indexOf(item)
  let ids = []
  for (var i = 0; i < this.form.addReceiptsCostVOList.length; i++) {
    ids.push(item.costId)
  }
  this.form.delCostIds = ids
  for (let i = 0; i < ids.length; i++) {
    this.form.addReceiptsCostVOList.splice(ids.length - 1 - i, 1)
  }
  console.log('form', this.form)
}

Answer 2

可以考虑 filter 过滤掉包含 item数组里的id的元素

Answer 3

可以考虑使用闭包函数改造一下， 需要注意下this指向

removeCost: (() => {
  let ids = []
  this.form.delCostIds = ids
  return (item) => {
     let index = this.form.addReceiptsCostVOList.indexOf(item)
     if (index !== -1) {
         ids.push(item.costId)
         this.form.addReceiptsCostVOList.splice(index, 1)
     }
  }
})()