抱歉，回復(fù)晚了，平常不登簡(jiǎn)書。其實(shí)這是因?yàn)榭罩羔槷惓＃琣與b是一個(gè)數(shù)組，有可能是null，當(dāng)你查詢長(zhǎng)度，就會(huì)出現(xiàn)NullPointException
Are they the "same"?難題Given two arrays a and b write a function comp(a, b) (compSame(a, b) in Clojure) that...
安裝Kafka 打開(kāi)CMD 到C:\Develop\kafka_2.11-0.9.0.0這個(gè)路徑下，輸入 ——啟動(dòng)Kafka，可以創(chuàng)建主題來(lái)存儲(chǔ)消息 創(chuàng)建主題 打開(kāi)CMD 到...
安裝Zookeeper 進(jìn)入zookeeper設(shè)置目錄，C:\Develop\Zookeeper\conf 將"zoo_sample.cfg" 復(fù)制一份，重命名為"zoo.c...
安裝 以管理員方式打開(kāi)cmd 進(jìn)入安裝包的文件夾下，執(zhí)行msiexec.exe /q /i mongodb-win32-x86_64-2008plus-ssl-3.6.4-s...
下載 https://artifacts.elastic.co/downloads/elasticsearch/elasticsearch-6.2.4.zip 解壓縮，運(yùn)行 ...
解壓縮elastic-job-lite-console-${version}.tar.gz并執(zhí)行bin\start.bat。 打開(kāi)瀏覽器訪問(wèn)http://localhost:...
下載：https://www.consul.io/downloads.html 設(shè)置環(huán)境變量計(jì)算機(jī) 右鍵 屬性 高級(jí)屬性設(shè)置環(huán)境變量設(shè)置在path下加上：C:\Devel...
Once upon a time, on a way through the old wild west,… … a man was given directions to ...
Two tortoises named A and B must run a race. A starts with an average speed of 720 feet...
Write a function that accepts an array of 10 integers (between 0 and 9), that returns a...
This kata is to practice simple string output. Jamie is a programmer, and James' girlfr...
You have an array of numbers.Your task is to sort ascending odd numbers but even number...
The number 89 is the first integer with more than one digit that fulfills the property ...
Given two arrays of strings a1 and a2 return a sorted array r in lexicographical order ...
Find the missing letter Write a method that takes an array of consecutive (increasing) ...
Enough is enough! Alice and Bob were on a holiday. Both of them took many pictures of t...
難題Given two arrays a and b write a function comp(a, b) (compSame(a, b) in Clojure) that...
There is a queue for the self-checkout tills at the supermarket. Your task is write a f...
Write a function that takes an (unsigned) integer as input, and returns the number of b...
Count the number of Duplicates Write a function that will return the count of distinct ...
