LeetCode 709. To Lower Case (LaTeX)
10 Jun 2020Implement function ToLowerCase() that has a string parameter str, and returns the same string in lowercase.
Example
Example 1:
Input: "Hello"
Output: "hello"
Example 2:
Input: "here"
Output: "here"
Example 2:
Input: "LOVELY"
Output: "lovely"
Solution
\documentclass{article}
\usepackage[T1]{fontenc}
\usepackage{datetime2}
\usepackage{expl3}
\begin{document}
\setlength{\parindent}{0cm}
\ExplSyntaxOn
\cs_set:Npn \to_lower_case #1 {
\tl_set:Nx \l_tmpa_tl {\tl_lower_case:n {#1}}
\tl_use:N \l_tmpa_tl
}
\par\to_lower_case{Hello}
\par\to_lower_case{here}
\par\to_lower_case{LOVELY}
\ExplSyntaxOff
\DTMnow
\end{document}
Output
hello
here
lovely
2020-06-10 17:44:18-04:00