> For the complete documentation index, see [llms.txt](https://simian114.gitbook.io/blog/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://simian114.gitbook.io/blog/undefined-1/odds_and_ends/ide/rubymine/3.-completion.md).

# 3. Completion

### Basic completion

1. `ctl + Space`

   > 맥은 한영 전환 때문에 작동하지 않는다. 사용하고 싶다면 입력소스 전환 키를 바꾸자.
2. explicitly 하게 자동완성 목록을 보고 싶을 때 사용한다

### Hide completion

1. `opt + /`
   * 자동완성 목록이 뜨는게 아닌, 진짜로 자동완성을 시켜준다.
   * 만약 한번에 내가 원하는 완성이 되지 않았다면 여러 번 누르면 됨
2. `opt + shift + /`
   * 이전 자동완성으로 돌아가고 싶을

### Postfix completion

아래와 같은 코드가 있을 때 커서가 맨 뒤에 있다. 이 상태에서 이 줄을 한번에 `if`문으로 감싸는게 가능함.

```ruby
string_array.length > 1(cursor)
```

1. 맨 뒤(`post`) 에 다가 `.if` 붙이기

   ```ruby
   string_array.length > 1(cursor).if
   ```

### Completion with tab

`ctl + Space` 로는 자동완성된 단어가 `insert` 된다!! 만약 `insert`가 아니라 `replace`를 하고 싶다면?

1. `tab`을 이용하면 된다.
   * `ctl + Space`로 자동완성 목록이 뜨면 원하는 곳으로 이동 후 `tab`을 누르자.


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