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Replace all characters in a string except the ones that exist in an array JavaScript
Let’s say, we have to write a function −
replaceChar(str, arr, [char])
Now, replace all characters of string str that are not present in array of strings arr with the optional argument char. If char is not provided, replace them with ‘*’.
Let’s write the code for this function.
The full code will be −
Example
const arr = ['a', 'e', 'i', 'o', 'u'];
const text = 'I looked for Mary and Samantha at the bus station.';
const replaceChar = (str, arr, char = '*') => {
const replacedString = str.split("").map(word => {
return arr.includes(word) ? word : char;
}).join("");
return replacedString;
};
console.log(replaceChar(text, arr));Output
The console output of this code will be −
***oo*e***o***a***a****a*a***a*a****e**u****a*io**
Updated on: 19-Aug-2020
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