Latest tutorials

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Elasticsearch Data Types
Elasticsearch · Jun 28, 2019 · 6 min read
Keyword is used for structured content such as IDs, email addresses, hostnames, status codes, zip codes, or tags. Content of keyword data type does not get broken down like the text data type. Only a search for the exact email “folaukaveinga@gmail.com” would return it as a result. Consider mapping…
MySQL LAST_INSERT_ID
SQL · Jun 23, 2019 · 1 min read
The MySQL LAST_INSERT_ID() function returns the most recently generated integer successfully inserted for an AUTO_INCREMENT column. CREATE TABLE user( id INT AUTO_INCREMENT, name VARCHAR(250) NOT NULL …, PRIMARY KEY(id) ); If you insert multiple rows into the table using a single INSERT statement,…
MySQL Transaction
SQL · Jun 12, 2019 · 1 min read
Git restore deleted commit
Git · Jun 7, 2019 · 1 min read
Sometime you commit something but then accidentally deleted it and then you would like to bring it back or continue working on it. I had this happened to me and it was frustrating to redo everything I deleted. But then I found out there is a way to recover deleted commit. Well, you want to […]
Git reset
Git · Jun 7, 2019 · 1 min read
Get list of commits to choose from git log Git reset can change the branch pointer to point to any commit in the tree. git reset –hard <hash> $ git reset –hard 07a2a46 HEAD is now at 07a2a46 Updated index.html If you quickly check the log, you will see no history of the commits […]