basic_tips_tricks.js

// pretty log object 

var x = [{a:1}, {a:2}, {a:3}];

var log = console.log;
log(x.unshift({a:4}, {a:5}));
log(JSON.stringify(x, null, 2));

// to mysql datetime format
function twoDigits(d) {
    return d.toString().padStart(2,0);
    /*
    if(0 <= d && d < 10) return "0" + d.toString();
    if(-10 < d && d < 0) return "-0" + (-1*d).toString();
    return d.toString();*/
}


Date.prototype.toMysqlFormat = function() {
    return this.getFullYear() + "-" + twoDigits(1 + this.getMonth()) + "-" + twoDigits(this.getDate()) + " " + twoDigits(this.getHours()) + ":" + twoDigits(this.getMinutes()) + ":" + twoDigits(this.getSeconds());
};

console.log(new Date().toMysqlFormat());

// new Date().toMysqlFormat() or
// new Date(2014,12,14).toMysqlFormat() or whatever. 


// end to mysql datetime format

// iput date to mysql date

var x = "22/06/2020".split('/').reverse().join('-');
console.log(x);

// 30 minutes from now

let thirtyMinutes = 30 * 60 * 1000; // convert 30 minutes to milliseconds
let date1 = new Date();
let date2 = new Date(date1.getTime() + thirtyMinutes);
console.log(date1);
console.log(date2);


function addMinute(minutes) {

var dt = new Date();
         dt.setMinutes( dt.getMinutes() + minutes );
         return dt;

}

polyfill for Object.values

var obj = { foo: 'bar', baz: 42 };
var values = Object.keys(obj).map(function(e) {
  return obj[e]
})

console.log(values)