2025-03-06 Meeting notes

GoLang

• packages

  • say what packages a file is in at the top

  • then you can import them

  • go.mod

    • reference internal packages through the projects github link

    • go mod commands, allows setting up aliases between nebula-api and api-tools

• syntax

  • naming variables in the return type, can be unclear

  • declare with var with type

  • := implicit typing, must be inside a function

    • then you can do = for assignment after

• types

  • no char type, only rune which supports unicode

  • no implicit casting, must be done explicitly

  • defaults to float64

  • no null type, default is nil

• for, if, switch

  • don’t need parenthesis

  • recommend the exercises!

  • you can assign and do if/switch comparison in the same line

• defer

  • put a function on the call stack while in another

  • in other words, that function is called after the current one finishes

  • ex. to close a file when done

• recover

  • when panic is called (to throw an error)

  • recover can catch this

  • you have to defer the function that intends to recover so it is run when the current function returns

• pointers

  • default to nil, not too bad compared to other languages

  • same & and * syntax as C++

• struct

  • Go isn’t object oriented but this is as close as its gets

• arrays vs. slices

  • slices can grow

• make

  • allocates the needed memory

  • append will copy over values when the allocated size is exceeded

• map

  • pretty similar to other languages

Questions

• accessing a not present map value

  • gives you its default value, nil for structs, 0 for ints