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feat: add matlab.md cheatsheet (#21). 02d0a495a6

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jaywcjlove
2022-11-04 13:08:05 +00:00
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@ -217,7 +217,7 @@
<table><thead><tr><th align="left">代码</th><th>描述</th></tr></thead><tbody><tr><td align="left"><code>${FOO%suffix}</code></td><td>删除后缀</td></tr><tr><td align="left"><code>${FOO#prefix}</code></td><td>删除前缀</td></tr><tr><td align="left"><code>${FOO%%suffix}</code></td><td>去掉长后缀</td></tr><tr><td align="left"><code>${FOO##prefix}</code></td><td>删除长前缀</td></tr><tr><td align="left"><code>${FOO/from/to}</code></td><td>替换第一个匹配项</td></tr><tr><td align="left"><code>${FOO//from/to}</code></td><td>全部替换</td></tr><tr><td align="left"><code>${FOO/%from/to}</code></td><td>替换后缀</td></tr><tr><td align="left"><code>${FOO/#from/to}</code></td><td>替换前缀</td></tr></tbody></table>
</div></div><div class="h3wrap-body"><h4 id="子字符串"><a aria-hidden="true" tabindex="-1" href="#子字符串"><span class="icon icon-link"></span></a>子字符串</h4>
<h4 id="子字符串"><a aria-hidden="true" tabindex="-1" href="#子字符串"><span class="icon icon-link"></span></a>子字符串</h4>
@ -278,7 +278,7 @@
<table><thead><tr><th align="left">表示</th><th>描述</th></tr></thead><tbody><tr><td align="left"><code>${FOO:-val}</code></td><td><code>$FOO</code>，如果未设置，则为 <code>val</code></td></tr><tr><td align="left"><code>${FOO:=val}</code></td><td>如果未设置，则将 <code>$FOO</code> 设置为 <code>val</code></td></tr><tr><td align="left"><code>${FOO:+val}</code></td><td><code>val</code> 如果设置了<code>$FOO</code></td></tr><tr><td align="left"><code>${FOO:?message}</code></td><td>如果 <code>$FOO</code> 未设置，则显示消息并退出</td></tr></tbody></table>
</div></div><div class="wrap h3body-not-exist"><div class="wrap-header h3wrap"><h3 id="替代-substitution"><a aria-hidden="true" tabindex="-1" href="#替代-substitution"><span class="icon icon-link"></span></a>替代 Substitution</h3><div class="wrap-body">
</div></div></div><div class="wrap h3body-not-exist"><div class="wrap-header h3wrap"><h3 id="替代-substitution"><a aria-hidden="true" tabindex="-1" href="#替代-substitution"><span class="icon icon-link"></span></a>替代 Substitution</h3><div class="wrap-body">
<pre class="language-bash"><code class="language-bash code-highlight"><span class="code-line"><span class="token builtin class-name">echo</span> <span class="token variable">${food<span class="token operator">:-</span>Cake}</span> <span class="token comment">#=> $food or "Cake"</span>
</span></code></pre>
<pre class="language-bash"><code class="language-bash code-highlight"><span class="code-line"><span class="token assign-left variable">STR</span><span class="token operator">=</span><span class="token string">"/path/to/foo.cpp"</span>
@ -398,12 +398,12 @@
</span><span class="code-line"> <span class="token builtin class-name">echo</span> <span class="token variable">$e</span>
</span><span class="code-line"><span class="token keyword">done</span>
</span></code></pre>
</div></div><div class="h3wrap-body"><h4 id="with-index"><a aria-hidden="true" tabindex="-1" href="#with-index"><span class="icon icon-link"></span></a>With index</h4>
<h4 id="with-index"><a aria-hidden="true" tabindex="-1" href="#with-index"><span class="icon icon-link"></span></a>With index</h4>
<pre class="language-bash"><code class="language-bash code-highlight"><span class="code-line"><span class="token keyword">for</span> <span class="token for-or-select variable">i</span> <span class="token keyword">in</span> <span class="token string">"<span class="token variable">${<span class="token operator">!</span>Fruits<span class="token punctuation">[</span>@<span class="token punctuation">]</span>}</span>"</span><span class="token punctuation">;</span> <span class="token keyword">do</span>
