My cheat sheets journey

Ok. This is my cheat sheets.

change textview color programmatically

tv_note_point1?.setTextColor(getColor(R.color.red_600)) 

I make this notes, just in case stackoverflow goes down wkwk.

remove last character

kotlin :

val string = "<<<First Grade>>>"
println(string.drop(6)) // st Grade>>>
println(string.dropLast(6)) // <<<First Gr
println(string.dropWhile { !it.isLetter() }) // First Grade>>>
println(string.dropLastWhile { !it.isLetter() }) // <<<First Grade