https://ruby-china.org/bysxiang en-us <pre class="highlight ruby"><code><span class="n">h</span> <span class="o">=</span> <span class="no">Hash</span><span class="p">.</span><span class="nf">new</span><span class="p">(</span><span class="s1">'java'</span><span class="p">)</span> <span class="n">h</span><span class="p">[</span><span class="ss">:a</span><span class="p">]</span> <span class="o">=</span> <span class="mi">33</span> <span class="n">h</span><span class="p">.</span><span class="nf">default</span><span class="p">()</span> <span class="c1">#=&gt; 'java'</span> <span class="n">h</span><span class="p">.</span><span class="nf">default</span><span class="p">(</span><span class="ss">:a</span><span class="p">)</span> <span class="c1">#=&gt; 'java'</span> <span class="n">h</span><span class="p">.</span><span class="nf">default</span><span class="p">(</span><span class="ss">:b</span><span class="p">)</span> <span class="c1">#=&gt; 'java'</span> </code></pre> <p>按 Ruby 文档说法，default() 不提供参数，或参数 (key) 不存在时，返回默认值。key 存在，返回键对应的值。</p> <p>可结果却不一样，这是 bug 吗？ruby-2.0.0-p648, ruby-2.3 都是一样的结果</p> bysxiang Sun, 09 Oct 2016 21:29:06 +0800 https://ruby-china.org/topics/31272 https://ruby-china.org/topics/31272