FAQ: Learn Node SQLite - Using db.each()

This community-built FAQ covers the “Using db.each()” exercise from the lesson “Learn Node SQLite”.

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This exercise can be found in the following Codecademy content:

Web Development

Learn Node-SQLite

FAQs on the exercise Using db.each()

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In the example, the second call-back function takes the form of

(error, numberOfRows) => {
    console.log(`There were ${numberOfRows} good dogs`);
}

Is the numberOfRows always the second argument for the db.each() method, just like rows and row are always the second arguments in the callback function for db.all() and db.get(), respectively?

2 Likes

Yes, exactly! :slight_smile:

5 Likes

I’m really confused by the first line of code:

const { addClimateRowToObject, calculateAverages, printQueryResults } = require(’./utils’);

What does this do? How does it relate to the “helper function”

this line imports addClimateRowToObject, calculateAverages, printQueryResults functions (which are all helper functions) from utils.js into our app.js. if you open utils.js you can see them defined there and can understand what they do - also at the bottom of the file you will see them being exported (which we then import into app.js)

There is an Error in Task 1:

The following code will result in a error, allthough correct.

const temperaturesByYear = {

};

CodeAcademy wants you to write this solution:

const temperaturesByYear = {};