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json()
The 
json
method creates a 
JSON
equivalent column. We can use
 $table->json('options');
to store json data in database
by Luka Tatarishvili
4 years ago
0
Laravel
database
migrations
laravel official doc
0
Object creation in Javascript
1)Literal Notation It's comma delimited list of 0 or more pairs of property names and values enclosed in curly braces
let car = {
    mark: 'Toyota',
    model: 'AE86',
    drift: function(place){ //method
        return 'car is drifting on the ' + place;
    }

};
--------------------------------------------------------------------------------------------------------------------------------------------------- 2)Object() constructor The Object constructor creates an object wrapper for the given value
let car = new Object();

car.mark = 'Toyota';
car.model = 'AE86';
car.drift = function(place){
    return this.mark+ ' is drifting on the ' + place;
}

new Object('text')
gives us String object, 
new Object(123)
gives us Number object and so on, anything other than null/undefined given to this constructor will create wrapper for that value___________ 3)Constructor functions Blueprint function to create any number of objects that are the same type and inherit the same functionality
function Car(mark, model, speed){
    this.mark = mark;
    this.model = model;
    this.speed = speed;
}
Car.prototype.drift = function(place){
    return this.mark+ ' is drifting on the ' + place;
}

let car1 = new Car('Toyota', 'AE86', 240);
let car2 = new Car('Subaru', 'Impreza', 200);
this keyword is an object that owns the code but in this context it is meant to be the newly created object by this constructor --------------------------------------------------------------------------------------------------------------------------------------------------- 4)Object.create() method 
let car = Object.create({});

car.mark = 'Toyota';
car.model = 'AE86';
car.drift = function(place){
    return this.mark+ ' is drifting on the ' + place;
}
giving null/undefined to 
create
method will cause newly created object to have no prototype, which by default should be 
Object.prototype
, or alternatively you can use prototype of another constructor function 
let car = Object.create(Car.prototype)
or object itself to set a new prototype of an object 
let car = Object.create({prototype_property1: 'value1'})
you can also use 
property descriptor
to assign properties more precisely as you desire 
let car2 = Object.create({}, {
    mark: {
        value: 'Toyota'
        writable: true  // false by default
        enumerable: true  // false by default
        configurable: true  // false by default
    },
    model: {
        value: 'AE86'
    },
    speed: {
        value: 240
    },
    drift: {
        value: function(place){
            return this.mark+ ' is drifting on the ' + place;
        }
    },
})
--------------------------------------------------------------------------------------------------------------------------------------------------- 5)ES6 class syntax WARNING: ES6 features might not be available for older version of some browsers 
class Car{
    constructor(mark, model, speed){
        this.mark = mark;
        this.model = model;
        this.speed = speed;
    }
    drift(place){
        return this.mark+ ' is drifting on the ' + place;
    }
}
this is basically the same as constructor function but the different syntax --------------------------------------------------------------------------------------------------------------------------------------------------- 6)singleton pattern downside of this is that you can't create many instances and methods will repeat 
let car = new function(){
    this.mark = 'Toyota';
    this.model = 'AE86';
    this.speed = 240;
    this.drift = function(place){
        return this.mark+ ' is drifting on the ' + place;
    }
}
by გიორგი უზნაძე
4 years ago
0
JavaScript
Beginner
Object
0
Call two functions from same onclick
Add semi-colons 
;
to the end of the function calls in order for them both to work. 
<input id="btn" type="button" value="click" onclick="pay(); cls();"/>
by Luka Tatarishvili
4 years ago
0
HTML
JavaScript
functions
0
Deal with multiple traits conflicts CODE 

trait A
{
    private function smallTalk()
    {
        echo 'a';
    }

    private function bigTalk()
    {
        echo 'A';
    }
}

trait B
{
    private function smallTalk()
    {
        echo 'b';
    }

    private function bigTalk()
    {
        echo 'B';
    }
}

trait C
{
    public function smallTalk()
    {
        echo 'c';
    }

    public function bigTalk()
    {
        echo 'C';
    }
}

class Talker
{
    use A, B, C {
        //visibility for methods that will be involved in conflict resolution
        B::smallTalk as public;
        A::bigTalk as public;

        //conflict resolution
        B::smallTalk insteadof A, C;
        A::bigTalk insteadof B, C;

        //aliases with visibility change
        B::bigTalk as public Btalk;
        A::smallTalk as public asmalltalk;
       
        //aliases only, methods already defined as public
        C::bigTalk as Ctalk;
        C::smallTalk as cmallstalk;
    }

}

(new Talker)->bigTalk();//A
(new Talker)->Btalk();//B
(new Talker)->Ctalk();//C

(new Talker)->asmalltalk();//a
(new Talker)->smallTalk();//b
(new Talker)->cmallstalk();//c
by გიორგი უზნაძე
4 years ago
0
PHP
OOP
Traits
0
Trait static property and function
A static property (trvar) can only be accessed using the classname (C1). But a static function (stfunc) can be accessed using the classname or the instance ($obj). 
trait Counter {
    static $trvar=1;

    public static function stfunc() {
        echo "Hello world!"
    }
}
class C1 {
    use Counter;
}

print "\nTRVAR: " . C1::$trvar . "\n";   //prints 1

$obj = new C1();
C1::stfunc();   //prints  Hello world!
$obj->stfunc();   //prints Hello world!
by გიორგი უზნაძე
4 years ago
0
PHP
OOP
Traits
0
Why we use async and await in JavaScript? 
Async/Await
was created to simplify the process of working with and writing chained promises. 
Async
functions return a Promise. If the function throws an error, the Promise will be rejected. If the function returns a value, the Promise will be resolved.
by Luka Tatarishvili
4 years ago
0
HTML
JavaScript
functions
0
use "previousElementSibling" instead of "previousSibling" to avoid whitespace as node
by გიორგი უზნაძე
4 years ago
0
JavaScript
DOM
0
Get sum of multiple average grouped by specific column 
SELECT SUM(avg1) FROM (SELECT user_id, AVG(score) as avg1 FROM results GROUP BY user_id)
in this case results table might have multiple records on 1 user id so basically it gets average score of all users and than sums all average number
by გიორგი უზნაძე
4 years ago
0
MySQL
0
Dinamic scroll 
html {
  scroll-behavior: smooth;
}
The scroll-behavior CSS property sets the behavior for a scrolling box
As default it's 
auto
but if we use scroll-behavior: smooth; the scroll will be animated and smooth. In HTML 
<div class="main" id="section1">
  <h2>Section 1</h2>
<a href="#section2">Click Me to Smooth Scroll to Section 2 Below</a>
</div>
Div's must have specified 
id="someid"
which will be passed in a href attribute. 
<a href="#someid">1</a>
With Jquery we can make it more manageable. We can specify exact pixels and positions. 

let id = $(this).closest('li').attr('id');

$('html, body').animate({
                 scrollTop: $('div#section-content-'+id).offset().top - 200
             }, 1000);
by Luka Tatarishvili
4 years ago
0
CSS
HTML
animation
0
Difference between position:sticky and position:fixed? 
position: fixed
always fixates an element to some position within its scrolling container. no matter how you scroll its container.. 
position: sticky
basically acts like 
position: relative
until an element is scrolled beyond a specific offset, in which case it turns into 
position: fixed
by Luka Tatarishvili
4 years ago
0
CSS
HTML
Animation
0
Results: 1580