Sunday, March 10, 2019

ES6 features

Reference:

https://webapplog.com/es6/

Thursday, March 7, 2019

Laravel command

php artisan make:model Notification -mcr
php artisan make:model Notification -m
php artisan migrate

php artisan migrate:rollback --step=1

php artisan migrate:rollback

php artisan migrate:refresh--step=1

php artisan make:middleware Admin

composer create-project laravel/laravel="5.5" myProject

php artisan migrate:refresh --seed

Wednesday, March 6, 2019

Git and linux common command

Git commnad

git init: (Initialize the local directory as a Git repository.)
git add: (Add the files in your new local repository. and staging)
git reset HEAD file_name: (for unstage)
git commit -m "First commit" (commit the code)
git remote add origin remote_repository_url (Sets the new remote)
git pull origin development : (pull from remote)
git push origin master (push the code)
git config --list (show the git config )
git config --system --unset credential.helper
git config --global --unset credential.helper
git config --global credential.helper manage (chage the git config: u can use any one maybe)
git log --oneline -5
git log --oneline -5 origin/development
git branch
git checkout branch_name
git cherry-pick sha1
git commit --amend
git reset HEAD~ ( git reset last commit)
git marge <branch_name> you have to location destination branch(like master)

let now you are in master branch and want to marge branch1

so command lik git marge branch1

git cherry-pick <sha1> cherry pick is used to replace in the top of current branch.
git checkout <prev_sha1> <filename> file change to sha1 commited file
git push origin -u <branch_name> it will create a branch in remote. -u = upstream
git stash "current changes keep in the drap mode"
git stash pop
git stash list
git checkout . "that means current change will be removed"
git reset c602b9fc --hard " it will remove all the commit after c602b9fc and head will be c602b9fc"
merge is used to merge two branches. follow the two steps

git checkout master
git marge <features1> merge is used to merge two branches

How do I use 'git reset --hard HEAD' to revert to a previous commit

git reset c602b9fc --hard

git push origin master --force

https://help.github.com/en/articles/adding-an-existing-project-to-github-using-the-command-line

Linux common command:

sudo tail -n 20 /var/log/nginx/error.log (to see the log of nginx server)
chmod -R <permissionsettings> <dirname> (change the folder permision and its subfolder and files)

chmod 755 -R <folder-name>

pwd (to check the current directory)
cat <filename> : is used to check file text
file edit way:********* ()

vi filename
(Enter) i
change the text
Esc
:wq
enter

exit file without saving

:q (enter)

Access EC2 using ssh

chmod 400 SPWStaging-ASDAccount.pem (first time)
ssh -i "SPWStaging-ASDAccount.pem" ec2-user@ec2-18-212-2-219.compute-1.amazonaws.com
sudo su (ec2-user is used as a super user)

wget <url> to download the from internet
unzip to extrac the file in linux
sudo useradd <user_name> adding user in linux
sudo passwd <user_name> set the password
sudo userdel <user_name> deleting the user
sudo groupadd <groupd_name> add the group in linux command
sudo touch <file_name> create the file
sudo vi <file_name> to open the file in file text check 5 point
sudo cp <file_name> <folder_name> copy the file to specific folder
sudo mv <file_name> <folder_name> to move the file
sudo rm <file_name> to remove the file
sudo mkdir <directory_name> to create a directory in linux
sudo rmdir <directory_name> to remove the directory in Linux
sudo grep -i <string_name> <file_name> just like as ctrl+f features in command line. Flag: -n, -v,-c, -i
sudo sort <file_name> sort the file string
ls -l to show the file list with permission
chown <user_name> <file_name> to change ownership of file like "Tushar(user) to root user"
chmod <permission_number (777)> <file_name> (pronounce: ch-mod/ch-own)

777 means
first 7 = user permission
second 7 = group permission
third 7 = other user of that group user

id - show the user id
tar -cvf <file_name> <source_folder_name> to zip as the file
tar -xvf <file_name> unzip tar the file
cut -c1-2 <file_name> to cut the string from the file. here c means column from 1 to 2
sed 's/<replaced_string>/<replace_by_string>' <file_name>

to replace the string in file

history <last_history_showing_number> show the list of history

history 5

free -k/-m is used to check memory space in the system
ssh-keygen -t rsa to create public private key to get access. from the next time just type enter

to generat the key

ifconfig / ip a to check the ip address
env for the environment variale
sudo app-get install pinta to install the software in ubuntu
scp -i ec2-access.pem /home/cefalo/Tushar/a2n/boilerplate/sveltekit/node_modules.zip ubuntu@ec2-63-33-70-8.eu-west-1.compute.amazonaws.com:/opt/boilerplate/boilerplate-sveltekit // upload local zip to aws ec2

