hughsw

// See: https://gist.github.com/nealrs/4bdcb6316665338d9a1f7c2b690d6a19

const Excel = require('exceljs');

// create workbook & add worksheet                                                                                                                                                                   
const workbook = new Excel.Workbook();
const worksheet = workbook.addWorksheet('Discography');

// add column headers                                                                                                                                                                                
worksheet.columns = [

hughsw

const input = ['AED_AFN', 'ALL_AMD', 'AMD_AFN', 'ALL_GBP'];                                                                                                                                                
console.log('input:', JSON.stringify(input));                                                                                                                                                              
                                                                                                                                                                                                           
// somewhat functional, somewhat imperative                                                                                                                                                                
const collectSymbols0 = pairs => {                                                                                                                                                                         
  co

hughsw

Real-world, little Javascript problem

Input is an array of strings.
Each string encodes a pair of 3-letter symbols, separated by an underscore '_'.
We talk about the left-hand and right-hand symbols that are encoded into the string.
E.g. 
  ['AED_AFN', 'ALL_AMD', 'AMD_AFN', 'ALL_GBP']
'AED' is the left-hand symbol of the first pair; 'AFN' is the right-hand symbol of the first pair.  Etc.

We want this data rearranged into an object.