How to insert data from one cell to another by selecting it dynamically?

Question

JavaScript

Essence: there are 2 sheets, on one - 2 cells with data (A1 and A2), on the other - column B.
Task: if A1 > 0, put the data from A2 into the cell of column B in row A1 (i.e. pre-number cell is unknown, otherwise everything is clear).
Example:
on sheet 1 A1 = 2, A2 = 10, insert on sheet 2 in B2 the value 10
on sheet 1 A1 = 5, A2 = 10, insert on sheet 2 in B5 the value 10

Answer 1

For find, the 1st parameter is responsible for the conditions, the returned fields determine the 2nd parameter, but if it is present, all other fields of the document will be absent, you can of course list them, but this will have to be changed when changing the structure of the document, example:

var locale = i18n.getLocale();
 Article.find({}, {
    ['title.' + locale]: 1,
    ['content.' + locale]: 1
})

The second option is to convert the result from the base as you need, example:

var locale = i18n.getLocale();
Article.find().sort('-   created').populate('user', 'displayName').exec(function (err, articles) {
  if (err) {
    return res.status(400).send({
      message: errorHandler.getErrorMessage(err)
    });
  } else {
     articles.forEach(article => {
       article.title = article.title[locale];
       article.content = article.content[locale];
     });
     res.json(articles);
  }
});

Answer 2

I decided this way - I numbered column A on the second sheet (in real conditions it was already numbered) and inserted the formula = {"Column name" into B1; ArrayFormula(IF('Sheet 1'!A$1=A2:A;'Sheet 1'!A$2;))}

Answer 3

=IF('Sheet1'!A1>0;'Sheet1'!A2;"No")