Ref:

https://hackr.io/blog/basic-linux-commands
https://www.computerhope.com/unix/uchown.htm
https://www.edureka.co/blog/linux-commands/
https://www.guru99.com/must-know-linux-commands.html
https://www.howtogeek.com/412055/37-important-linux-commands-you-should-know/

ggggggggggggggggggg

Thursday, February 7, 2019

CSS trick and tips

To bring text in div middle
display:flex !important;

align-items: center

To bring li item in multiple column

column-count : 3

Complete Angular 5 tutorial link

Important Link:

https://blog.codewithdan.com/10-angular-and-typescript-projects-to-take-you-from-zero-to-hero/ (********)
http://jasonwatmore.com/post/2016/09/29/angular-2-user-registration-and-login-example-tutorial
http://bennadel.github.io/JavaScript-Demos/demos/router-lazy-load-modules-indicator-angular6/#/app/(aside:aside) (*** lazy loading loder)
https://www.bennadel.com/blog/3505-showing-a-loading-indicator-for-lazy-loaded-route-modules-in-angular-6-1-7.htm (*** lazy loading loder)

Monday, December 17, 2018

Mysql scheduler and different if else condition -- done in bjit so posting porject

DROP EVENT IF EXISTS bank_payment_pending_notification_scheduler;

DELIMITER //

CREATE EVENT bank_payment_pending_notification_scheduler

    ON SCHEDULE EVERY 1 HOUR

    STARTS CURRENT_TIMESTAMP

    DO BEGIN 

        DECLARE v_order_no VARCHAR(255);

        DECLARE v_customer_id VARCHAR(255);

        DECLARE v_first_name VARCHAR(255);

        DECLARE v_last_name VARCHAR(255);

        DECLARE v_cursor_end INT DEFAULT 0;

        DECLARE v_sender_id VARCHAR(255) DEFAULT '';

        DECLARE v_recipient_id VARCHAR(255) DEFAULT '';

        DECLARE v_title TEXT DEFAULT '';

        DECLARE v_body TEXT DEFAULT '';

        DECLARE notification_list_cursor CURSOR FOR 

            SELECT 

                orders.order_no, orders.customer_id, orders.first_name, orders.last_name 

            FROM orders LEFT JOIN (

                            SELECT DISTINCT attribute->"$.order_no" AS order_no 

                            FROM notifications 

                            WHERE attribute->"$.notification_created_for_status"  = 'bank_payment_pending' 

                                AND type_of_notification = 'Internal'

                        ) as already_notify ON already_notify.order_no = orders.order_no 

            WHERE 

                payment_status = 'pending' 

                AND payment_method = 'Bank Transfer' 

                AND order_date < NOW() - INTERVAL 2 DAY

                AND already_notify.order_no is NULL;

        DECLARE CONTINUE HANDLER FOR NOT FOUND SET v_cursor_end=1;

        OPEN notification_list_cursor;

            notification_loop: LOOP

                FETCH notification_list_cursor INTO v_order_no,v_customer_id, v_first_name,v_last_name;

                IF v_cursor_end THEN

                    LEAVE notification_loop;

                END IF;

                INSERT INTO notifications(sender_id, recipient_id, title_html, body_html, type_of_notification, attribute, is_read, created_at) 

                VALUES ('System',

                        v_customer_id, 

                        CONCAT('Bank payment pending for order no: ',v_order_no),

                        CONCAT('Bank payment pending for order no: ',v_order_no), 

                        'Internal', 

                        CONCAT('{"email_send": 1,"order_no":"',v_order_no,'", "notification_created_for_status":"bank_payment_pending"}'),

                        0 , now() );                

            END LOOP notification_loop;

        CLOSE notification_list_cursor;

        SET v_cursor_end=0;

    END; // 

DELIMITER ;

-- SET v_recipient_id = v_customer_id;

-- SET v_sender_id = 'zia.uddin@bjitgroup.com';

-- SET v_title = CONCAT('Bank payment pending for order no: ',v_order_no);

