Let’s say our original string is the following with repeated letters −
var values = "DDAAVIDMMMILLERRRRR";
We want to remove the repeated letters and precede letters with numbers. For this, use replace() along with regular expression.
Example
Following is the code −
var values = "DDAAVIDMMMILLERRRRR"; var precedingNumbersInString = values.replace(/(.)\1+/g, obj => obj.length + obj[0]); console.log("The original string value=" + values); console.log("String value after preceding the numbers ="); console.log(precedingNumbersInString);
To run the above program, you need to use the following command −
node fileName.js.
Here, my file name is demo295.js.
Output
This will produce the following output on console −
PS C:\Users\Amit\javascript-code> node demo295.js The original string value=DDAAVIDMMMILLERRRRR String value after preceding the numbers = 2D2AVID3MI2LE5R