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How can memoization be applied to this algorithm?

由 て烟熏妆下的殇ゞ 提交于 2019-12-08 13:18:58
问题 After finding the difflib.SequenceMatcher class in Python's standard library to be unsuitable for my needs, a generic "diff"-ing module was written to solve a problem space. After having several months to think more about what it is doing, the recursive algorithm appears to be searching more than in needs to by re-searching the same areas in a sequence that a separate "search thread" may have also examined. The purpose of the diff module is to compute the difference and similarities between a

compare files within MATLAB [duplicate]

由 谁说胖子不能爱 提交于 2019-12-08 12:41:11
问题 This question already has answers here : Closed 7 years ago . Possible Duplicate: Compare files with MATLAB I would like to compare 2 txt files using MATLAB and print the diff if files aren't equal I found visdiff which is graphical tool but I would like to know if there are some MATLAB function doing such comparison ? if there are diff between files print only + or - files thanks 回答1: In linux/unix, you can use bash diff , using system() in matlab. (related article) It goes like this:

Diff between 2 timestamp - PHP

由 走远了吗. 提交于 2019-12-08 11:35:29
问题 I am trying to calculate the difference between $timenow and $time. $time = 2016-09-15 20:10:35 $timenow = 2016-09-15 20:40:42 I converted them to dateTime. $time = new DateTime($time); $timenow = new DateTime($timenow); And then did the calculation: $interval = $timenow->diff($time); echo $interval; Error: Catchable fatal error: Object of class DateInterval could not be converted to string I looked at these difference between 2 timestamps in php and Wrong hour difference between 2 timestamps

Comparing Mac's and Unix manuals?

由 青春壹個敷衍的年華 提交于 2019-12-08 08:21:29
How can I list differences between Mac's and Unix manuals? For example, between the following commands uniq guniq I tried the following unsuccessfully diff (man uniq) (man guniq) Paul Tomblin That should be diff <(man uniq) <(man guniq) To answer saua's question from the comments: Bash turns <(...) into a named pipe, which the diff program sees as a file. So as far as diff knows, it's comparing two files. Try this: man uniq > uniq.man man guniq > guniq.man diff uniq.man guniq.man 来源： https://stackoverflow.com/questions/621789/comparing-macs-and-unix-manuals

How to get the difference between next and previous row in an R time series?

由 流过昼夜 提交于 2019-12-08 07:53:36
问题 I have a quite large time series comprising around 14k observations of 4 variables ( date , x , y , z ). How can I, (contrary to the function diff( df$vector, lag = 1) which computes the difference between the current value ( t ) and the previous one ( t-1 )), calculate for each value the difference between the next value ( t+1 ) and the previous value ( t-1 )? 回答1: So, to understand the request... Generate some data: set.seed(11) a = sample(1:10, 10) Data is given as: 3 1 5 9 7 8 6 4 2 10

Example for using diff ruby gem to find difference between two files

由 二次信任 提交于 2019-12-08 07:20:28
Can someone give me an example to find the difference between two text files in Ruby. I am not able to figure out how to use the diff ruby gem. Also it would be great to know how to apply the diff output on the original file and get the latest file. I tried looking at the documentation for patchr gem but there was nothing available. I suggest that you try diffy instead. 来源： https://stackoverflow.com/questions/4925127/example-for-using-diff-ruby-gem-to-find-difference-between-two-files

Using the Visual Studio diff editor efficiently

由 北城余情 提交于 2019-12-08 06:58:38
问题 I am using Visual Studio 2015 and have a project that is versioned locally using Git. When I double-click on a file in the Team Explorer window, a Diff editor opens. From other IDEs (Eclipse, IntelliJ), I am used to managing my changes in these diff editors, like copying a chunk from the left to the right or the other way round. There is no middle bar that indicates such possible actions and no other clue. So when I want to revert a chunk of code, I have to select it on the left side, copy it

XSLT - Compare two similarXML files

由 僤鯓⒐⒋嵵緔 提交于 2019-12-08 05:40:11
问题 I have two XML-files similar to this: 1. <data> <object ID="1"> <ID>1</ID> <name>abc</name> <weight>50</weight> </object> <object ID="2"> <ID>2</ID> <name>def</name> <weight>75</weight> </object> </data> 2. <data> <object ID="2"> <ID>2</ID> <name>def</name> <weight>75</weight> </object> <object ID="3"> <ID>3</ID> <name>ghi</name> <weight>100</weight> </object> </data> And now I want to compare them. Either with an additional element (something like both) or a new files (in_both_files.xml,

Example for using diff ruby gem to find difference between two files

由 一曲冷凌霜 提交于 2019-12-08 04:54:59
问题 Can someone give me an example to find the difference between two text files in Ruby. I am not able to figure out how to use the diff ruby gem. Also it would be great to know how to apply the diff output on the original file and get the latest file. I tried looking at the documentation for patchr gem but there was nothing available. 回答1: I suggest that you try diffy instead. 来源： https://stackoverflow.com/questions/4925127/example-for-using-diff-ruby-gem-to-find-difference-between-two-files

What differences are in the patches/files created by diff and git diff?

由 喜欢而已 提交于 2019-12-08 04:50:28
问题 I wonder what differences are in the format of the files/patches created by diff and git-diff . I know in diff there are 3 (the "normal", the "compact" -c one and the "unified" -u one). However there may be some differences and in some situations you cannot freely exchange git diff and diff . So: On what does it depend whether you can use git diff and diff for the same file? And what are the differences between the formats? If you cannot exchange the commands (see 1.) how can you convert the
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