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doc: update docs/lua.md (#661)

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* Update lua.md

* Update lua.md

* Update lua.md df9c2ac08b
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jaywcjlove
2024-06-08 17:43:35 +00:00
parent f38bd5d8ae
commit 89bdff9a4e
4 changed files with 5 additions and 5 deletions
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@ -507,8 +507,8 @@
</span><span class="code-line">
</span><span class="code-line"><span class="token comment">-- 指定替换的字符串个数, 最后一个参数可选，默认是全部替换</span>
</span><span class="code-line">string<span class="token punctuation">.</span><span class="token function">gsub</span><span class="token punctuation">(</span><span class="token string">"aaaa"</span><span class="token punctuation">,</span> <span class="token string">"a"</span><span class="token punctuation">,</span> <span class="token string">"b"</span><span class="token punctuation">,</span> <span class="token number">3</span><span class="token punctuation">)</span> <span class="token comment">-- bbba 3</span>
</span><span class="code-line">string<span class="token punctuation">.</span><span class="token function">gsub</span><span class="token punctuation">(</span><span class="token string">"Today is 29/01/2019"</span><span class="token punctuation">,</span> <span class="token string">"%d%d/%d%d/%d%d%d%d"</span><span class="token punctuation">,</span> <span class="token string">"good day."</span><span class="token punctuation">)</span>
</span><span class="code-line"><span class="token comment">-- Today is a good day. 1</span>
</span><span class="code-line">string<span class="token punctuation">.</span><span class="token function">gsub</span><span class="token punctuation">(</span><span class="token string">"Today is 29/01/2019"</span><span class="token punctuation">,</span> <span class="token string">"%d%d/%d%d/%d%d%d%d"</span><span class="token punctuation">,</span> <span class="token string">"a good day."</span><span class="token punctuation">)</span>
</span><span class="code-line"><span class="token comment">-- Today is a good day.</span>
</span><span class="code-line">
</span><span class="code-line"><span class="token comment">-- 查找第一个匹配的字符串，第三个参数可以提供开始查找的位置，默认从 1 开始</span>
</span><span class="code-line"><span class="token comment">-- 如果未找到，则返回 nil</span>