javascript

<script type="text/javascript" src="https://momentjs.com/downloads/moment.min.js">

moment.utc('2017-04-03 12:43:52.0').local().format('YYYY-MM-DD HH:mm:ss');

</script>

document.write('<script type="text/javascript" src="https://momentjs.com/downloads/moment.min.js"></script>');

moment.utc('2017-04-03 12:43:52.0').local().format('YYYY-MM-DD HH:mm:ss');

document.write('<script src="https://ajax.googleapis.com/ajax/libs/jquery/3.2.1/jquery.min.js"></script>');

a=5;

var numLogger = setInterval(()=>{a+=5; console.log(a);}, 1000);

clearInterval(numLogger);

var logger=setInterval(function(){console.log("Hello " + new Date().getTime())}, 1000);

clearInterval(logger);

var timeoutEx = setTimeout(function(){console.log('Hello World! ' + new Date());}, 1000);

clearTimeout(timeoutEx);

--------------------------EX-------------

a=5;

var numLogger = setInterval(()=>{a+=5; console.log(a);if(a>20){clearInterval(numLogger); console.log("checking ");}}, 1000);

objectArray=[{'name':'Ajay', age:18}, {'name':'Bob', age:46}, {'name':'Chris', age:27}]

ages=objectArray.map(function(entry){return entry.age;})

names=objectArray.map(efunction(entry){return entry.name;})

var a=['as', 'we', 'cx', 'fg'];

a.pop(); //returns last [i.e- rightmost] element 'fg' removing it from a.

a.shift(); //returns first [i.e- leftmost] element 'as' removing it from a.

a.push("xy"); //adds a new element to right/bottom/last in array a.

a.unshift("za"); //adds a new element to left/top/first in array a.

document.addEventListener("click", function(event){

    alert("Was Clicked!" + document.getElementFromPoint(event.clientX, event.clientY));

});

var str = "Visit W3Schools!";

var n = str.search("W3Schools"); //n=6

document.getSelection().anchorNode.data.substr(document.getSelection().anchorOffset, document.getSelection().focusOffset - document.getSelection().anchorOffset);

a=[{aq:'sdf', ab:'er', id:2}, {aq:'www', ab:'q1q', id:1}, {aq:'rr', id:5}]

b=a.sort(function(a,b){return a.id-b.id});

console.log(JSON.stringify(b));

e.g- To sort date time

a=["2017:09:11 14:39:00", "2017:09:11 14:56:00", "2017:09:11 11:39:00"]

a.sort(function(a,b){

ar=a.replace(/ /g, '').replace(/:/g, ''); br=b.replace(/ /g, '').replace(/:/g, ''); console.log(ar, br); return ar-br;})

#result:[ "2017:09:11 11:39:00", "2017:09:11 14:39:00", "2017:09:11 14:56:00" ]

delete <MAPNAME>.<KEY>

a=44.45897  #How to round this to 2 digit after decimal

a.toFixed(2)  #returns 44.46

a={'asd':12}

b={'er':22, 'asd': 67}

Object.assign({}, b, a) # Result object will have keys from both object and values of later overrides the previous.

a=["2017:09:11 14:39:00", "2017:09:11 14:56:00", "2017:09:11 11:39:00"]

b=a.map(function(i){return i;});

var arr = [{x: 1}, {x:2, y: 5}, {x: 4}]; //sample data, out of which we like to have total of x in each object.

arr.reduce(function (a, b) {

  return {x: a.x + b.x}; // returns object(as total) with property x

});  #Returns {x:7}

function setCookie(cname, cvalue, exdays) {

    var d = new Date();

    d.setTime(d.getTime() + (exdays*24*60*60*1000));

    var expires = "expires="+ d.toUTCString();

    document.cookie = cname + "=" + cvalue + ";" + expires + ";path=/";

}

function getCookie(cname) {

    var name = cname + "=";

    var decodedCookie = decodeURIComponent(document.cookie);

    var ca = decodedCookie.split(';');

    for(var i = 0; i <ca.length; i++) {

        var c = ca[i];

        while (c.charAt(0) == ' ') {

            c = c.substring(1);

        }

        if (c.indexOf(name) == 0) {

            return c.substring(name.length, c.length);

        }

    }

    return "";

}