Everyone’s favorite: print function

• Generally we use Printf or Println and other print function variants to print the variable to what’s the value
• With Printf we can have format specifiers to format the variables especially complex ones
  • %v: will only print values without keys
  • %+v: will print values with keys
  • %#v: will print variable type along with keys in variable, it’s more verbose than #+v format specifier
  • %T: will represent the type of the variable
  • Example: https://go.dev/play/p/yHGoKST0lEx

Debugger

delve

Features

• Set breakpoints
• Inspect goroutines
• evaluate and manipulate variables in real-time

Installation

• go install github.com/go-delve/delve/cmd/dlv@latest
• check if it’s accessiable through cli by running checking the version: dlv version
  • if it’s not accessiable then $GOPATH/bin is not in your $PATH

Running with delve

• dlv debug GO_PROGRAM_ENTRY_FILE_PATH GO_PROGRAM_PARAMETERS_IF_ANY