Syntax problem or logic problem relating to record collections question

JavaScript
1

Tell us what’s happening:
Below is my code so far for this problem.
When I try and run the code using VSCode it points to prop as undefined, but when i put the id.prop in brackets the code will run
Anyone know why this is?
ID nor prop are arrays
Also would collection.id.prop = ; be correct when assigning a empty array to it if it met the condition?

Your code so far


// 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"
}
};

// Only change code below this line
function updateRecords(id, prop, value) {
 if((prop === "tracks") && (value !== "")){
       collection.id.push(value);
   }
   else if(value !== ""){
       collection.id.prop = [];
   }
  


return collection;
}

// Alter values below to test your code
updateRecords(5439, "artist", "ABBA");

Your browser information:

User Agent is: Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/79.0.3945.130 Safari/537.36.

Challenge: Record Collection

Link to the challenge:
https://www.freecodecamp.org/learn/javascript-algorithms-and-data-structures/basic-javascript/record-collection

2

Do you remember the difference between dot notation and bracket notation? Remember that prop is a variable.

3

Ah so the parameters in the function are also known as variables?

4

You aren’t looking for the literal string “prop”. You are looking for some value that was passed into the function. That value is represented by the variable prop.

1 Like
6

That clears it up thank you both!