Basic JavaScript: Record Collection https://learn.freecodecamp.org/javascript-algorithms-and-data-structures/basic-javascript/record-collection/ // Setup var collection = { "2548" : { "album" : "Slippery When Wet" , "artist" : "Bon Jovi" , "tracks" : [ "Let It Rock" , "You Give Love a Bad Name" ] }, "2468" : { "album" : "1999" , "artist" : "Prince" , "tracks" : [ "1999" , "Little Red Corvette" ] }, "1245" : { "artist" : "Robert Palmer" , "tracks" : [ ] }, "5439" : { "album" : "ABBA Gold" } }; // Keep a copy of the collection for tests var collectionCopy = JSON.parse(JS...
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