JavaScript Otwórz pierwsze 10 znaków ciągu
var str = "Hello world That is reallly neat!";
var res = str.substring(0, 5);//get first 5 chars
Grepper
var str = "Hello world That is reallly neat!";
var res = str.substring(0, 5);//get first 5 chars// the substring method returns a string out of another string
const str = 'Mozilla';
console.log(str.substring(1, 3));
// expected output: "oz"
console.log(str.substring(2));
// expected output: "zilla"
var str = "Hello world!";
var res = str.substring(1, 4); //ellconst str = 'Mozilla';
console.log(str.substring(1, 3));
// expected output: "oz"
console.log(str.substring(2));
// expected output: "zilla"const str = 'substr';
console.log(str.substr(1, 2)); // (1, 2): ub
console.log(str.substr(1)); // (1): ubstr
/* Percorrendo de trás para frente */
console.log(str.substr(-3, 2)); // (-3, 2): st
console.log(str.substr(-3)); // (-3): str
const str = "Learning to code";
// substring between index 2 and index 5
console.log(str.substring(2, 5));
// substring between index 0 and index 4
console.log(str.substring(0, 4));
// using substring() method without endIndex
console.log(str.substring(2));
console.log(str.substring(5));