</span><span class="code-line"> <span class="token builtin class-name">printf</span> <span class="token string">"%s<span class="token entity" title="\t">\t</span>%s<span class="token entity" title="\n">\n</span>"</span> <span class="token string">"<span class="token variable">$i</span>"</span> <span class="token string">"<span class="token variable">${Fruits<span class="token punctuation">[</span>$i<span class="token punctuation">]</span>}</span>"</span>
</span><span class="code-line"><span class="token keyword">done</span>
</span></code></pre>
</div></div><div class="wrap h3body-not-exist col-span-2"><div class="wrap-header h3wrap"><h3 id="操作"><a aria-hidden="true" tabindex="-1" href="#操作"><span class="icon icon-link"></span></a>操作</h3><div class="wrap-body">
</div></div></div><div class="wrap h3body-not-exist col-span-2"><div class="wrap-header h3wrap"><h3 id="操作"><a aria-hidden="true" tabindex="-1" href="#操作"><span class="icon icon-link"></span></a>操作</h3><div class="wrap-body">
<!--rehype:wrap-class=col-span-2-->
<pre class="language-bash"><code class="language-bash code-highlight"><span class="code-line"><span class="token assign-left variable">Fruits</span><span class="token operator">=</span><span class="token punctuation">(</span><span class="token string">"<span class="token variable">${Fruits<span class="token punctuation">[</span>@<span class="token punctuation">]</span>}</span>"</span> <span class="token string">"Watermelon"</span><span class="token punctuation">)</span> <span class="token comment"># 推</span>
</span><span class="code-line"><span class="token assign-left variable">Fruits</span><span class="token operator">+=</span><span class="token punctuation">(</span><span class="token string">'Watermelon'</span><span class="token punctuation">)</span> <span class="token comment"># 也推</span>
@ -546,7 +546,7 @@
<table><thead><tr><th align="left">条件</th><th>描述</th></tr></thead><tbody><tr><td align="left"><code>[[ -z STR ]]</code></td><td>空字符串</td></tr><tr><td align="left"><code>[[ -n STR ]]</code></td><td><yel>非</yel>空字符串</td></tr><tr><td align="left"><code>[[ STR == STR ]]</code></td><td>平等的</td></tr><tr><td align="left"><code>[[ STR = STR ]]</code></td><td>相等（同上）</td></tr><tr><td align="left"><code>[[ STR &#x3C; STR ]]</code></td><td>小于 <em>(ASCII)</em></td></tr><tr><td align="left"><code>[[ STR > STR ]]</code></td><td>大于 <em>(ASCII)</em></td></tr><tr><td align="left"><code>[[ STR != STR ]]</code></td><td>不相等</td></tr><tr><td align="left"><code>[[ STR =~ STR ]]</code></td><td>正则表达式</td></tr></tbody></table>
</div></div></div><div class="wrap h3body-exist row-span-3"><div class="wrap-header h3wrap"><h3 id="例子"><a aria-hidden="true" tabindex="-1" href="#例子"><span class="icon icon-link"></span></a>例子</h3><div class="wrap-body">
<!--rehype:wrap-class=row-span-3-->
</div></div><div class="h3wrap-body"><h4 id="字符串"><a aria-hidden="true" tabindex="-1" href="#字符串"><span class="icon icon-link"></span></a>字符串</h4>
<h4 id="字符串"><a aria-hidden="true" tabindex="-1" href="#字符串"><span class="icon icon-link"></span></a>字符串</h4>
<pre class="language-bash"><code class="language-bash code-highlight"><span class="code-line"><span class="token keyword">if</span> <span class="token punctuation">[</span><span class="token punctuation">[</span> <span class="token parameter variable">-z</span> <span class="token string">"<span class="token variable">$string</span>"</span> <span class="token punctuation">]</span><span class="token punctuation">]</span><span class="token punctuation">;</span> <span class="token keyword">then</span>
</span><span class="code-line"> <span class="token builtin class-name">echo</span> <span class="token string">"String is empty"</span>
</span><span class="code-line"><span class="token keyword">elif</span> <span class="token punctuation">[</span><span class="token punctuation">[</span> <span class="token parameter variable">-n</span> <span class="token string">"<span class="token variable">$string</span>"</span> <span class="token punctuation">]</span><span class="token punctuation">]</span><span class="token punctuation">;</span> <span class="token keyword">then</span>
