随笔档案「2021年1月」 - LilyLiya

摘要：refer to: https://www.algoexpert.io/questions/BST%20Traversal && leetcode &&力扣分别使用前序遍历中序遍历后序遍历的方法遍历搜索二叉树 1 import java.util.*; 2 3 class Program { 4 阅读全文

posted @ 2021-01-18 08:06 LilyLiya 阅读(219) 评论(0) 推荐(0)

JS_DOM_practice with Pokemon

摘要：display: inline-block, block; document.querySelector; document.createElement; .classList.add; .innerText /.src; label.innerText = `#${i}`; newImg.src = `${baseURL}${i}.png`; appendChild 阅读全文

posted @ 2021-01-18 02:44 LilyLiya 阅读(47) 评论(0) 推荐(0)

JS-DOM

摘要：querySelector, querySelectorAll; innerHTML, textContent/innerText/src; .style.width to change style; getAttribute/ setAttribute/ .classList/ .classList.add() / .classList.remove() /classList.contains() / classList.toggle(); traversing parent/child/sibling; Append& AppendChild(create DOM element and append it into page); remove/removeChild 阅读全文

posted @ 2021-01-18 02:34 LilyLiya 阅读(81) 评论(0) 推荐(0)

Newer js features

摘要：Default parameters, Spread(...), Rest(...), Arguments Object, Destructuring 阅读全文

posted @ 2021-01-13 10:14 LilyLiya 阅读(130) 评论(0) 推荐(0)

JS - callbacks & array methods

摘要：forEach, map,filter,reduce, arrow function, setTimeout && setInterval, some & every methods, arrow function vs this 阅读全文

posted @ 2021-01-12 07:07 LilyLiya 阅读(111) 评论(0) 推荐(0)

Max Subset Sum No adjacent

摘要：动态规划，非临界最大子集和阅读全文

posted @ 2021-01-11 14:22 LilyLiya 阅读(163) 评论(0) 推荐(0)

JS functions in detail

摘要：this; scope 阅读全文

posted @ 2021-01-11 13:25 LilyLiya 阅读(78) 评论(0) 推荐(0)

JS iterating over objects

摘要：return values, keys, entries of Object; day Of week 阅读全文

posted @ 2021-01-11 06:34 LilyLiya 阅读(81) 评论(0) 推荐(0)

loops; simple to do list

摘要：To do list; loops 阅读全文

posted @ 2021-01-11 03:52 LilyLiya 阅读(84) 评论(0) 推荐(0)

JS objects

摘要：JavaScript Object Literals 阅读全文

posted @ 2021-01-09 03:05 LilyLiya 阅读(74) 评论(0) 推荐(0)

深度优先搜索DFS

摘要：深度优先搜索阅读全文

posted @ 2021-01-08 14:50 LilyLiya 阅读(65) 评论(0) 推荐(0)

Array

摘要：mixed array; 数组基本操作： push, pop, shift, unshift, slice, splice 阅读全文

posted @ 2021-01-08 07:14 LilyLiya 阅读(95) 评论(0) 推荐(0)

JS_Boolean Logic

摘要：双等号VS三等号；如何判断一个字符串里面是否包含空格; 条件语句；控制台基本操作；阅读全文

posted @ 2021-01-08 03:08 LilyLiya 阅读(81) 评论(0) 推荐(0)

广度优先搜索 BFS

摘要：广度优先搜索，队列阅读全文

posted @ 2021-01-07 13:21 LilyLiya 阅读(77) 评论(0) 推荐(0)

Invert Binary Tree

摘要：翻转二叉树（BFS， DFS，队列）阅读全文

posted @ 2021-01-07 12:25 LilyLiya 阅读(86) 评论(0) 推荐(0)

Node Depths of BinaryTree

摘要：栈阅读全文

posted @ 2021-01-07 07:35 LilyLiya 阅读(161) 评论(0) 推荐(0)

js String

摘要：JS String的常见用法阅读全文

posted @ 2021-01-07 07:19 LilyLiya 阅读(123) 评论(0) 推荐(0)

js basics

摘要：js basics day 1 阅读全文

posted @ 2021-01-07 02:06 LilyLiya 阅读(93) 评论(0) 推荐(0)

nav bar

摘要：导航栏显示阅读全文

posted @ 2021-01-06 16:12 LilyLiya 阅读(372) 评论(0) 推荐(0)

Validate BST

摘要：refer to : https://www.algoexpert.io/questions/Validate%20BST 1. Problem statement. Given the root of a binary tree, determine if it is a valid binary 阅读全文

posted @ 2021-01-06 16:03 LilyLiya 阅读(94) 评论(0) 推荐(0)

Bootstrap basics

摘要：bootstrap framework basics 阅读全文

posted @ 2021-01-05 13:53 LilyLiya 阅读(106) 评论(0) 推荐(0)

BST construction

摘要：BST construction refer to : https://www.algoexpert.io/questions/BST%20Construction 1. 什么是二叉搜索树? 二叉搜索树是二叉树的一种特殊形式，而二叉树的特性在于每个节点包含最多两个子节点。二叉搜索树的特性：每个节点阅读全文

posted @ 2021-01-05 03:30 LilyLiya 阅读(123) 评论(0) 推荐(0)

Find closest value in BST

摘要：refer to : https://www.algoexpert.io/questions/Find%20Closest%20Value%20In%20BST Find Closest Value in BST 1. problem statement. 给定一个二叉搜索树和一个目标值，返回这个B 阅读全文

posted @ 2021-01-04 02:49 LilyLiya 阅读(124) 评论(0) 推荐(0)

three number sum

摘要：refer to: https://www.algoexpert.io/questions/Three%20Number%20Sum Three number Sum problem statement 给定一个数组和一个目标值，返回二维数组包含所有的三元组使得这三个数值的和等于目标值，返回的二维数阅读全文

posted @ 2021-01-03 08:12 LilyLiya 阅读(195) 评论(0) 推荐(0)

two number sum

摘要：Refer to : https://www.algoexpert.io/questions/Two%20Number%20Sum Two number sum 1. problem statement. 给定一个不含重复数字的数组和一个目标值，返回一个长度为2的数组，这个数组包含的两个数的和要等于阅读全文

posted @ 2021-01-03 06:09 LilyLiya 阅读(101) 评论(0) 推荐(0)

First duplicate value

摘要：From : https://www.algoexpert.io/questions/First%20Duplicate%20Value First duplicate value 1. problem statement 给定一个长度为n的数组，这个数组包含的整数的范围在[1,n]，我们需要找到第阅读全文

posted @ 2021-01-03 05:43 LilyLiya 阅读(100) 评论(0) 推荐(0)

Closest sum_pair

摘要：From Youtuber: CS Dojo Closest sum_pair 1. Problem Statement given two arrays and a target value, we need to find the pair value that their sum is mos 阅读全文

posted @ 2021-01-03 01:36 LilyLiya 阅读(149) 评论(0) 推荐(0)

滑动窗口 sliding window

摘要：From : https://www.educative.io/courses/grokking-the-coding-interview Maximum Sum Subarray of Size K (easy) 1. problem statement Given an array of pos 阅读全文

posted @ 2021-01-02 14:28 LilyLiya 阅读(183) 评论(0) 推荐(0)

SQL学习笔记-day1

摘要：What is SQL？ SQL stands for Structured Query Language. A sequel is a set of commands. SQL is a set of commands that can be sent to the database, then 阅读全文

posted @ 2021-01-02 14:01 LilyLiya 阅读(91) 评论(0) 推荐(0)