I am trying to sort a discord bot to display the top 3 members. However I keep getting the error:

JavaScript error: Uncaught TypeError: guildStats.slice

This is what I tried:

var guildStats = {
  '1234567': {
    xp: 95,
    level: 0,
    last_message: 1631181685724,
    invited: {},
    invited_by: 0
  },
  '0987654': {
    xp: 13,
    level: 0,
    last_message: 1631181527799,
    invited: {},
    invited_by: 0
  },
  '243562345': {
    xp: 18,
    level: 0,
    last_message: 1631181537020,
    invited: {},
    invited_by: 0
  },
  '76533465': {
    xp: 14,
    level: 0,
    last_message: 1631181536875,
    invited: {},
    invited_by: 0
  },
  '34667634567': {
    xp: 8,
    level: 0,
    last_message: 1631181659142,
    invited: {},
    invited_by: 0
  },
  '346534': {
    xp: 98,
    level: 0,
    last_message: 1631181638743,
    invited: {},
    invited_by: 0
  },
  '34343677677886': {
    xp: -63,
    level: 0,
    last_message: 1631181584314,
    invited: {},
    invited_by: 0
  },
  '987654345676543': {
    xp: 20,
    level: 0,
    last_message: 1631181589153,
    invited: {},
    invited_by: 0
  },
  '75634576786588': {
    xp: -140,
    level: 0,
    last_message: 1631181593304,
    invited: {},
    invited_by: 0
  },
  '34343434556566': {
    xp: 43,
    level: 0,
    last_message: 1631181663340,
    invited: {},
    invited_by: 0
  }
};


var byXP = guildStats.slice(0);
byXP.sort(function(a,b) {
    return a.xp - b.xp;
});

document.write(byXP);

What I want to output is

The top 3 members by XP are: 
1. 346534
2. 1234567
3. 34343434556566

I know i've messed up somewhere.

How do I sort all the objects in guildStats by the child objects key xp's value

Thanks for the help.

CodePudding user response：

You can use Object.fromEntries() to turn your object into an array of [key,value] pairs.

We can then sort on xp and return the top three entries using Array.slice().

var guildStats = { '1234567': { xp: 95, level: 0, last_message: 1631181685724, invited: {}, invited_by: 0 }, '0987654': { xp: 13, level: 0, last_message: 1631181527799, invited: {}, invited_by: 0 }, '243562345': { xp: 18, level: 0, last_message: 1631181537020, invited: {}, invited_by: 0 }, '76533465': { xp: 14, level: 0, last_message: 1631181536875, invited: {}, invited_by: 0 }, '34667634567': { xp: 8, level: 0, last_message: 1631181659142, invited: {}, invited_by: 0 }, '346534': { xp: 98, level: 0, last_message: 1631181638743, invited: {}, invited_by: 0 }, '34343677677886': { xp: -63, level: 0, last_message: 1631181584314, invited: {}, invited_by: 0 }, '987654345676543': { xp: 20, level: 0, last_message: 1631181589153, invited: {}, invited_by: 0 }, '75634576786588': { xp: -140, level: 0, last_message: 1631181593304, invited: {}, invited_by: 0 }, '34343434556566': { xp: 43, level: 0, last_message: 1631181663340, invited: {}, invited_by: 0 } }; 

var byXP = Object.entries(guildStats);
byXP.sort(function([keya,valuea],[keyb,valueb]) {
    return valueb.xp - valuea.xp;
});

console.log('The top 3 members by XP are:');
byXP.slice(0,3).forEach(([key, member],idx) => console.log(`${idx 1}. ${key}, xp: ${member.xp}`));