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Datatype for Storing Large Number of Elements in JavaScript

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by Abdul Rawoof A R dot icon Updated: Feb 25, 2023

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We can use the BigInt data type to store many elements in JavaScript. 


In JavaScript, all numbers are 64 bits of floating point numbers, which means we cannot represent all the Java longs in JavaScript. Because the mantissa size is about 53 bits, our number, 793548328091516928, cannot be exactly represented as a JavaScript number. It can deal with large numbers in JavaScript using the data type BigInt. The advantage is that it can hold large numbers and perform arithmetic operations. A numeric primitive in JavaScript that can represent integers with arbitrary magnitude is a BigInt data type. With BigInts, we can safely store and operate on large integers beyond the safe integer limit ( Number.MAX_SAFE_INTEGER ) for numbers. To know whether a number is BigInt, look for the letter n in our code following a numeric value in the code itself, and the letter n means the value is BigInt(that is, 37n) and not a number(37). If we want to convert BigInt to any other data type, for example, from BigInt to long, we can use the longValue() function. It converts BigInterger to a long data type analogous to a narrowing primitive conversion from long to an integer.

 

Here is an example of how to implement data type for storing a large number of elements in JavaScript: 

Fig : Preview of the output that you will get on running this code from your IDE.

Code

Javascript data type for storing large number of elements

JavaScriptdotLines of Code : 14dotLicense : Strong Copyleft (CC BY-SA 4.0)

Dependent Libraries : 
console.time ('add 1 million items')
console.log (
  Array.from (Array (1e6), (_,x) => x)
    .reduce ((x,y) => x + y, 0))
console.timeEnd ('add 1 million items') 
// 499999500000
// add 1 million items: 225ms
console.time ('add 10 million items')
console.log (
  Array.from (Array (1e7), (_,x) => x)
    .reduce ((x,y) => x + y, 0))
console.timeEnd ('add 10 million items') 
// 49999995000000
// add 10 million items: 2537.070 ms

Instructions

Follow the steps carefully to get the output easily.

  1. Install JavaScript ES6 code snippet and Code Runner from Extension on your IDE(We use Visual Studio Code).
  2. Copy the snippet using the 'copy' and create one new file filename.js(eg.test.js) then paste the code in that JavaScript file.
  3. Save the file and run the file using run button to generate the output.


I hope you found this useful.


I found this code snippet by searching for 'data type for storing large number of elements in javascript' in kandi. You can try any such use case!

Environment Tested

I tested this solution in the following versions. Be mindful of changes when working with other versions.

  1. The solution is created and tested in Visual Studio Code 1.74.1.
  2. JavaScript ES6 Code Snippet version v1.8.0.
  3. Code Runner version v0.11.8.


Using this solution, we are able to implement datatype for storing large number of elements in javascript with simple steps. This process also facilities an easy way to use, hassle-free method to create a hands-on working version of code which would help us to implement datatype for storing large number of elements in javascript.

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