Skit

文字列の先頭/末尾から特定の文字を取り除く 
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<div class="code-block-container"><pre class="language-rust"><code class="language-rust code-line" data-line="3">// 先頭から '^' を取り除く
string_value.strip_prefix("^")
// 先頭から '$' を取り除く
string_value.strip_suffix("$")
</code></pre></div>使用例
<div class="code-block-container"><pre class="language-rust"><code class="language-rust code-line" data-line="12">let string_value = String::from("^abcdefg$");
println!("strip_prefix: {:?}", string_value.strip_prefix("^"));
println!("strip_suffix: {:?}", string_value.strip_suffix("$"));
println!("string_value: {}", string_value);
</code></pre></div>実行結果
<div class="code-block-container"><pre><code class="code-line" data-line="21">strip_prefix: Some("abcdefg$")
strip_suffix: Some("^abcdefg")
string_value: ^abcdefg$
</code></pre></div>入力文字列は変わらない。 
戻り値は <code>Option&lt;&amp;str&gt;</code>