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)

     }

  }

})()