compare

My code is super slow (10+ min for each sheet) due to the quantity of data i have. I believe there may be a way to speed it up using arrays, but i am not sure how to go about it. I will try to explain the situation in detail. I have two worksheets with invoice#s, part#s and sale prices (among other info) that I am trying to compare to find differences. I've created a unique number for each line of data using a concatenation of the invoice# and the part# on both sheets. I've also sorted both sheets manually by that number. I'd like to find which of those unique#s are on sheet1 and not on sheet2

I am comparing two xml and I have to print the difference. How can I achieve this using LINQ. I know I can use XML diff patch by Microsoft but I prefer to use LINQ . If you have any other idea I will implement that //First Xml <Books> <book> <id="20504" image="C01" name="C# in Depth"> </book> <book> <id="20505" image="C02" name="ASP.NET"> </book> <book> <id="20506" image="C03" name="LINQ in Action "> </book> <book> <id="20507" image="C04" name="Architecting Applications"> </book> </Books> //Second Xml <Books> <book> <id="20504" image="C011" name="C# in Depth"> </book> <book> <id="20505" image=

I have two 3GB text files, each file has around 80 million lines. And they share 99.9% identical lines (file A has 60,000 unique lines, file B has 80,000 unique lines). How can I quickly find those unique lines in two files? Is there any ready-to-use command line tools for this? I'm using Python but I guess it's less possible to find a efficient Pythonic method to load the files and compare. Any suggestions are appreciated. If order matters, try the comm utility. If order doesn't matter, sort file1 file2 | uniq -u . I think this is the fastest method (whether it's in Python or another language

Given two floating-point numbers, I'm looking for an efficient way to check if they have the same sign, given that if any of the two values is zero (+0.0 or -0.0), they should be considered to have the same sign . For instance, SameSign(1.0, 2.0) should return true SameSign(-1.0, -2.0) should return true SameSign(-1.0, 2.0) should return false SameSign(0.0, 1.0) should return true SameSign(0.0, -1.0) should return true SameSign(-0.0, 1.0) should return true SameSign(-0.0, -1.0) should return true A naive but correct implementation of SameSign in C++ would be: bool SameSign(float a, float b) {

I have the following two arrays: $array_one = array('colorZero'=>'black', 'colorOne'=>'red', 'colorTwo'=>'green', 'colorThree'=>'blue', 'colorFour'=>'purple', 'colorFive'=>'golden'); $array_two = array('colorOne', 'colorTwo', 'colorThree'); I want an array from $array_one which only contains the key-value pairs whose keys are members of $array_two (either by making a new array or removing the rest of the elements from $array_one ) How can I do that? I looked into array_diff and array_intersect , but they compare values with values, and not the values of one array with the keys of the other. If

In Java, what's the most efficient way to return the common elements from two String Arrays? I can do it with a pair of for loops, but that doesn't seem to be very efficient. The best I could come up with was converting to a List and then applying retainAll , based on my review of a similar SO question : List<String> compareList = Arrays.asList(strArr1); List<String> baseList = Arrays.asList(strArr2); baseList.retainAll(compareList); EDITED: This is a one-liner: compareList.retainAll(new HashSet<String>(baseList)); The retainAll impl (in AbstractCollection) iterates over this , and uses

I've a simple question (I think): I'm trying to compare a NSNumber with a int, to see if it is 0 or 1. Here is the code: id i = [dictionary objectForKey:@"error"]; //class = NSCFNumber NSLog(@"%@ == 0 -> %@", i, i == 0); NSLog(@"%@ == 0 -> %@", i, [i compare:[NSNumber numberWithBool:NO]]); I tried this to methods but I get null as result: 2010-10-17 21:57:49.065 Api[15152:a0f] 0 == 0 -> (null) 2010-10-17 21:57:49.065 Api[15152:a0f] 0 == 0 -> (null) Can you help me? The result of comparison is a BOOL which is not an Objective-C object. Therefore you should not print it using %@ . Try %d instead

在日常学习和工作中，Excel表格是使用最频繁的办公软件之一，由于表格数据常常被编辑和修改，表格文件之间的差异问题时常困扰着我们，如果表格文件容量过大，就需要使用专业的比较工具来比较文件之间的不同之处。Beyond Compare就是一款相当好用的表格比较软件，可是当我们使用 Beyond Compare 比较表格数据时，出现乱码问题又该怎么办呢？ 问题描述：表格数据出现乱码 打开Beyond Compare软件，选择表格比较会话，打开会话操作界面。分别单击比较会话界面左右两侧“打开文件”按钮选择需要比较的表格文件。 如下图图例所示，表格数据没有正常显示在比较会话的左右两侧窗格中，出现了表格数据乱码的问题。 Beyond Compare表格比较数据乱码界面图例 解决方案：转换文件格式 Beyond Compare表格比较出现乱码问题，主要有两个原因：表格编码错误和文件格式不匹配，所以您只需要查看这两项正确与否即可轻松解决表格乱码的问题。 步骤一：单击菜单栏“会话”按钮，在展开的菜单中选择“会话设置”选项，打开“表格比较—会话设置”窗口，并切换到“格式”选项卡页面。 步骤二：展开“左边文件格式”栏目的下拉菜单，由于比较的表格数据是Excel表格文件，因此选择文件格式为：检测到（MS Excel工作薄）。 在“右边文件格式”栏目中，直接勾选“和左边文件格式一样”复选框即可。

I have an audit list full of serialized objects, and I'd like to compare them and return a list of the differences. By 'compare' I mean I want to return where the text for an element has changed, or where a node has been added (so its not in Xml1, but it is in Xml2- it won't happen the other way around) Sample xml: <HotelBookingView xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xmlns:xsd="http://www.w3.org/2001/XMLSchema"> <Id>119</Id> <RoomId>1</RoomId> <ChangeRequested>false</ChangeRequested> <CourseBookings> <CourseHotelLink> <Id>0</Id> </CourseHotelLink> </CourseBookings> <