find common characters in two strings javascript
var s1 = "abcd";
var s2 = "aad";
var count=0;
function match(s1,s2)
{
for(let i in s1)
s2.includes(s1[i])?count++:false;
console.log(count)
}
match(s1,s2)
most popular letter in str javascript
var getMax = function (str) {
var max = 0,
maxChar = '';
str.split('').forEach(function(char){
if(str.split(char).length > max) {
max = str.split(char).length;
maxChar = char;
}
});
return maxChar;
};