subnote | Experimental XMind app for Android | SDK library

I'm new in ReactJS. I have a task - to do an app like Notes. User can add sublist to his notes, and note have to save to the state in subarray. I need to save sublist in the array inside object. I need to get state like this: [...notes, { _id: noteId, text: noteText, notes: [{_id: subNoteId, text: subNoteText, notes[]}] }].

How can I to do this?

Sandbox here: https://codesandbox.io/s/relaxed-lamarr-u5hug?file=/src/App.js

Thank you for any help, and sorry for my English

I would like to get the root node of the tree in the model below:

I have a large, complex XML-file and need to extract values and attributes of certain sub(sub...)nodes. But because not all subnotes have all wanted values (some are missing) I cannot eaysily use the very fast xml_find_all (Packet XML2), because it will of course not include the subnotes with missing values.

My solution is to use a for-loop cycling through all of my xml-nodes (Objects) and check within each node, if my desired value is existent - if yes extract it. Thanks to the index of the loop I know to which Object it belongs and write it to the corresponding data.frame$Feature[i].

This approach works fine, but for my large XML-Node it takes VERY long (20 min) and is very memory consuming (~1.5GB, because of if-loop). My XML: 100MB, about 30.000 "entries/Objects" each with about 50 features (~ 2 Mio lines)

The main problem which I figured out: xpathSApply(...xml_path(Obj[i]...) is very slow, if the indexing [i] of my loop is quite high (>5000)

My questions are:

• Do you have any better/simpler idea to solve my problem with a very complex and higly inhomogenic, structured XML, where not all features are present in all object(nodes)?
• I read this interesting approach, but could not figure out how to translate it to my very complex XML, where my desired values are in different Nodeset-levels...
• Is there maybe some nested xpathSApply-expression to circumvent a for-loop and avoid using index?
• Do you now any "vector"-processing approaches (which are quite faster in R) for my problem?

See my MWE-Code with some more comments below.

XML

i need some help at looping over an Object with Array of Objects

Here is an example Object:

I have JSON-data that represents a tree-structure (data:string in app.component.ts).

Now I like to present the data in a table. For that I built foo.component.ts. It prints one node and recusively goes ahead.

That is all working fine.

Here is it: https://stackblitz.com/edit/angular-bqfh7h

But next I like to click on a node and mark every subnode of that node. Marking should be changing the font-weight in my sample.

That is not working and I am not sure why. I put the marking-action in the because I think that includes every subnote.

Not sure if I did it wrong or that is not possible with recursive component.

Any idea to make it work?

I have a RadGridView (Telerik) and it has a handful of columns. In the row details template I have another grid view displaying sub-items that have the same columns. This works great for the initial display, but I would like the column widths for the details template to follow the widths of the main grid (details template does not have headers).

I tried giving the main column a name and binding to 'Width' and 'ActualWidth' properties of that column by name but it didn't seem to take and didn't give any binding errors.

Is there any way to bind the width of a column on one RadGridView to the width of a column on another RadGridView?

EDIT

Per the suggestion below I tried binding the view to the tag and going that way and it doesn't seem to work. It works for the textblock but doesn't set the column width. Here is a video of what I see:

https://www.screencast.com/t/BiHmiarQExV

Here is the code I'm using:

the below codes are working fine(individually) i just want to pass letter[i] value from FindDrive class to Ziputils input file location such that i can zip pendrive data automatically.

FindDrive Class