JS Postać pewna liczba
var str = "Hello Lewes";
var ch = 'e';
var count = str.split("e").length - 1;
console.log(count);
/*
Output: 3
*/
Plain Pygmy
var str = "Hello Lewes";
var ch = 'e';
var count = str.split("e").length - 1;
console.log(count);
/*
Output: 3
*/
const recorrences = ['a', 'b', 'c', 'a', 'b','a']
.map(i => !!~i.indexOf('a'))
.filter(i => i)
.length;
console.log(`recorrences ${recorrences}`)
//recorrences 3let counter = str => {
return str.split('').reduce((total, letter) => {
total[letter] ? total[letter]++ : total[letter] = 1;
return total;
}, {});
};
counter("aabsssd"); // => { a: 2, b: 1, s: 3, d: 1 }