javascript hasownproperty
var person = {
"first_name": "Bob",
"last_name": "Dylan"
};
person.hasOwnProperty('first_name'); //returns true
person.hasOwnProperty('age'); //returns falsejavascript hasownproperty
var person = {
"first_name": "Bob",
"last_name": "Dylan"
};
person.hasOwnProperty('first_name'); //returns true
person.hasOwnProperty('age'); //returns falsejavascript sessionStorage
var setsession = window.sessionStorage.setItem("animals", "cat");
var getsession = window.sessionStorage.getItem("animals");
console.log(getsession);localecompare javascript
const a = 'réservé'; // with accents, lowercase
const b = 'RESERVE'; // no accents, uppercase
console.log(a.localeCompare(b));
// expected output: 1
console.log(a.localeCompare(b, 'en', {sensitivity: 'base'}));
// expected output: 0javascript padstart
export function padStart(number, digits = 2, emptyDigit = 0) {
let length = 0;
let n = Math.abs(number);
let absoluteNumber = n;
do {
n /= 10;
length++;
} while (n >= 1);
const prefix = Array(Math.max((digits - length) + 1, 0)).join(emptyDigit);
return number < 0 ? `-${prefix}${absoluteNumber}` : prefix + number;
}
export default padStart;Copyright © 2021 Codeinu
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