javascript 对象引用错误

Question

我遇到这样的错误：

    let     needUploadFiles: string[] = [],
            needUploadPages: Filmstrip[] =[],
            needUploadContents: string[] = [];


        Win.dataSource.filmstrips.forEach((filmstrip: Filmstrip, index) => {

            if (Page.pages[index]) {
                filmstrip.content = Page.pages[index].cleanHTML();
            }   

            let hash = Lib.sha1(filmstrip.content),
                content: string = filmstrip.content;

            if (filmstrip.hash != hash) {
                needUploadFiles.push(hash);
                needUploadPages.push(filmstrip);
                needUploadContents.push(content);

            }

        });

Promise.uploadFiles(
                needUploadFiles, needUploadContents,
                (hash: string, index: number) => {
                    needUploadPages[index].hash = hash;
                }
            );

我想要零钱Win.dataSource.filmstrips.hash;

通常没问题。

但有时需要UploadPages[index].hash不能改Win.dataSource

我在 Promise.uploadFiles 中添加控制台，例如：

我改变了 Win.dataSource.filmstrips，

制作 Win.dataSource.filmstrips.length = 1 检查；

出现错误时：

Promise.uploadFiles(
                    needUploadFiles, needUploadContents,
                    (hash: string, index: number) => {
                        console.log(hash);
                        needUploadPages[index].hash = hash;
                        console.log(needUploadPages[index].hash == hash)//true
                        console.log(Win.dataSource.filmstrips[index].hash == hash)//false
                        console.log(Win.dataSource.filmstrips[index] === needUploadPages[index])// false
                    }
                );

然后我改成这样：

            let needUploadPages: Filmstrip[] =[],
            needUploadContents: string[] = [],
            needUploadIndex: number[] = [];

        Win.dataSource.filmstrips.forEach((filmstrip: Filmstrip, index) => {

            if (Page.pages[index]) {
                filmstrip.content = Page.pages[index].cleanHTML();
            }   

            let hash = Lib.sha1(filmstrip.content),
                content: string = filmstrip.content;

            if (filmstrip.hash != hash) {

                needUploadPages.push(filmstrip);
                needUploadContents.push(content);
                needUploadIndex.push(index);
            }

        });

Promise.uploadFiles(
                needUploadFiles, needUploadContents,
                (hash: string, index: number) => {

               Win.dataSource.filmstrips[needUploadIndex[index]].hash = hash;

                }
            );

这不是错误。

我不知道为什么。

为什么有时对有时错;

我希望得到这个答案。

谢谢你们，

我英文不好，抱歉

Answer 1

对象引用工作正常。试试这个简单的例子：

const origObjects = [{a: 1}, {a: 2}, {a: 3}]
const newObjects = []

origObjects.forEach(obj => newObjects.push(obj))
newObjects[1].a = 55
console.log(origObjects[1]) // Results in {a: 55}

我会说你在数组和索引的某处有错误。尝试console.log数组并比较它们是否具有相同的内容。

javascript 对象引用错误

a javascript Object reference bug

javascript

object-reference