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###### tags: `leetcode` `algorithm` `worldpress` | |
## 前言 | |
最近開始整理以前刷過的leetcode題目,不出所料很多都沒有什麼印象得從頭再來XD 整理的過程中我開始用HackMD將每一題作比較完整的紀錄,其中包含題目說明、初步想法、虛擬碼以及最終提交的作法。 是個勞力活,不過說實在解題真的蠻有意思的,今天在整理的時候意外接觸到Cyclic Sort這樣的排序方法,覺得實在太有意思了,在此作個紀錄。 之後我會將整理完畢的leetcode筆記放上來,希望到時候能對也有在刷題的朋友有些幫助:D | |
## 什麼是Cyclic Sort? 為什麼我要用它? | |
**Cyclic Sort 是一種coding pattern**,在解決給定陣列**僅含數字**且**在指定範圍內的**題目時相當的實用,比起一般的sort()排序有著更好的時間複雜度(O(n)),且由於是in-place,不需要額外的記憶體空間,在空間複雜度的表現也相當良好(O(1))。核心概念相當的單純,就是根據元素的數字將它放置在對應的位置上,我們往下看個簡單的例子吧! |
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<template> | |
<div class="scroll-image"> | |
<img :src="source" alt="a placeholder scroll image" /> | |
</div> | |
</template> | |
<script> | |
export default { | |
props: ['source'] | |
} |
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<template> | |
<div id="app"> | |
<h1>Infinite scrolling using scroll-view</h1> | |
<Scroll-view> | |
<template slot-scope="visible"> | |
<my-component v-for="i in items" :source="i.url" :key="i.id"></my-component> | |
</template> | |
</Scroll-view> | |
<h3 v-if="loading" class="loading">Loading...</h3> | |
</div> |
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<template> | |
<div id="app"> | |
<h1>Infinite scrolling using scroll-view</h1> | |
<Scroll-view> | |
<template slot-scope="visible"> | |
<my-component v-for="i in items" :source="i.url" :key="i.id"></my-component> | |
</template> | |
</Scroll-view> | |
<h3 v-if="loading" class="loading">Loading...</h3> | |
</div> |
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<script> | |
import todoAPI from './apis/todo_api.js' | |
export default { | |
name: 'App', | |
data() { | |
return { | |
fetchedData: null, | |
title: '' | |
} |
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import { apiHelper } from '../utils/api_helper.js' | |
export default { | |
todos: { | |
get() { | |
return apiHelper.get(`/todos/1`) | |
} | |
} | |
} |
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import axios from 'axios'; | |
// 告訴axios你創立的實體要以什麼作為baseURL,特別注意URL需要大寫,這是axios的屬性之一 | |
const baseURL = 'https://jsonplaceholder.typicode.com' | |
const axiosInstance = axios.create({ | |
baseURL | |
}) | |
// 輸出你所創立的axios實體 | |
export const apiHelper = axiosInstance |
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// App.vue | |
<template> | |
<div id="app"> | |
<button @click="fetch">Fetch data</button> | |
<h1>The title is {{title}}</h1> | |
</div> | |
</template> | |
<script> | |
import axios from 'axios' |
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<template> | |
<v-container class="fill-height" fluid> | |
<v-row align="center" justify="center"> | |
<v-col cols="12" sm="8" md="4"> | |
<v-card class="elevation-12"> | |
<v-toolbar color="primary" dark flat> | |
<v-toolbar-title class="center">Member Login</v-toolbar-title> | |
</v-toolbar> | |
<v-card-text> | |
<v-form> |
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<v-container class="fill-height" fluid> | |
<v-row align="center" justify="center"> | |
<v-col cols="12" sm="8" md="4"> | |
<v-card class="elevation-12"> | |
<v-toolbar color="primary" dark flat> | |
<v-toolbar-title class="center">Member Login</v-toolbar-title> | |
</v-toolbar> | |
<v-card-text> | |
<v-form> | |
<v-text-field |
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