-- SET v_body = CONCAT('Bank payment pending for order no: ',v_order_no);

-- CALL mysql.lambda_async('arn:aws:lambda:us-east-1:637895362620:function:spw_send_email_notification',

--  CONCAT('{"recipient_id" : "',v_recipient_id,'","sender_id" : "',v_sender_id,'","title" : "',v_title,'","body" : "',v_body,'"}')

-- );

-- SELECT 

--     order_no, customer_id, first_name, last_name 

-- FROM orders 

-- WHERE 

--     payment_status = 'pending' 

--     AND payment_method = 'Bank Transfer' 

--     AND order_date < NOW() - INTERVAL 2 DAY

--     AND order_no NOT IN (SELECT DISTINCT attribute->"$.order_no" AS order_no FROM notifications WHERE attribute->"$.order_no" IS NOT NULL );

-- INSERT INTO notifications(sender_id, recipient_id, title_html, body_html, type_of_notification, attribute, created_at) VALUES ('System',v_customer_id, '','', 'Email', CONCAT('{"is_notify": 1,"order_no":"',v_order_no,'"}'), now() );

-- CALL mysql.lambda_async('arn:aws:lambda:eu-west-1:637895362620:function:spwSendEmailNotificationForPendingPayment',

--     CONCAT('{"order_no" : "',v_order_no,'","customer_id" : "',v_customer_id,'","first_name" : "',v_first_name,'","last_name" : "',v_last_name,'"}')

-- );

---------------------------------------------------------------------------------------------------

-- end_of_mission   

--- run daily   

-- testing

-- ON SCHEDULE EVERY 1 MINUTE

-- STARTS CURRENT_TIMESTAMP

-- ENDS CURRENT_TIMESTAMP + INTERVAL 1 HOUR

-- exact time schedule

-- ON SCHEDULE EVERY 1 DAY

-- STARTS CURRENT_TIMESTAMP

DROP EVENT IF EXISTS end_of_mission_notification_scheduler;

DELIMITER //

    CREATE EVENT end_of_mission_notification_scheduler

        ON SCHEDULE EVERY 1 DAY

        STARTS CURRENT_TIMESTAMP

    DO BEGIN 

        DECLARE v_order_no VARCHAR(255);

        DECLARE v_mission_ref_no VARCHAR(255);

        DECLARE v_customer_id VARCHAR(255);

        DECLARE v_child_customer_id VARCHAR(255);

        DECLARE v_temp_recepient_id VARCHAR(255);

        DECLARE v_end_date VARCHAR(255);

        DECLARE v_cursor_end INT DEFAULT 0;

        DECLARE notification_list_cursor CURSOR FOR 

                SELECT   

                    order_no, missions.mission_ref_no,missions.customer_id, missions.child_customer_id,(JSON_EXTRACT(`mission_data`, '$.end_date')) end_date

                FROM 

                    missions LEFT JOIN (

                            SELECT DISTINCT  

                                attribute->"$.mission_ref_no" AS mission_ref_no,

                                attribute->"$.customer_id" AS customer_id

                            FROM notifications 

                            WHERE attribute->"$.notification_created_for_status"  = 'end_of_mission' 

                                AND type_of_notification = 'Internal'

                        ) as already_notify on already_notify.mission_ref_no = missions.mission_ref_no AND  already_notify.customer_id = missions.customer_id  

                WHERE 

                    STR_TO_DATE( SPLIT_STR( JSON_UNQUOTE(JSON_EXTRACT(`mission_data`, '$.end_date')), 'T', 1),'%Y-%m-%d') <= NOW() + INTERVAL 7 DAY  

                    AND STR_TO_DATE( SPLIT_STR( JSON_UNQUOTE(JSON_EXTRACT(`mission_data`, '$.end_date')), 'T', 1),'%Y-%m-%d') >= NOW() 

                    AND already_notify.mission_ref_no is NULL;

        DECLARE CONTINUE HANDLER FOR NOT FOUND SET v_cursor_end=1;

        OPEN notification_list_cursor;

            notification_loop: LOOP

                FETCH notification_list_cursor INTO v_order_no,v_mission_ref_no, v_customer_id, v_child_customer_id, v_end_date;

                IF v_cursor_end THEN

                    LEAVE notification_loop;

                END IF;

                SET v_temp_recepient_id = v_customer_id;

