JavaScript array to CSV

Question

I\'ve followed this post How to export JavaScript array info to csv (on client side)? to get a nested js array written as a csv file.

The array looks like:

Answer 1

const escapeString = item => (typeof item === 'string') ? `"${item}"` : String(item)

const arrayToCsv = (arr, seperator = ';') => arr.map(escapeString).join(seperator)

const rowKeysToCsv = (row, seperator = ';') => arrayToCsv(Object.keys(row))

const rowToCsv = (row, seperator = ';') => arrayToCsv(Object.values(row))

const rowsToCsv = (arr, seperator = ';') => arr.map(row => rowToCsv(row, seperator)).join('\n')

const collectionToCsvWithHeading = (arr, seperator = ';') => `${rowKeysToCsv(arr[0], seperator)}\n${rowsToCsv(arr, seperator)}`


// Usage: 

collectionToCsvWithHeading([
  { title: 't', number: 2 },
  { title: 't', number: 1 }
])

// Outputs: 
"title";"number"
"t";2
"t";1