A modern programming language that makes developers happier.

kotlinlang

`Day16`
• Lesson3 in Developing Android Apps with Kotlin
    ◦ Back stack manipulation (controlling pop up behavior, setting inclusive flag)
    ◦ Using Up button (NavigationUI), Menu bar (setHasOptionsMenu, onCreateOptionsMenu, onOptionsItemSelected)
    ◦ Passing parameters from fragment to fragment using SafeArgs
        ▪︎ Fragments contain argument in form of Android Bundle(key-value form. Have to take care of data types for value.) SafeArgs(Gradle plugin) guarantees the arguments of both sides match.
• Etc. memos
    ◦ (android studio) ctrl+O shows overridable methods
    ◦ Building issues are really frustrating. :disappointed::disappointed: I imported safe args plugin but Directions class never got generated. Tried everything <https://stackoverflow.com/questions/50686907/safeargs-library-doesnt-generate-direction-class|here> but failed. Problem solved with <https://stackoverflow.com/questions/61123837/fragmentdirections-class-gamefragmentdirectionsin-this-case-not-generated-w|this>. 
`Self-Comment`
• Thinking of some side projects. Having vacation in an island is good for pulling up creativity I guess (?) Maybe I should specify ideas, throw away some, fill out documents and draw layouts in figma for selected ones.
• First time using git squash (but soon faced some git error.. I had to push force;; wt..)
• Turning off cellphone really boosts up productivity. Spent not much time today, (less than three hours?) but efficiency was nice (just except for that building issues..:exploding_head:)
`GoalsTomorrow`
• Finish lesson 3 (please) and move on to lesson 4 life cycle