                IF v_child_customer_id IS NOT NULL AND v_child_customer_id != ''   THEN

                    SET v_temp_recepient_id = v_child_customer_id;

                END IF;

                INSERT INTO notifications(sender_id, recipient_id, title_html, body_html, type_of_notification, attribute, is_read, created_at) 

                VALUES ('System',

                        v_temp_recepient_id, 

                        CONCAT('The end date of missions ',v_mission_ref_no, ' is ',SPLIT_STR( JSON_UNQUOTE(v_end_date), 'T', 1)), 

                        CONCAT('The end date of missions ',v_mission_ref_no, ' is ', SPLIT_STR( JSON_UNQUOTE(v_end_date), 'T', 1)), 

                        'Internal', 

                        CONCAT('{"email_send":0,"mission_ref_no":"',v_mission_ref_no,'", "customer_id":"',v_customer_id,'", "notification_created_for_status":"end_of_mission"  }'),

                        0, 

                        now() );

            END LOOP notification_loop;

        CLOSE notification_list_cursor;

        SET v_cursor_end=0;

    END; // 

DELIMITER ;

-------------------------------------------------------------------------------

-- run every month  

-- ON SCHEDULE EVERY 1 MINUTE

--      STARTS CURRENT_TIMESTAMP

--      ENDS CURRENT_TIMESTAMP + INTERVAL 1 HOUR

-- ON SCHEDULE EVERY 1 DAY

--          STARTS CURRENT_TIMESTAMP

--DAILY 

DROP EVENT IF EXISTS sipsi_doc_not_yet_uploaded_notification_scheduler;

DELIMITER //

    CREATE EVENT sipsi_doc_not_yet_uploaded_notification_scheduler

        ON SCHEDULE EVERY 1 DAY

        STARTS CURRENT_TIMESTAMP

    DO BEGIN 

        CALL mysql.lambda_async(get_notification_configs_bykey('spw_sipsi_doc_not_yet_uploaded_notification_api_arn'),CONCAT('{"backoffice_service_url" : "',get_notification_configs_bykey('backoffice_service_url'),'"}'));

    END; // 

DELIMITER ;

-----sql query for sipsi doc not uploaded---

-- SElECT 

--     vmil.customer_id,vmil.mission_ref_no, 

--     vmil.mission_data->'$.start_date' start_date, 

--     vmil.mission_data->'$.end_date' end_date,

--     CONCAT(mempd.first_name,' ', mempd.last_name) emp_name,

--     vmil.mission_data->'$.number_of_workers' number_of_workers,

--     mempd.doc_upload_status->"$.Once" once_file_status

-- FROM 

--     view_mission_list AS vmil 

--     left join mission_employee_details AS mempd

--         on vmil.customer_id = mempd.customer_id AND vmil.mission_ref_no = mempd.mission_ref_no 

-- WHERE

--     STR_TO_DATE( SPLIT_STR( JSON_UNQUOTE(JSON_EXTRACT(`mission_data`, '$.start_date')), 'T', 1),'%Y-%m-%d') = '2018-12-27'

--     and vmil.payment_status = 'success';

-- SElECT 

--     vmil.customer_id,vmil.mission_ref_no, 

--     vmil.mission_data->'$.start_date' start_date, 

--     vmil.mission_data->'$.end_date' end_date,

--     CONCAT(mempd.first_name,' ', mempd.last_name) emp_name,

--     vmil.mission_data->'$.number_of_workers' number_of_workers,

--     mempd.doc_upload_status->"$.m_1218" monthly_file_status

-- FROM 

--     view_mission_list AS vmil 

--     left join mission_employee_details AS mempd

--         on vmil.customer_id = mempd.customer_id AND vmil.mission_ref_no = mempd.mission_ref_no 

-- WHERE

--     ( 

--         (STR_TO_DATE( SPLIT_STR( JSON_UNQUOTE(JSON_EXTRACT(`mission_data`, '$.start_date')), 'T', 1),'%Y-%m-%d') >= '2018-12-01'  AND STR_TO_DATE( SPLIT_STR( JSON_UNQUOTE(JSON_EXTRACT(`mission_data`, '$.end_date')), 'T', 1),'%Y-%m-%d') <= '2018-12-31')

