手写 for 循环

let arr = [{
    name: 'jin',
    code: 1
}, {
    name: 'chang',
    code: 2
} ...]
let obj = {
    name: 'jin',
    code: 1
}
for(let i = 0, iLen = arr.length; i < iLen; i++) {
    if (arr[i].code === obj.code) {
        return i
    }
}

使用findIndex

let arr = [{
    name: 'jin',
    code: 1
}, {
    name: 'chang',
    code: 2
} ...]
let obj = {
    name: 'jin',
    code: 1
}
arr.findIndex((el) => {
  return el.code === obj.code
})

ts中的使用

let index =  _circlesItem?.taskLikes.findIndex((el:any) => el.likeDescId == res.data.taskLike.likeDescId && el.userId == res.data.taskLike.userId)

数组根据下标删除

_circlesItem?.taskLikes.splice(index, 1);