We are required to write a JavaScript function that takes in two strings and returns the count of the number of times the first string appears in the second string
Let’s say our string is −
const main = 'This is the is main is string';
We have to find the appearance of the below string in the above “main” string −
const sub = 'is';
Let’s write the code for this function −
Example
const main = 'This is the is main is string'; const sub = 'is'; const countAppearances = (main, sub) => { const regex = new RegExp(sub, "g"); let count = 0; main.replace(regex, (a, b) => { count++; }); return count; }; console.log(countAppearances(main, sub));
Output
Following is the output in the console −
4