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joaquinelio 2021-03-02 10:28:52 -03:00 • committed by GitHub
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9-regular-expressions/14-regexp-lookahead-lookbehind/2-insert-after-head/solution.md
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@ -31,6 +31,6 @@ It works like this:
The tag `pattern:<body.*?>` won't be returned. The result of this regexp is literally an empty string, but it matches only at positions preceeded by `pattern:<body.*?>`.
So we replaces the "empty line", preceeded by `pattern:<body.*?>`, with `<h1>Hello</h1>`. That's the insertion after `<body>`.
So it replaces the "empty line", preceeded by `pattern:<body.*?>`, with `<h1>Hello</h1>`. That's the insertion after `<body>`.
P.S. Regexp flags, such as `pattern:s` and `pattern:i` can also be useful: `pattern:/<body.*?>/si`. The `pattern:s` flag makes the dot `pattern:.` match a newline character, and `pattern:i` flag makes `pattern:<body>` also match `match:<BODY>` case-insensitively.