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Last active March 18, 2023 00:42
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bash わからん
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bash-substitution.md

bash の文字列置換

1.置換

  • / 演算子を使う。
  • "${variable/pattern/substitution}" の形で指定する
  • pattern の部分にマッチした一番最初の場所だけが書き換えられる
  • / の後に / が続く場合は、 pattern にマッチする部分が全て書き換えられる。

例

echo "${PWD}" # -> /tmp/docs/2023-03-16
echo "${PWD/2/two}" # -> /tmp/docs/two023-03-16
echo "${PWD//-//}" # -> /tmp/docs/2023/03/16
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