Sort arrays in Javascript by their respective lengths

Question

Sort arrays in Javascript by their respective lengths

Is there a way to arrange these arrays in descending order of the number of items they contain? I believe the logic is correct, but I might be missing some essential methods. The current output is empty.

//Declare Variables
var TN = ['Chattanooga', 'Nashville', 'Memphis'],
    FL = ['Tampa', 'Miami', 'Orlando', 'Clearwater'],
    GA = ['Atlanta', 'Marietta'];



//Create a function to sort arrays from most to least items
function sortStates(a, b){
    return a - b;
}


//Create an object to store the total items in each array 
var stateTotal = {
        totalTN: TN.length,
        totalFL: FL.length,
        totalGA: GA.length
};

//Sort states in descending order based on the number of items
stateTotal.sort(sortStates);

console.log(stateTotal);

Expected Output:

totalFL: 4, totalTN: 3, totalGA: 2

javascript arrays

Answer 1

Answer №1

Objects do not have the ability to be "sorted", unlike arrays which can be sorted.

Are you working on a specific task or assignment? The instruction to

Create an object to get total in each array

seems unclear.

Nevertheless, here is a code snippet to demonstrate the sorting of states based on their total count:

//Define Arrays
var TN = ['Chattanooga', 'Nashville', 'Memphis'],
    FL = ['Tampa', 'Miami', 'Orlando', 'Clearwater'],
    GA = ['Atlanta', 'Marietta'];

//Function to sort arrays in descending order
function sortStates(a, b) {
    return b.total - a.total;
}

//Create an object to store the total count of elements in each array
var stateTotal = [
    { name: 'totalTN', total: TN.length },
    { name: 'totalFL', total: FL.length },
    { name: 'totalGA', total: GA.length }
];

//Sort the states based on total count
stateTotal.sort(sortStates);

stateTotal.forEach(info => {
  console.log(`${info.name}: ${info.total}`);
});

Answer 2

Objects do not have the ability to be "sorted", unlike arrays which can be sorted.

Are you working on a specific task or assignment? The instruction to

Create an object to get total in each array

seems unclear.

Nevertheless, here is a code snippet to demonstrate the sorting of states based on their total count:

//Define Arrays
var TN = ['Chattanooga', 'Nashville', 'Memphis'],
    FL = ['Tampa', 'Miami', 'Orlando', 'Clearwater'],
    GA = ['Atlanta', 'Marietta'];

//Function to sort arrays in descending order
function sortStates(a, b) {
    return b.total - a.total;
}

//Create an object to store the total count of elements in each array
var stateTotal = [
    { name: 'totalTN', total: TN.length },
    { name: 'totalFL', total: FL.length },
    { name: 'totalGA', total: GA.length }
];

//Sort the states based on total count
stateTotal.sort(sortStates);

stateTotal.forEach(info => {
  console.log(`${info.name}: ${info.total}`);
});

Answer 3

Answer №2

The most effective method for sorting states by the length of their towns is

var states=[];
states.push({
    name:"NY",
    towns:['New York City', 'Albany', 'Buffalo']
    });
states.push({
    name:"CA",
    towns:['Los Angeles', 'San Francisco', 'San Diego']
    });
states.push({
    name:"TX",
    towns:['Houston', 'Dallas', 'Austin']
});
states.sort((state1,state2) => state2.towns.length - state1.towns.length).forEach( state => console.log(`Total ${state.name}: ${state.towns.length}`));

Answer 4

The most effective method for sorting states by the length of their towns is

var states=[];
states.push({
    name:"NY",
    towns:['New York City', 'Albany', 'Buffalo']
    });
states.push({
    name:"CA",
    towns:['Los Angeles', 'San Francisco', 'San Diego']
    });
states.push({
    name:"TX",
    towns:['Houston', 'Dallas', 'Austin']
});
states.sort((state1,state2) => state2.towns.length - state1.towns.length).forEach( state => console.log(`Total ${state.name}: ${state.towns.length}`));

Answer 5

Answer №3

When working with objects and arrays, it can be easy to get confused. Arrays, denoted by [], can be sorted, but object properties are not sorted.

//Defining Variables
var myData = {TN:['Chattanooga', 'Nashville', 'Memphis'],
              FL:['Tampa', 'Miami', 'Orlando', 'Clearwater'],
              GA:['Atlanta', 'Marietta']};

var keys=Object.keys(myData);

var mySort=[];
for(key in keys){
   mySort.push([keys[key],myData[keys[key]].length]);
}

mySort.sort(function(a, b){
    return b[1] - a[1];
});

myObj={};

for(let i=0;i<mySort.length;i++){

myObj["total" + mySort[i][0]] = mySort[i][1]

}

console.log(myObj);

Answer 6

When working with objects and arrays, it can be easy to get confused. Arrays, denoted by [], can be sorted, but object properties are not sorted.

//Defining Variables
var myData = {TN:['Chattanooga', 'Nashville', 'Memphis'],
              FL:['Tampa', 'Miami', 'Orlando', 'Clearwater'],
              GA:['Atlanta', 'Marietta']};

var keys=Object.keys(myData);

var mySort=[];
for(key in keys){
   mySort.push([keys[key],myData[keys[key]].length]);
}

mySort.sort(function(a, b){
    return b[1] - a[1];
});

myObj={};

for(let i=0;i<mySort.length;i++){

myObj["total" + mySort[i][0]] = mySort[i][1]

}

console.log(myObj);

Sort arrays in Javascript by their respective lengths

Answer №1

Answer №2

Answer №3

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