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Find the first occurrence of any of the characters within the string.
constexpr size_type find_first_of( const_pointer s, size_type pos, size_type n) const;
Finds the first occurrence of any of the characters within the string
pointed to by s within
the string starting at the index pos.
Linear.
The index corrosponding to the first occurrence of any of the characters
in {s, s + n) within {begin() + pos, end()) if it exists, and npos otherwise.
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Description |
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The characters to search for. |
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The index to start searching at. |
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The length of the string to search for. |