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一个十分好的例子去写 Binary Search

Leetcode 278. First Bad Version You are a product manager and currently leading a team to develop a new product. Unfortunately, the latest version of ... ...

Useful LeetCode Library

Convert an integer into an array of digits: var getDigitsArray = function(num){ if(num === 0) return [0]; var arr = []; while(num > 0){ var digit = nu ... ...

JavaScript里没有Associative Array

很多年来,我一直以为JavaScript里有Associative Array,而我也一直以为我每天在用的Associative Array,其实也只是Sugar Syntax. var arr; arr['a'] = 'apple'; arr['b'] = 'banana'; 其实它是一个Obje ... ...

Use JQuery to dynamically update day’s field when year/month changes

JQuery Code: //Adjust date picker days in month. $('select[name=birth_year],select[name=birth_month]').change(function(){ var year = $('select[name=bi ... ...

Update SQL Table using CASE and WHEN

Given a table salary, such as the one below, that has m=male and f=female values. Swap all f and m values (i.e., change all f values to m and vice ver ... ...

Optimize runtime of inserting 10000 items into mysql

un-optimized version: $wpdb; $t1 = microtime(TRUE); for($i = 0; $i < 10000; $i++){ $wpdb->query(" INSERT INTO test (value) VALUES ('xxx') "); } ... ...

Babel Issue (async/await): regeneratorRuntime is not defined

Babel 7 Users I had some trouble getting around this since most information was for prior babel versions. For Babel 7, install these two dependencies: ... ...

React SSR with Isomorphic-css-loader

Index.js: import App from './app'; import React from 'react'; import ReactDOM from 'react-dom'; import { renderToString } from "react-dom/server& ... ...