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Splitting last n digits of each value in the array in JavaScript
We have an array of literals like this −
const arr = [56768, 5465, 5467, 3, 878, 878, 34435, 78799];
We are required to write a JavaScript function that takes in this array and a number n and if the corresponding element contains more than or equal to n characters, then the new element should contain only the last n characters otherwise the element should be left as it is.
Therefore, if n = 2, for this array, the output should be −
const output = [68, 65, 67, 3, 78, 78, 35, 99];
Example
Following is the code −
const arr = [56768, 5465, 5467, 3, 878, 878, 34435, 78799];
const splitLast = (arr, num) => {
return arr.map(el => {
if(String(el).length <= num){
return el;
};
const part = String(el).substr(String(el).length - num, num);
return +part || part;
});
};
console.log(splitLast(arr, 2));Output
This will produce the following output in console −
[ 68, 65, 67, 3, 78, 78, 35, 99 ]
Updated on: 18-Sep-2020
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