The problem is this: you need to convert an array of objects with possibly the same filename values. For example

input: {filename:'test.txt',content:'lorem ipsum dolor sit amet...'} {filename:'test.txt',content:' - fish text for devcelopers'} {filename:'test2.txt',content:'lorem ipsum dolor sit amet... FOREVER!!!!!'} {filename:'test3.txt',content:'User admin pasted lorem ipsum to his project'} Предпологаемый output: {filename:'test.txt',content:'lorem ipsum dolor sit amet... - fish text for devcelopers'} {filename:'test2.txt',content:'lorem ipsum dolor sit amet... FOREVER!!!!!'} {filename:'test3.txt',content:'User admin pasted lorem ipsum to his project'}

Here is the TypeScript code:

 function concat(filesdata:Array<FileData>):Promise<any>{ console.log("CONCATINATION OF FILES:",filesdata); return new Promise((resolve,reject) => { let files:Array<File> = []; filesdata.forEach(file => { files.push(file.toParent()); }); console.log("CONCATED FILES:",files); resolve(files); }); }

And the types themselves

 class File{ public filename:string; public content:string; constructor(filename:string,content:string){ this.filename = filename; this.content = content; } } class FileData extends File { private _hash:string; private err:Function; constructor( filename:string,content:string,hash:string,errorHander:Function ) { super(filename,content); this.err = errorHander; if(this.hash != hash)this.err("Hashes not match!!!"); this._hash = hash; } toParent():File{ return new File(super.filename,super.content); } checkHash(hash:string):boolean{ return this.hash === hash; } get content():string{ return super.content; } set content(value){ super.content = value; } get filename():string{ return super.filename; } set filename(value){ super.filename = value; } get hash():string{ return hash(super.content); } set hash(value){ throw new Error("Field hash is read-only"); } }

Help

    1 answer 1

     function concat(filesdata: FileData[]): File[] { console.log("CONCATINATION OF FILES:", filesdata); const files: File[] = []; for (const fileData of filesdata) { if (!files.some((file) => { if (file.filename === fileData.filename) { file.content += fileData.content; return true; } return false; })) { files.push(fileData); } } console.log("CONCATED FILES:", files); return files; }

    I think that the promise is not needed.