--         OR 

--         (STR_TO_DATE( SPLIT_STR( JSON_UNQUOTE(JSON_EXTRACT(`mission_data`, '$.start_date')), 'T', 1),'%Y-%m-%d') <= '2018-12-28' AND STR_TO_DATE( SPLIT_STR( JSON_UNQUOTE(JSON_EXTRACT(`mission_data`, '$.end_date')), 'T', 1),'%Y-%m-%d') >= '2018-12-29')

--         OR

--         (STR_TO_DATE( SPLIT_STR( JSON_UNQUOTE(JSON_EXTRACT(`mission_data`, '$.start_date')), 'T', 1),'%Y-%m-%d') >= '2018-12-01' AND STR_TO_DATE( SPLIT_STR( JSON_UNQUOTE(JSON_EXTRACT(`mission_data`, '$.start_date')), 'T', 1),'%Y-%m-%d') <= '2018-12-31')

--         OR 

--         (STR_TO_DATE( SPLIT_STR( JSON_UNQUOTE(JSON_EXTRACT(`mission_data`, '$.end_date')), 'T', 1),'%Y-%m-%d') >= '2018-12-01' AND STR_TO_DATE( SPLIT_STR( JSON_UNQUOTE(JSON_EXTRACT(`mission_data`, '$.end_date')), 'T', 1),'%Y-%m-%d') <= '2018-12-31')

--     )

--     and vmil.payment_status = 'success';

------------------------------------------------------------------------

-- end_of_mission email notification

--- run hourly

-- ON SCHEDULE EVERY 1 MINUTE

-- STARTS CURRENT_TIMESTAMP

-- ENDS CURRENT_TIMESTAMP + INTERVAL 1 HOUR

DROP EVENT IF EXISTS email_notification_scheduler;

DELIMITER //

    CREATE EVENT email_notification_scheduler

        ON SCHEDULE EVERY 1 HOUR

        STARTS CURRENT_TIMESTAMP

    DO BEGIN 

        DECLARE v_id INT(11);

        DECLARE v_sender_id VARCHAR(255) DEFAULT '';

        DECLARE v_recipient_id VARCHAR(255) DEFAULT '';

        DECLARE v_title TEXT DEFAULT '';

        DECLARE v_body TEXT DEFAULT '';

        DECLARE v_notification_created_for_status varchar(255);

        DECLARE v_cursor_end INT DEFAULT 0;

        DECLARE notification_list_cursor CURSOR FOR 

                SELECT   

                    notifications.id, notifications.sender_id,  notifications.recipient_id, 

                        JSON_UNQUOTE(attribute->"$.notification_created_for_status") AS notification_created_for_status                     

                FROM 

                    notifications   

                WHERE 

                    created_at <= NOW() - INTERVAL 1 DAY

                    AND is_read = 0

                    AND JSON_EXTRACT(`attribute`, '$.email_send')  = 0

                    AND type_of_notification = 'Internal'   

                    AND (JSON_UNQUOTE(JSON_EXTRACT(`attribute`, '$.notification_created_for_status')) = 'end_of_mission'

                     OR JSON_UNQUOTE(JSON_EXTRACT(`attribute`, '$.notification_created_for_status')) = 'sipsi_doc_not_yet_uploaded');

        DECLARE CONTINUE HANDLER FOR NOT FOUND SET v_cursor_end=1;

        OPEN notification_list_cursor;

            notification_loop: LOOP

                FETCH notification_list_cursor INTO v_id,v_sender_id, v_recipient_id, v_notification_created_for_status;

                IF v_cursor_end THEN

                    LEAVE notification_loop;

                END IF;

                UPDATE notifications SET `attribute` = JSON_SET(`attribute` ,'$.email_send' ,1) WHERE id = v_id;

                SET v_recipient_id = v_recipient_id;

                SET v_sender_id = get_notification_configs_bykey('sender_email_id');

                SET v_title = CONCAT('You have a unread message/alert in last 24 hours, please log into your account.');

                SET v_body = CONCAT('You have a unread message/alert in last 24 hours, please log into your account.');

                CALL mysql.lambda_async(get_notification_configs_bykey('spw_send_email_notification_lambda_fun_arn'),

                    CONCAT('{"recipient_id" : "',v_recipient_id,'","sender_id" : "',v_sender_id,'","title" : "',v_title,'","body" : "',v_body,'"}')

                );

            END LOOP notification_loop;

        CLOSE notification_list_cursor;

