抱歉，回復晚了，平常不登簡書。其實這是因為空指針異常，a與b是一個數組，有可能是null，當你查詢長度，就會出現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...
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【入門】安裝Kafka
安裝Kafka 打開CMD 到C:\Develop\kafka_2.11-0.9.0.0這個路徑下，輸入 ——啟動Kafka，可以創(chuàng)建主題來存儲消息 創(chuàng)建主題 打開CMD 到...
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【入門】安裝Zookeeper
安裝Zookeeper 進入zookeeper設置目錄，C:\Develop\Zookeeper\conf 將"zoo_sample.cfg" 復制一份，重命名為"zoo.c...
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【入門】安裝MongoDB
安裝 以管理員方式打開cmd 進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...
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【入門】安裝Elasticsearch
下載 https://artifacts.elastic.co/downloads/elasticsearch/elasticsearch-6.2.4.zip 解壓縮，運行 ...
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【入門】安裝Elastic-job-lite-console
解壓縮elastic-job-lite-console-${version}.tar.gz并執(zhí)行bin\start.bat。 打開瀏覽器訪問http://localhost:...
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【入門】安裝Consul
下載：https://www.consul.io/downloads.html 設置環(huán)境變量計算機 右鍵 屬性 高級屬性設置環(huán)境變量設置在path下加上：C:\Devel...
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Directions Reduction
Once upon a time, on a way through the old wild west,… … a man was given directions to ...
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Tortoise racing
Two tortoises named A and B must run a race. A starts with an average speed of 720 feet...
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Create Phone Number
Write a function that accepts an array of 10 integers (between 0 and 9), that returns a...
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Give me a Diamond
This kata is to practice simple string output. Jamie is a programmer, and James' girlfr...
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Sort the odd
You have an array of numbers.Your task is to sort ascending odd numbers but even number...
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Take a Number And Sum Its Digits Raised To The Consecutive Powers And ....?Eureka!!
The number 89 is the first integer with more than one digit that fulfills the property ...
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Which are in?
Given two arrays of strings a1 and a2 return a sorted array r in lexicographical order ...
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Find the missing letter
Find the missing letter Write a method that takes an array of consecutive (increasing) ...
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Delete occurrences of an element if it occurs more than n times
Enough is enough! Alice and Bob were on a holiday. Both of them took many pictures of t...
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Are they the "same"?
難題Given two arrays a and b write a function comp(a, b) (compSame(a, b) in Clojure) that...
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The Supermarket Queue
There is a queue for the self-checkout tills at the supermarket. Your task is write a f...
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Bit Counting
Write a function that takes an (unsigned) integer as input, and returns the number of b...
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Counting Duplicates
Count the number of Duplicates Write a function that will return the count of distinct ...