Range Sum Query 2D - Immutable
https://leetcode.com/problems/range-sum-query-2d-immutable/条件说sumRegion会调很多次,如果每次都用双for循环去累加的话就有太多重复计算了,所以可以实现cache一下。可以有两种cache机制,一种是在初始化的时候就生成cache这...
Immutable 学习
1.什么是ImmutableData?ImmutableData就是一旦创建,就不能再被更改的数据。对Immutable对象的任何修改或添加删除操作都会返回一个新的Immutable对象。Immutable实现的原理是 PersistentDataStructure(持久化数据结构),也就是使用旧数...
Java [Leetcode 303]Range Sum Query - Immutable
题目描述:Givenanintegerarray nums,findthesumoftheelementsbetweenindices i and j (i ≤ j),inclusive.Example:Givennums=[-2,0,3,-5,2,-1]sumRange(0,2)->1sum...
[Guava官方文档翻译] 7. Guava的Immutable Collection(不可变集合)工具 (Immutable Collections Explained)
我的技术博客经常被流氓网站恶意爬取转载。请移步原文:http://www.cnblogs.com/hamhog/p/3538666.html,享受整齐的排版、有效的链接、正确的代码缩进、更好的阅读体验。例子publicstaticfinalImmutableSet<String>COLO...
[Immutable + AngularJS] Use Immutable .List() for Angular array
conststores=Immutable.List([{name:'Store42',position:{latitude:61.45,longitude:23.11,},address:'whatever'},{name:'Store2',position:{latitude:61.48,lon...
combineReducers 对数据进行拆分管以及使用immutable.js
1使用combineReaducers整合reducersimport{combineReducers}from'redux-immutable';import{reducerasheaderReducer}from'../common/header/store';import{reducerash...
[Immutable.js] Using fromJS() to Convert Plain JavaScript Objects into Immutable Data
Immutable.jsoffersthefromJS()methodtobuildimmutablestructuresfromobjectsandarray.Objectsareconvertedintomaps.Arraysareconvertedintolists.ThefromJS()me...
JAVA不可变类(immutable)机制与String的不可变性(推荐)
这篇文章主要介绍了JAVA不可变类(immutable)机制与String的不可变性(推荐)的相关资料,非常不错,具有参考借鉴价值,需要的朋友可以参考下
react脚手架改造(react/react-router/redux/eslint/karam/immutable/es6/webpack/Redux DevTools)
公司突然组织需要重新搭建一个基于node的论坛系统,前端采用react,上网找了一些脚手架,或多或少不能满足自己的需求,最终在基于YeoMan的react脚手架generator-react-webpack上搭建改造,这里作为记录。代码在这里:github另外推荐地址:react-starter-k...
不可变集合 Immutable Collections
例子public static final ImmutableSet<String> COLOR_NAMES = ImmutableSet.of("red","orange","yellow","green","blue","purple");class Foo {Set<Bar&...
303. Range Sum Query - Immutable(动态规划)
Givenanintegerarray nums,findthesumoftheelementsbetweenindices i and j (i ≤ j),inclusive.Example:Givennums=[-2,0,3,-5,2,-1]sumRange(0,2)->1sumRange...