Creating a 10-digit unique value can be achieved with either meteor or JavaScript

Question

Creating a 10-digit unique value can be achieved with either meteor or JavaScript

I am in need of generating 10 character unique codes, containing both letters and digits, to be utilized for system generated gift vouchers. Currently, the code I am using includes 13 numbers.

var today = new Date();
Number(today);

Is there a different method available to generate 10 digit unique codes for the system generated gift vouchers? The generated codes should never be the same at any given time. I am looking for a way to generate codes similar to the _id field in the meteor collection. What would be the most effective way to accomplish this?

In meteor, unique ids are generated for records. I am seeking a solution to create a 10 digit unique value in the same manner.

javascript meteor

Answer 1

Answer №1

Behold a concise, efficient, and safe solution crafted for managing time values, presenting a truly remarkable approach:

var unique = new Date().valueOf();
console.log('WITH 13 digits '+ unique);
console.log('WITH 10 digits ' +String(unique).substring(3, 13));

Answer 2

Behold a concise, efficient, and safe solution crafted for managing time values, presenting a truly remarkable approach:

var unique = new Date().valueOf();
console.log('WITH 13 digits '+ unique);
console.log('WITH 10 digits ' +String(unique).substring(3, 13));

Answer 3

Answer №2

Unique first method: (not recommended for use due to potential drawbacks)

var cache = {};

function generateRandomValue() {
  var value = Math.floor(Math.random() * 10000000000); // generating a random number between 0 and 10000000000
  
  value = ('000000000' + rand).slice(-10); // ensuring it has 10 digits
  
  return cache[value] == undefined? cache[value] = value: generateRandomValue(); 
}

console.log(generateRandomValue());
console.log(generateRandomValue());
console.log(generateRandomValue());
console.log(generateRandomValue());
// ...

Note: Be cautious as this method could lead to a slow execution over time and may result in a stack overflow error.

Unique second method: (the safer option)

var START_ID = 1; // The initial ID

function generateSequentialValue() {
  var value = START_ID++;
  value = ('000000000' + value).slice(-10);
  return value;
}

console.log(generateSequentialValue());
console.log(generateSequentialValue());
console.log(generateSequentialValue());
console.log(generateSequentialValue());
// ...

Note: To remove leading 0s, modify this line:

value = ('000000000' + value).slice(-10);

to:

value = '1' + ('00000000' + value).slice(-9);

Answer 4

Unique first method: (not recommended for use due to potential drawbacks)

var cache = {};

function generateRandomValue() {
  var value = Math.floor(Math.random() * 10000000000); // generating a random number between 0 and 10000000000
  
  value = ('000000000' + rand).slice(-10); // ensuring it has 10 digits
  
  return cache[value] == undefined? cache[value] = value: generateRandomValue(); 
}

console.log(generateRandomValue());
console.log(generateRandomValue());
console.log(generateRandomValue());
console.log(generateRandomValue());
// ...

Note: Be cautious as this method could lead to a slow execution over time and may result in a stack overflow error.

Unique second method: (the safer option)

var START_ID = 1; // The initial ID

function generateSequentialValue() {
  var value = START_ID++;
  value = ('000000000' + value).slice(-10);
  return value;
}

console.log(generateSequentialValue());
console.log(generateSequentialValue());
console.log(generateSequentialValue());
console.log(generateSequentialValue());
// ...

Note: To remove leading 0s, modify this line:

value = ('000000000' + value).slice(-10);

to:

value = '1' + ('00000000' + value).slice(-9);

Answer 5

Answer №3

If you need to generate a unique string using JavaScript, you can write a custom function like this:

function generateUniqueString()
{
    var text = "";
    var characters = "ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789";

    for( var i=0; i < 8; i++ )
        text += characters.charAt(Math.floor(Math.random() * characters.length));

    return text;
}

Answer 6

If you need to generate a unique string using JavaScript, you can write a custom function like this:

function generateUniqueString()
{
    var text = "";
    var characters = "ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789";

    for( var i=0; i < 8; i++ )
        text += characters.charAt(Math.floor(Math.random() * characters.length));

    return text;
}

Creating a 10-digit unique value can be achieved with either meteor or JavaScript

Answer №1

Answer №2

Unique first method: (not recommended for use due to potential drawbacks)

Unique second method: (the safer option)

Answer №3

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