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<!DOCTYPE html>
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<html lang="zh-Hans">
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<head>
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<meta charset="UTF-8">
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<meta name="viewport" content="width=device-width, initial-scale=1.0">
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<title>002. 字母异位词分组 – 图解</title>
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<link rel="stylesheet" href="../shared/style.css">
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<style>
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/* page-specific overrides */
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.vis-area { min-height: 120px; padding: 16px 0; }
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.code-section { margin-top: 16px; }
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</style>
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</head>
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<body>
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<div class="container">
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<h1>🟡 002. 字母异位词分组 <span class="badge medium">中等</span></h1>
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<p class="subtitle">分类：哈希 ｜ LeetCode Hot 100</p>
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<!-- 控制面板 -->
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<div class="controls" id="controls">
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<label for="inputArea">输入：</label>
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<input type="text" id="inputArea" placeholder="默认示例，可自定义">
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<button id="applyBtn" class="primary">生成图解</button>
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<select id="exampleSelect"></select>
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<span style="flex:1"></span>
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<button id="prevBtn">◀ 上一步</button>
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<button id="nextBtn">下一步 ▶</button>
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<button id="jumpBtn">⏭ 跳到结果</button>
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<button id="autoBtn">自动播放</button>
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<button id="resetBtn">重置</button>
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</div>
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<!-- 步骤流水线 -->
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<div class="pipeline" id="pipeline"></div>
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<!-- 提示条 -->
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<div class="hint info" id="hintBox">
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<span id="stepInfo"></span><br>
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<span id="hintText"></span>
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</div>
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<!-- 可视化面板 -->
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<div class="panels">
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<div class="panel" id="mainPanel">
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<h3>📊 可视化</h3>
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<div class="vis-area" id="vizArea">点击「生成图解」开始</div>
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</div>
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<div class="panel-grid">
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<div class="panel" id="detailPanel">
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<h3>📝 当前步骤详情</h3>
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<div id="detailContent">等待开始...</div>
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</div>
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<div class="panel" id="resultPanel">
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<h3>✅ 结果</h3>
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<div id="resultContent">等待完成...</div>
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</div>
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</div>
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</div>
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<!-- 代码 -->
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<div class="panel code-section">
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<h3>💻 参考代码（Python）</h3>
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<div id="codeArea"></div>
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</div>
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<footer>Powered by QwenPaw · 图解算法 · LeetCode Hot 100</footer>
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</div>
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<script src="../shared/algo-viz.js"></script>
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<script>
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"use strict";
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(function() {
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// ========== Algorithm Logic ==========
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const examples = [
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{input: ["eat","tea","tan","ate","nat","bat"], label: '示例1'},
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{input: [""], label: '示例2: [""]'},
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{input: ["a"], label: '示例3: ["a"]'},
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];
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let strs, steps, stepCtrl;
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function sortedKey(s) { return s.split('').sort().join(''); }
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function buildSteps(arr) {
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strs = arr; steps = [];
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const groups = {};
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steps.push({stage:'start', msg:'遍历每个字符串，将其按字母排序后的结果作为 key 分组', current:'', key:'', groups:{}});
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for (let i = 0; i < arr.length; i++) {
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const s = arr[i];
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const key = sortedKey(s);
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steps.push({stage:'sort', msg:`处理 "${s}"：排序后 key = "${key}"`, current:s, key, groups:JSON.parse(JSON.stringify(groups)), idx:i});
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if (!groups[key]) groups[key] = [];
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groups[key].push(s);
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steps.push({stage:'group', msg:`将 "${s}" 加入分组 ["${key}"]`, current:s, key, groups:JSON.parse(JSON.stringify(groups)), idx:i});
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}
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steps.push({stage:'done', msg:'分组完成', current:'', key:'', groups:JSON.parse(JSON.stringify(groups))});
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}
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function render(step) {
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const s = steps[step];
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// viz
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let viz = '<div class="nums-line">';
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strs.forEach((st,i) => {
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const cls = s.idx===i ? (s.stage==='group'?'green':'orange') : 'default';
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viz += `<span class="chip ${cls}" style="min-width:auto;padding:4px 12px;">"${st}"</span>`;
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});
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viz += '</div>';
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if (s.current) viz += `<div style="margin-top:8px;">当前: <code>"${s.current}"</code> → key: <code>"${s.key}"</code></div>`;
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$('vizArea').innerHTML = viz;
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let detail = '<div class="calc-block">' + s.msg + '</div>';
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detail += '<div style="margin-top:8px;"><b>分组结果：</b></div>';
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Object.entries(s.groups).forEach(([k,v]) => {
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detail += `<div style="margin:4px 0;"><code>${k}</code> → [${v.map(x=>`"${x}"`).join(', ')}]</div>`;
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});
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$('detailContent').innerHTML = detail;
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if (s.stage === 'done') {
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const result = Object.values(s.groups);
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$('resultContent').innerHTML = `<div class="final-answer">返回 <b>${JSON.stringify(result)}</b><br>共 ${result.length} 个分组</div>`;
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}
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$('hintText').textContent = s.msg;
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const stages = ['start→开始','sort→排序','group→分组','done→完成'];
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$('pipeline').innerHTML = stages.map(st => {
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const [k,l] = st.split('→');
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return `<span class="pipe-step ${s.stage===k?'active':''}">${l}</span>`;
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}).join('<i>→</i>');
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}
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function init() {
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const sel = $('exampleSelect');
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examples.forEach((e,i) => { sel.innerHTML += `<option value="${i}">${e.label}</option>`; });
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$('inputArea').value = '["eat","tea","tan","ate","nat","bat"]';
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buildSteps(examples[0].input);
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stepCtrl = new StepController({onStep: render});
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stepCtrl.setSteps(steps.map((_,i)=>i));
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$('stepInfo').textContent = '步骤 1 / ' + steps.length;
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stepCtrl.onStep = (idx) => { render(idx); $('stepInfo').textContent = `步骤 ${idx+1} / ${steps.length}`; };
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$('applyBtn').onclick = () => {
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try {
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const arr = JSON.parse($('inputArea').value);
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buildSteps(arr);
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stepCtrl.setSteps(steps.map((_,i)=>i));
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render(0);
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} catch(e) { alert('请输入合法 JSON 数组，如 ["eat","tea"]'); }
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};
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$('exampleSelect').onchange = () => {
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const e = examples[parseInt($('exampleSelect').value)];
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$('inputArea').value = JSON.stringify(e.input);
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buildSteps(e.input);
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stepCtrl.setSteps(steps.map((_,i)=>i));
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render(0);
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};
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$('prevBtn').onclick = () => stepCtrl.prev();
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$('nextBtn').onclick = () => stepCtrl.next();
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$('jumpBtn').onclick = () => stepCtrl.jumpToEnd();
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$('autoBtn').onclick = () => { const on = stepCtrl.toggleAuto(); $('autoBtn').textContent = on ? '暂停' : '自动播放'; };
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$('resetBtn').onclick = () => { stepCtrl.reset(); $('autoBtn').textContent = '自动播放'; };
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}
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init();
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$('codeArea').innerHTML = renderCode(`def groupAnagrams(strs):
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groups = {}
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for s in strs:
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key = ''.join(sorted(s))
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if key not in groups:
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groups[key] = []
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groups[key].append(s)
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return list(groups.values())`, {lang:'Python'});
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})();
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</script>
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</body>
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</html>
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