sorting

问题 I was given this sorting function in the best answer to a question I posted. It worked on the example data, but does not appear to work on my actual data and I am not sure why. My data can be see here: JSON It's an object of objects like this: "Montana": { "superiors": [ "Massachusetts", "Oklahoma", "New Mexico" ], "inferiors": [ "North Carolina" ] } It exists to instruct the sorting function. Here, Montana must be higher up in the list than North Carolina . But below Massachusetts , Oklahoma

问题 I have a lot of music and i want to rank them from least favorite to favorite (this will take many days). I would like to compare two music files at a time (2-way comparison). I saw some questions on algorithms with the fewest comparisons. But the catch is that (since it's a long process) i want to add new music to the collection and in that case i don't want to start over sorting everything (thus creating a lot more comparison steps). Which algorithm has the least amount of comparisons while

问题 I have a lot of music and i want to rank them from least favorite to favorite (this will take many days). I would like to compare two music files at a time (2-way comparison). I saw some questions on algorithms with the fewest comparisons. But the catch is that (since it's a long process) i want to add new music to the collection and in that case i don't want to start over sorting everything (thus creating a lot more comparison steps). Which algorithm has the least amount of comparisons while

问题 Using C#, I have a 2D Jagged array containing objects, what I want to achieve is to sort this Jagged array based on a public property within these objects I have created a sample below of my problem, I have limited experience with using LINQ, but I have attemped using it and have failed, I have also proceeded to create a swap method if needed. Any insight would be much welcomed, thank you //[][] of Objects private MyObject[][] jaggedArray = new MyObject[3][] { new MyObject[5] { new MyObject()

问题 I have a character string and need to find the word in the string that occurs most frequently. I've tried every variation of max , which.max , sort , order , and rank that I can think of - but can't seem to get the syntax worked out correctly. I've also tried all of the methods found here: Calculate frequency of occurrence in an array using R Example code: zzz <- c("jan", "feb", "jan", "mar", "mar", "jan", "feb") #random example data zzz <- paste(zzz, collapse=" ") #make data look like what I

问题 I have the following sample CSV. ,cid1,cid2,cid3 rid1,0.1,0.4,0.3 rid2,1.0,0.1,0.5 rid3,0.2,0.5,0.1 rid4,0.3,0.4,0.8 rid5,0.2,0.3,0.7 rid6,0.9,0.2,0.1 rid7,0.4,0.8,0.9 rid8,0.6,0.5,0.7 rid9,0.3,0.9,0.4 I want to show n rows with the highest value for every column in the file. Ideally, I would like to get the following output (for n = 3). cid1 rid2 1.0 cid1 rid6 0.9 cid1 rid8 0.6 # Blank lines separating columns are optional. cid2 rid9 0.9 cid2 rid7 0.8 cid2 rid8 0.5 cid3 rid7 0.9 cid3 rid4 0

问题 How do I parse this? The array is unnamed, the objects are unnamed? I also need to sort it and find overlaps between events IF you guys have any advice there too it will be a huge help for me. [{"title": "Evening Picnic", "start": "November 10, 2018 6:00 PM", "end": "November 10, 2018 7:00 PM"}, {"title": "Nap Break", "start": "November 8, 2018 12:56 PM", "end": "November 8, 2018 1:30 PM"}, {"title": "Football Game", "start": "November 3, 2018 6:14 PM", "end": "November 3, 2018 9:44 PM"}] I'm

问题 The challenge is next: At a job interview, you are challenged to write an algorithm to check if a given string, s, can be formed from two other strings, part1 and part2. The restriction is that the characters in part1 and part2 are in the same order as in s. The interviewer gives you the following example and tells you to figure out the rest from the given test cases. What am I doing wrong? Why it fails anyway? I wrote 2 different scripts, and both aren't working for some test cases function

问题 Justification first :) Switch: Switch the marbles in positions 0 and 1. Rotate: Move the marble in position 0 to position N - 1, and move all other marbles one space to the left (one index lower). If there is a list of number (1,3,0,2) switch - rotate - switch will sort the numbers 3,1,0,2 - 1,0,2,3 - 0,1,2,3 But if we have (3,1,0,2), it never ends with switch - rotate - switch - rotate ... method. Is there a better way to use both switch and rotate to efficiently get the sorted result? 回答1:

问题 Problem setup : Creating a function to take multiple CSV files selected by ID column and combine into 1 csv, then create an output of number of observations by ID. Expected : complete("specdata", 30:25) ##notice descending order of IDs requested ## id nobs ## 1 30 932 ## 2 29 711 ## 3 28 475 ## 4 27 338 ## 5 26 586 ## 6 25 463 I get: > complete("specdata", 30:25) id nobs 1 25 463 2 26 586 3 27 338 4 28 475 5 29 711 6 30 932 Which is "wrong" because it has been sorted by id. The CSV file I