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Q&A How to extract string from file, run filter, and replace in file with new value?

for file in in chapter-*.xhtml do sed -ir "12s/\b([A-Z])([A-Z]+)/\1\L\2/g;" "$file" done This -ir tells GNU-sed so alter the file in place (-i) and use regexp-extended (-r). For line 12...

posted 5mo ago by user-unknown‭  ·  edited 1mo ago by Mithical‭

Answer
#4: Post edited by user avatar Mithical‭ · 2024-03-11T18:57:40Z (about 1 month ago)
fix typo
  • ```bash
  • for file in in chapter-*.xhtml
  • do
  • sed -ir "12s/\b([A-Z])([A-Z]+)/\1\L\2/g;" "$file"[]()
  • done
  • ```
  • This `-ir` tells GNU-sed so alter the file in place (-i) and use regexp-extended (-r).
  • For line 12 substitute from word boundary an uppercase letter (1) followed by multiple uppercase letters (2) with no1 untouched, but the 2nd pattern replaced by lowercase (\L), and to repeat this procedure globally (/g).
  • Note that this will turn USB to Usb, USA to Usa, UNO to Uno and so on.
  • For reaching into subdirectories,
  • ```bash
  • find -name "chapter-*.xhtml" -exec sed -ir "12s/\b([A-Z])([A-Z]+)/\1\L\2/g;" {} ";"
  • ```
  • Again, GNU-tools (find, sed) are assumed (as default on most Linux systems).
  • ```bash
  • for file in in chapter-*.xhtml
  • do
  • sed -ir "12s/\b([A-Z])([A-Z]+)/\1\L\2/g;" "$file"
  • done
  • ```
  • This `-ir` tells GNU-sed so alter the file in place (-i) and use regexp-extended (-r).
  • For line 12 substitute from word boundary an uppercase letter (1) followed by multiple uppercase letters (2) with no1 untouched, but the 2nd pattern replaced by lowercase (\L), and to repeat this procedure globally (/g).
  • Note that this will turn USB to Usb, USA to Usa, UNO to Uno and so on.
  • For reaching into subdirectories,
  • ```bash
  • find -name "chapter-*.xhtml" -exec sed -ir "12s/\b([A-Z])([A-Z]+)/\1\L\2/g;" {} ";"
  • ```
  • Again, GNU-tools (find, sed) are assumed (as default on most Linux systems).
#3: Post edited by user avatar terdon‭ · 2024-01-08T13:43:35Z (4 months ago)
Made safe for file names with spaces or other weird characters
  • ```bash
  • for file in in chapter-*.xhtml
  • do
  • sed -ir "12s/\b([A-Z])([A-Z]+)/\1\L\2/g;" $file
  • done
  • ```
  • This `-ir` tells GNU-sed so alter the file in place (-i) and use regexp-extended (-r).
  • For line 12 substitute from word boundary an uppercase letter (1) followed by multiple uppercase letters (2) with no1 untouched, but the 2nd pattern replaced by lowercase (\L), and to repeat this procedure globally (/g).
  • Note that this will turn USB to Usb, USA to Usa, UNO to Uno and so on.
  • For reaching into subdirectories,
  • ```bash
  • find -name "chapter-*.xhtml" -exec sed -ir "12s/\b([A-Z])([A-Z]+)/\1\L\2/g;" {} ";"
  • ```
  • Again, GNU-tools (find, sed) are assumed (as default on most Linux systems).
  • ```bash
  • for file in in chapter-*.xhtml
  • do
  • sed -ir "12s/\b([A-Z])([A-Z]+)/\1\L\2/g;" "$file"[]()
  • done
  • ```
  • This `-ir` tells GNU-sed so alter the file in place (-i) and use regexp-extended (-r).
  • For line 12 substitute from word boundary an uppercase letter (1) followed by multiple uppercase letters (2) with no1 untouched, but the 2nd pattern replaced by lowercase (\L), and to repeat this procedure globally (/g).
  • Note that this will turn USB to Usb, USA to Usa, UNO to Uno and so on.
  • For reaching into subdirectories,
  • ```bash
  • find -name "chapter-*.xhtml" -exec sed -ir "12s/\b([A-Z])([A-Z]+)/\1\L\2/g;" {} ";"
  • ```
  • Again, GNU-tools (find, sed) are assumed (as default on most Linux systems).
#2: Post edited by user avatar user-unknown‭ · 2023-12-04T21:53:01Z (5 months ago)
added hint for `find` for subdirs
  • ```bash
  • for file in in chapter-*.xhtml
  • do
  • sed -ir "12s/\b([A-Z])([A-Z]+)/\1\L\2/g;" $file
  • done
  • ```
  • This `-ir` tells GNU-sed so alter the file in place (-i) and use regexp-extended (-r).
  • For line 12 substitute from word boundary an uppercase letter (1) followed by multiple uppercase letters (2) with no1 untouched, but the 2nd pattern replaced by lowercase (\L), and to repeat this procedure globally (/g).
  • Note that this will turn USB to Usb, USA to Usa, UNO to Uno and so on.
  • ```bash
  • for file in in chapter-*.xhtml
  • do
  • sed -ir "12s/\b([A-Z])([A-Z]+)/\1\L\2/g;" $file
  • done
  • ```
  • This `-ir` tells GNU-sed so alter the file in place (-i) and use regexp-extended (-r).
  • For line 12 substitute from word boundary an uppercase letter (1) followed by multiple uppercase letters (2) with no1 untouched, but the 2nd pattern replaced by lowercase (\L), and to repeat this procedure globally (/g).
  • Note that this will turn USB to Usb, USA to Usa, UNO to Uno and so on.
  • For reaching into subdirectories,
  • ```bash
  • find -name "chapter-*.xhtml" -exec sed -ir "12s/\b([A-Z])([A-Z]+)/\1\L\2/g;" {} ";"
  • ```
  • Again, GNU-tools (find, sed) are assumed (as default on most Linux systems).
#1: Initial revision by user avatar user-unknown‭ · 2023-12-04T21:50:13Z (5 months ago)
```bash
for file in in chapter-*.xhtml
do
    sed -ir "12s/\b([A-Z])([A-Z]+)/\1\L\2/g;" $file 
done
```

This `-ir` tells GNU-sed so alter the file in place (-i) and use regexp-extended (-r).

For line 12 substitute from word boundary an uppercase letter (1) followed by multiple uppercase letters (2) with no1 untouched, but the 2nd pattern replaced by lowercase (\L), and to repeat this procedure globally (/g).

Note that this will turn USB to Usb, USA to Usa, UNO to Uno and so on.