How to slice an array to get only the last 2 numbers in that array - JavaScript

Question

i'm a newbie in javascript. Please help me to solve this problem.

How to slice an array to get only the last 2 numbers in that array - JavaScript, like this: [1234, 5432, 765764, 546542, 234, 5454] to [34, 32, 64, 42, 34, 54]

Thank you!

Gil · Accepted Answer · 2021-12-14 07:37:21Z

2

You can use the map() method.

const array = [1234, 5432, 765764, 546542, 234, 5454];
const arrayMap = array.map(x => x % 100);
console.log(arrayMap);

answered Dec 14, 2021 at 7:37

Gil

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Tim Biegeleisen · Accepted Answer · 2021-12-14 07:35:13Z

1

Well you could just use the modulus here to find the last two digits of each input number:

var input = [1234, 5432, 765764, 546542, 234, 5454];
var output = [];
for (var i=0; i < input.length; ++i) {
    output.push(input[i] % 100);
}
console.log(output);

answered Dec 14, 2021 at 7:35

Tim Biegeleisen

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Johan Carlsson · Accepted Answer · 2021-12-14 07:39:47Z

1

Slicing in javascript would be to get a sub array of the original array, what you're looking for is a transformation of the values.

The operation you need is to take the number and apply % 100. This will return the remainder from when dividing with 100, which becomes the last two digits.

In code this will look like:

list = [11234, 5432, 765764, 546542, 234, 5454]
newList = list.map( (num) => { return num % 100 })
console.log(newList)

answered Dec 14, 2021 at 7:39

Johan Carlsson

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