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learngo/interfaces/log-parser/refactor-notes/refactor-02/changes.md
2019-08-21 20:38:07 +03:00

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### PROBLEM
+ `summarize()` knows a lot about the internals of the `parser`.
+ coupled to the `parser`.
## SOLUTION
+ remove: `parser.go` `sum` and `domains` fields
+ remove: `parser.go/newParser()`
+ change: `parser.go/parse(p *parser) error` -> `parse() ([]result, error)`
+ initialize: `sum` inside `parse()`
+ remove: `update()`
+ call: `sum` update in the `parse()`
+ collect the grouped results and return them from `parser()`
+ `summarize(p *parser)` -> `summarize([]result)`
+ in `summarize()`
+ `sort.Slice`
+ range over `[]result`
+ `main.go`
+ just: `res, err := parse()`