@ -580,7 +580,7 @@
</span><span class="code-line"> <span class="token builtin class-name">echo</span> <span class="token string">"file exists"</span>
</span><span class="code-line"><span class="token keyword">fi</span>
</span></code></pre>
</div></div><div class="wrap h3body-not-exist row-span-2"><div class="wrap-header h3wrap"><h3 id="文件条件"><a aria-hidden="true" tabindex="-1" href="#文件条件"><span class="icon icon-link"></span></a>文件条件</h3><div class="wrap-body">
</div></div></div><div class="wrap h3body-not-exist row-span-2"><div class="wrap-header h3wrap"><h3 id="文件条件"><a aria-hidden="true" tabindex="-1" href="#文件条件"><span class="icon icon-link"></span></a>文件条件</h3><div class="wrap-body">
<!--rehype:wrap-class=row-span-2-->
@ -688,12 +688,12 @@
</span><span class="code-line"> <span class="token builtin class-name">echo</span> <span class="token string">"Welcome <span class="token variable">$i</span>"</span>
</span><span class="code-line"><span class="token keyword">done</span>
</span></code></pre>
</div></div><div class="h3wrap-body"><h4 id="具有步长"><a aria-hidden="true" tabindex="-1" href="#具有步长"><span class="icon icon-link"></span></a>具有步长</h4>
<h4 id="具有步长"><a aria-hidden="true" tabindex="-1" href="#具有步长"><span class="icon icon-link"></span></a>具有步长</h4>
<pre class="language-bash"><code class="language-bash code-highlight"><span class="code-line"><span class="token keyword">for</span> <span class="token for-or-select variable">i</span> <span class="token keyword">in</span> <span class="token punctuation">{</span><span class="token number">5</span><span class="token punctuation">..</span><span class="token number">50</span><span class="token punctuation">..</span><span class="token number">5</span><span class="token punctuation">}</span><span class="token punctuation">;</span> <span class="token keyword">do</span>
</span><span class="code-line"> <span class="token builtin class-name">echo</span> <span class="token string">"Welcome <span class="token variable">$i</span>"</span>
</span><span class="code-line"><span class="token keyword">done</span>
</span></code></pre>
</div></div><div class="wrap h3body-not-exist"><div class="wrap-header h3wrap"><h3 id="自动递增"><a aria-hidden="true" tabindex="-1" href="#自动递增"><span class="icon icon-link"></span></a>自动递增</h3><div class="wrap-body">
</div></div></div><div class="wrap h3body-not-exist"><div class="wrap-header h3wrap"><h3 id="自动递增"><a aria-hidden="true" tabindex="-1" href="#自动递增"><span class="icon icon-link"></span></a>自动递增</h3><div class="wrap-body">
<pre class="language-bash"><code class="language-bash code-highlight"><span class="code-line"><span class="token assign-left variable">i</span><span class="token operator">=</span><span class="token number">1</span>
</span><span class="code-line"><span class="token keyword">while</span> <span class="token punctuation">[</span><span class="token punctuation">[</span> <span class="token variable">$i</span> <span class="token parameter variable">-lt</span> <span class="token number">4</span> <span class="token punctuation">]</span><span class="token punctuation">]</span><span class="token punctuation">;</span> <span class="token keyword">do</span>
</span><span class="code-line"> <span class="token builtin class-name">echo</span> <span class="token string">"Number: <span class="token variable">$i</span>"</span>
@ -1129,7 +1129,7 @@
<li><a href="https://www.shellcheck.net/">ShellCheck</a> <em>(shellcheck.net)</em></li>
<li><a href="https://devmanual.gentoo.org/tools-reference/bash/index.html">shell - Standard Shell</a> <em>(devmanual.gentoo.org)</em></li>
</ul>
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