Node JS "let" command questions / quirks

Working with Data Node.js Frameworks
1

Hello,

Will someone please point me to the Mongo documentation for the “let” command?

Seems to be used to execute a dB call to set a cursor like “let result = await companiesCollection.updateOne(documentToUpdate, updateEmployees)”

Seems to be used to set a variable value: let documentToUpdate = {“name”:“Zvents”}
However, the “const” command is also used to set a variable value:
const update = { $inc: { balance: 100 }}
Why have two ways to do the same thing?

Thanks,

John

2

Not 2, but 3.

Using let, vs const vs var has absolutely nothing to do with MongoDB.

They are pure JavaScript concepts.

You may start with

  1. let - JavaScript | MDN,
  2. const - JavaScript | MDN
  3. and var - JavaScript | MDN
3

Thanks Steeve. Oh, so let, const and var are JavaScript concepts. Thanks for the links!

4

I don’t see a way to close out this post. How do I close it?

5

Since you started the thread the three little dots should provide you with a solution button.

6

i got that option to close in a current posting, but not on these older ones.

7

Thanks for trying.

Hopefully someone with admin rights will take care of it.