Question

您将如何遍历所有0, 1, 2属性并检索值

不仅可以通过myArray[0].postId或myArray[1].postId来完成。这是手动执行的操作。

这是一种循环访问[]数字myArray[0].postId，myArray[1].postId等的方法。

例如遍历这些项目

这是例子

export const GetPosts = () => {
    return (dispatch, getState) => {
        return Axios.get('/api/posts/myPosts')
            .then( (res) => {
                 const data = res.data
                 const likes = res.data // gets  the first item within array, and shows likes.          
                const myLikes = likes.map( (post,i) => {
                    return post.Likes
                 },[])               
                 const myLikes2 = myLikes.map( (like,i) => {
                     return like
                 })
                const myLikes3 = myLikes2.flat();
                const myLikes4 = myLikes3.reduce( (acc,post) => {
                    return acc.concat(post)
                 },[])

                console.log(myLikes4) // trying to get all like postIds not just [0]
                 dispatch({type: GET_POSTS, data, myLikes})
             })

    }
}

Answer 1

也许像这样将帖子Ids作为数组保留下来，以保持脚本风格：

git

这会将myEntry.postId添加到myArray中每个条目的myPostIds数组中。

Answer 2

很多好的解决方案，不妨使用@ d-h-e注释示例，谢谢大家的帮助。

export const GetPosts = () => {
    return (dispatch, getState) => {
        return Axios.get('/api/posts/myPosts')
            .then( (res) => {
                 const data = res.data
                 const likes = res.data // gets  the first item within array, and shows likes.          
                const myLikes = likes.map( (post,i) => {
                    return post.Likes
                 },[])               
                 const myLikes2 = myLikes.map( (like,i) => {
                     return like
                 })
                const myLikes3 = myLikes2.flat();
                const myLikes4 = myLikes3.reduce( (acc,post) => {
                    return acc.concat(post)
                 },[])
                myLikes4.forEach(el => console.log(el.postId));

                 dispatch({type: GET_POSTS, data, myLikes})
             })

    }
}

如何不做[0]就遍历数组键

2 个答案: