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<ul class="md-nav__list">
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<li class="md-nav__item">
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<a href="#_1" class="md-nav__link">
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线性探测
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<a href="#1" class="md-nav__link">
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1. 线性探测
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</a>
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</li>
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<a href="#_2" class="md-nav__link">
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多次哈希
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<a href="#2" class="md-nav__link">
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2. 多次哈希
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<ul class="md-nav__list">
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<li class="md-nav__item">
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<a href="#_1" class="md-nav__link">
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线性探测
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<a href="#1" class="md-nav__link">
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1. 线性探测
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</a>
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</li>
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<li class="md-nav__item">
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<a href="#_2" class="md-nav__link">
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多次哈希
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<a href="#2" class="md-nav__link">
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2. 多次哈希
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</div>
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<h2 id="622">6.2.2 开放寻址<a class="headerlink" href="#622" title="Permanent link">¶</a></h2>
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<p>「开放寻址 Open Addressing」不引入额外的数据结构,而是通过“多次探测”来处理哈希冲突,探测方式主要包括线性探测、平方探测、多次哈希等。</p>
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<h3 id="_1">线性探测<a class="headerlink" href="#_1" title="Permanent link">¶</a></h3>
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<h3 id="1">1. 线性探测<a class="headerlink" href="#1" title="Permanent link">¶</a></h3>
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<p>线性探测采用固定步长的线性查找来进行探测,对应的哈希表操作方法为:</p>
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<ul>
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<li><strong>插入元素</strong>:通过哈希函数计算数组索引,若发现桶内已有元素,则从冲突位置向后线性遍历(步长通常为 <span class="arithmatex">\(1\)</span> ),直至找到空位,将元素插入其中。</li>
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</div>
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</div>
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</div>
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<h3 id="_2">多次哈希<a class="headerlink" href="#_2" title="Permanent link">¶</a></h3>
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<h3 id="2">2. 多次哈希<a class="headerlink" href="#2" title="Permanent link">¶</a></h3>
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<p>顾名思义,多次哈希方法是使用多个哈希函数 <span class="arithmatex">\(f_1(x)\)</span> , <span class="arithmatex">\(f_2(x)\)</span> , <span class="arithmatex">\(f_3(x)\)</span> , <span class="arithmatex">\(\cdots\)</span> 进行探测。</p>
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<ul>
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<li><strong>插入元素</strong>:若哈希函数 <span class="arithmatex">\(f_1(x)\)</span> 出现冲突,则尝试 <span class="arithmatex">\(f_2(x)\)</span> ,以此类推,直到找到空位后插入元素。</li>
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