App-Greple
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### 3.1 `--json` åºåï¼å®æ¸¬ç¢ºèªæ¸ã¿ï¼
```json
{"type":"match","data":{"path":{"text":"sample.txt"},
"lines":{"text":"foo é«é bar\n"},"line_number":1,"absolute_offset":0,
"submatches":[{"match":{"text":"é«é"},"start":4,"end":10}]}}
```
- `absolute_offset` ã¯è¡é ã®çµ¶å¯¾ãã¤ããªãã»ããã`submatches` ã® `start/end` ã¯è¡å
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- **ãã©ã³ã¹ã³ã¼ãæï¼`-E euc-jp` ã BOM æ¤åºæï¼ã®ãªãã»ããã¯ãå¤æå¾ UTF-8 ãã¤ãååºæº**
ï¼EUC-JP ãã¡ã¤ã«ã§å®æ¸¬ç¢ºèª: `é«é` â start:4, end:10 = UTF-8 ãã¤ãä½ç½®ï¼ã
`--pre` ãã£ã«ã¿ãè§£åãåæ§ã«å¤æå¾åºæºã
- é UTF-8 ãã¼ã¿ã¯ base64ï¼`bytes` ãã¼ï¼ã§è¡¨ç¾ãããã
ãããã£ã¦ãrg ã®åºããªãã»ããã¯å¸¸ã« UTF-8 ãã¤ãåä½ãã¨ã¿ãªããgreple ã®æåãªãã»ããã¸ã®
å¤æã¯æ°å¦çã«ã¯æ´åçã«å®ç¾©ã§ããï¼ãªãã»ããã¯æé ã«å±ãã®ã§ O(N) ã®ä¸åèµ°æ»ã§å¤æå¯è½ï¼ã
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### 3.2 æ¡ B ã®å®æ¸¬: JSON çµç±ã®ãªã¼ãã¼ããã
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