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CAB230 Web Computing Assignment Getting Started with the API Version of 11 April 2019, 11:00PM. Note that the guide and the code have been substantially updated to reflect new filtering options and the switch to https. The final URL is: https://cab230.hackhouse.sh/. This document presents a short guide to help you get started with the API […]
Question 1 1 / 1 pts Find all distinct countries. Hint: use select(), distinct() Your Answer: a= df.select(‘Country’).distinct() a.show(50,False) Question 2 1 / 1 pts Find the Name and Price of sales records in Brazil. Hint: use filter(). Your Answer: b= df.filter(df[‘Country’] == ‘Brazil’) b.select(‘Name’, ‘Price’).show() Question 3 1 / 1 pts For each country, find the total Price. Hint: Use
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Question 1 5 / 5 pts Download the adjective-noun data sets here. Load it into spark and use divide-and-conquer to find the first (adj, noun) pair in which the noun is ‘unification’. Print the corresponding adjective. The skeleton code is provided below. One solution is to use filter() to find all pairs where the noun is ‘unification’, and
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Question 1 2 pts The following piece of code computes the frequencies of the words in a text file: from operator import add lines = sc.textFile(‘README.md’) counts = lines.flatMap(lambda x: x.split()) \ .map(lambda x: (x, 1)) \ .reduceByKey(add) Add one line to find the most frequent word. Output this word and its frequency. Hint: Use sortBy(), reduce(), or
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EE205 Project 1 Assign 2019-04-04 Due 2018-04-30 Rat in a Maze A Maze is given as M*N binary matrix of blocks and there is a rat initially at (0, 0) ie. maze[0][0] and the rat wants to eat food which is present at some given block in the maze (fx, fy). In a maze matrix,
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CAB230 Web Computing Assignment Client Side Specification Release Date: March 31 2019 Submission Date: May 31 2019 11:59PM The submission is due the Friday of Week 13 Weighting: 60% of Unit Assessment Task: Individual Project In this assignment, your overall task will be to develop a web application that makes crime statistics available to the
Adding a Search Bar In this worksheet, we will build on the work we have done with the earlier sheet on React and forms and update our Headline app to provide a basic search facility. The first thing to do is open up your existing app, in most cases from CodeSandbox. Currently, mine looks like
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Introduction to React React is a view creation library, built in JavaScript by the team at Facebook. If you have written websites using Express before, it is similar to Pug or EJS. React is designed to just handle the layout of your data – it does not have any strong opinions on how that data
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1.背景信息: 我们需要破解⼀一个4-6位的密码. 密码可以包含从32(空格)到的任何ASCII字符 126(〜),但由于密码是由⼈人选择的，因此它们不不是任意字符串串。 你可以使⽤用您对常⻅见⼈人类弱点的了了 解来识别特定⽤用户使⽤用的密码。您的⽬目标是编写代码以尽可能多地猜测这些代码。 我已经⽣生成了了30个密码，并且已经完成了了SHA256哈希值计算。 密码1到10都是四个字符,密码11-30 是六个字符。 我会给你⼀一个密码⽂文件. 这个⽂文件包含320个byte。 前32个字节是第⼀一个密码的 SHA256哈希值，第⼆二个32字节是第⼆二个密码hash……….注意:6位数密码的源⽂文件还没办法下载,我 稍后会给你 . 你要编写⼀一个C程序来猜测密码。 也就是说，这是四个或六个字符SHA256哈希是您下载的哈希之⼀一 的序列列。您应该创建⼀一个⽣生成名为`crack’的可执⾏行行⽂文件的Makefile. 基本逻辑:你的C程序 ⽐比如猜了了⼀一个密码AAAA,然后你就⽣生成AAAA对应的sha256哈希值,然后和我给 你的源⽂文件对应⽐比较,如果有找到相同的就算猜对了了 总共三种模式: 第⼀一种: 如果在没有参数的情况下运⾏行行crack，它应该猜测，并针对SHA256哈希测试它们。 当它输⼊入⼀一个 时，它应该打印⼀一⾏行行，包括明⽂文密码，空格和1-30的整数，表示它匹配的是哪个哈希。 例例如 这可能是您⽤用于查找密码的模式。 其他两种模式只是⽤用来评估。 第⼆二种: 如果使⽤用⼀一个整数参数运⾏行行crack，则该参数会对它应该产⽣生多少猜测。 在此模式下，密码猜测应打 印到stdout，由换⾏行行符(`\ n’)分隔。 第三种: 如果使⽤用两个参数运⾏行行crack，则应将第⼀一个视为密码列列表的⽂文件名(每⾏行行⼀一个)，第⼆二个视为 SHA256哈希密码列列表的⽂文件名(以32字节为⼀一组，没有换⾏行行符)。 然后它应该针对每个哈希测试 每个密码，并且结果输出就像第⼀一种那样产⽣生输出。它应该不不打印任何其他stdout。 如果要⽣生成其 他输出，请将其发送到stderr。 我会给你提供⼀一个SHA256的library. 写个⼩小程序，以便便更更改可⽤用的哈希值的数量量。 例例如，只读取整 个⽂文件，并计算它包含多少32字节块。 关于猜密码的建议: 为了了帮助您，我们提供了了⼤大约10,000个常⽤用密码的列列表. 注意:这些通常不不是四个字⺟母的密码。 获取候选四字⺟母密码列列表的最佳⽅方法是什什么?您还查看这个 ⽹网站https://www.thefreedictionary.com/4-letter-words.htm，下⾯面的漫画⾮非常有帮助。 为了了获取6位密码的源⽂文件:你需要先写⼀一个程序(!!!!重要!!!!!!): 执行基于与服务器的Die-Hellman密钥交换的质询响应协议。 回想一下，Die-Hellman密钥交换协议使双方能够在开放的通信渠道中产生共享秘密，这是 对手可以观察到的。 该过程从公共参数(g，p)开始。