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<div class="section" id="geopos-key-member-member">
<span id="geopos"></span><h1>GEOPOS key member [member …]<a class="headerlink" href="#geopos-key-member-member" title="Permalink to this headline">¶</a></h1>
<blockquote>
<div><div class="line-block">
<div class="line">可用版本： >= 3.2.0</div>
<div class="line">时间复杂度： 获取每个位置元素的复杂度为 O(log(N)) ， 其中 N 为键里面包含的位置元素数量。</div>
</div>
</div></blockquote>
<p>从键里面返回所有给定位置元素的位置（经度和纬度）。</p>
<p>因为 <code class="docutils literal"><span class="pre">GEOPOS</span></code> 命令接受可变数量的位置元素作为输入，
所以即使用户只给定了一个位置元素，
命令也会返回数组回复。</p>
<div class="section" id="id1">
<h2>返回值<a class="headerlink" href="#id1" title="Permalink to this headline">¶</a></h2>
<p><code class="docutils literal"><span class="pre">GEOPOS</span></code> 命令返回一个数组， 数组中的每个项都由两个元素组成： 第一个元素为给定位置元素的经度， 而第二个元素则为给定位置元素的纬度。
当给定的位置元素不存在时， 对应的数组项为空值。</p>
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<div class="section" id="id2">
<h2>代码示例<a class="headerlink" href="#id2" title="Permalink to this headline">¶</a></h2>
<div class="highlight-default"><div class="highlight"><pre><span></span><span class="n">redis</span><span class="o">></span> <span class="n">GEOADD</span> <span class="n">Sicily</span> <span class="mf">13.361389</span> <span class="mf">38.115556</span> <span class="s2">"Palermo"</span> <span class="mf">15.087269</span> <span class="mf">37.502669</span> <span class="s2">"Catania"</span>
<span class="p">(</span><span class="n">integer</span><span class="p">)</span> <span class="mi">2</span>
<span class="n">redis</span><span class="o">></span> <span class="n">GEOPOS</span> <span class="n">Sicily</span> <span class="n">Palermo</span> <span class="n">Catania</span> <span class="n">NonExisting</span>
<span class="mi">1</span><span class="p">)</span> <span class="mi">1</span><span class="p">)</span> <span class="s2">"13.361389338970184"</span>
<span class="mi">2</span><span class="p">)</span> <span class="s2">"38.115556395496299"</span>
<span class="mi">2</span><span class="p">)</span> <span class="mi">1</span><span class="p">)</span> <span class="s2">"15.087267458438873"</span>
<span class="mi">2</span><span class="p">)</span> <span class="s2">"37.50266842333162"</span>
<span class="mi">3</span><span class="p">)</span> <span class="p">(</span><span class="n">nil</span><span class="p">)</span>
</pre></div>
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