        SET v_cursor_end=0;

    END; // 

DELIMITER ; 

-- INTERVAL 1 DAY  

--SET v_recipient_id = 'tushar.ghosh@bjitgroup.com';

---------------------------------------TRIGGER-------------------------------------------

DROP TRIGGER IF EXISTS send_email_notification_trigger;

DELIMITER //

CREATE TRIGGER send_email_notification_trigger

AFTER INSERT

   ON notifications FOR EACH ROW

BEGIN

    DECLARE v_sender_id VARCHAR(255) DEFAULT '';

    DECLARE v_recipient_id VARCHAR(255) DEFAULT '';

    DECLARE v_title TEXT DEFAULT '';

    DECLARE v_body TEXT DEFAULT '';

    SET v_recipient_id = NEW.recipient_id;

    IF NEW.sender_id = 'System' THEN

        SET v_sender_id = get_notification_configs_bykey('sender_email_id'); 

    ELSE

        SET v_sender_id = NEW.sender_id;

    END IF;

    SET v_title = CONCAT('You have an new message/alert, please log into your account. ');

    SET v_body = CONCAT('You have an new message/alert, please log into your account.');

    CALL mysql.lambda_async(get_notification_configs_bykey('spw_send_email_notification_lambda_fun_arn'),

        CONCAT('{"recipient_id" : "',v_recipient_id,'","sender_id" : "',v_sender_id,'","title" : "',v_title,'","body" : "',v_body,'"}')

    );

END; //

DELIMITER ;

-- INSERT INTO notifications(sender_id, recipient_id, title_html, body_html, type_of_notification, attribute, is_read, created_at) 

-- VALUES ('System',

--         'tushar.ghosh@bjitgroup.com', 

--         CONCAT('Bank payment pending for order no:testing '),

--         CONCAT('Bank payment pending for order no: '), 

--         'Internal', 

--         NULL,

--         0 , now() );

---------------- -------- configs table-----------------------

DROP TABLE IF EXISTS notification_configs;

CREATE TABLE notification_configs (

    id INT(11) UNSIGNED AUTO_INCREMENT PRIMARY KEY,

    config_key VARCHAR(255) NOT NULL UNIQUE,

    config_value VARCHAR(255) NOT NULL

) 

insert into  notification_configs (config_key,config_value)

values('spw_send_email_notification_lambda_fun_arn', 'arn:aws:lambda:us-east-1:637895362620:function:spw_send_email_notification');

insert into  notification_configs (config_key,config_value)

values('spw_sipsi_doc_not_yet_uploaded_notification_api_arn', 'arn:aws:lambda:us-east-1:637895362620:function:spw_sipsi_doc_not_yet_uploaded_notification_api');

insert into  notification_configs (config_key,config_value)

values('backoffice_service_url', 'http://development.spwsystem-stage.com:3001');

insert into  notification_configs (config_key,config_value)

values('sender_email_id', 'zia.uddin@bjitgroup.com');

-------------------- function --------------------------

----get_notification_configs_bykey-----

DROP FUNCTION IF EXISTS get_notification_configs_bykey; 

DELIMITER  //  

CREATE FUNCTION get_notification_configs_bykey(p_config_key VARCHAR(255)) RETURNS VARCHAR(1000)

BEGIN

  DECLARE value_found VARCHAR(1000) DEFAULT '';

    SELECT config_value INTO value_found FROM notification_configs WHERE config_key = p_config_key;

  RETURN value_found;

END; // 

DELIMITER ;

------------------- SPLIT_STR -------- 

DROP FUNCTION IF EXISTS SPLIT_STR; 

DELIMITER  //  

CREATE FUNCTION SPLIT_STR( x VARCHAR(255), delim VARCHAR(12),pos INT ) RETURNS VARCHAR(255)

BEGIN

    RETURN REPLACE(SUBSTRING(SUBSTRING_INDEX(x, delim, pos),

       CHAR_LENGTH(SUBSTRING_INDEX(x, delim, pos -1)) + 1),

       delim, "");

END; // 

DELIMITER ;

Wednesday, October 10, 2018

Spreed operation in javascript

References:

https://codeburst.io/javascript-es6-the-spread-syntax-f5c35525f754
https://www.typescriptlang.org/docs/handbook/functions.html
https://oprea.rocks/blog/what-do-the-three-dots-mean-in-javascript/

Work Notes