sorting

问题 I have a json file like var data = { "list":[ { "g": "zas", "e": "wef" }, { "g": "abc", "e": "ew" }, { "g": "wee", "e": "asd" },..... How do I sort the entries w.r.t "g" so that I get abc then wee and then zas.... I want the sort changes permanently in the json file 回答1: In JavaScript, you can use a custom comparator function to sort an array like so: data.list.sort(function (a, b) { return a.g > b.g ? 1 : a.g < b.g ? -1 : 0 }); Array.sort @ MDC 来源： https://stackoverflow.com/questions/6238830

问题 I'm trying to create a sort function in c++ that sorts a linked list object using Heap sort but I'm not sure how to get started. Can anyone give me any idea on how to do it ? I'm not even sure how I would sort a Linked List 回答1: Heapsort works by building a heap out of the data. A heap is only efficient to build when you have random-access to each element. The first step is going to be creating an array of pointers to your list objects, so you can perform the usual heap sort on the array. The

问题 Say I have a table with data like this: +------------------------------+------------+---------+ | email | uname | credits | +------------------------------+------------+---------+ | 824@hotmail.com | barbra | 6 | | 123@gmail.com | smith | 25 | | 123@gmail.com | smithy | 30 | | abc@hotmail.com | another | 25 | | def@comcast.net | rob | 8 | | abc@hotmail.com | ben | 62 | | ijk@yahoo.com | jeb | 2 | | ijk@yahoo.com | joe | 5 | +------------------------------+------------+---------+ So there is

问题 Say I have a table with data like this: +------------------------------+------------+---------+ | email | uname | credits | +------------------------------+------------+---------+ | 824@hotmail.com | barbra | 6 | | 123@gmail.com | smith | 25 | | 123@gmail.com | smithy | 30 | | abc@hotmail.com | another | 25 | | def@comcast.net | rob | 8 | | abc@hotmail.com | ben | 62 | | ijk@yahoo.com | jeb | 2 | | ijk@yahoo.com | joe | 5 | +------------------------------+------------+---------+ So there is

问题 I am trying to use the standard command-line tool join to join two files. According to the documentation, both input files need to be sorted for this. Initially I just piped them through sort to achieve this, but this still resulted in errors like "join: file 2 is not in sorted order". I then looked into this a bit more closely and found that I was supposed to use sort -k 1b,1 , but that didn't seem to help either. I even played around with the locales (setting LANG=C or LANG=EN_en ) but

问题 I have the following problem which could (I am hoping) have a standard solution. I have a java application that interacts with the database and builds dynamically SQL strings. So far I guess usual stuff. Occusionally I need to have a sorting on the data and I use ORDER By . So far clear I guess. Problem: I sometimes need to sort on a column that does not have the actual data but a short string that is a key to the actual data. I mean: SELECT FROM MYTable WHERE MyTable.col1 = 'A' ORDER BY

问题 I have numbers that are getting converted to string. for example I have an amount 20000 and I have to show it as 200.00 so I am performing string Amount = $"{Convert.ToDouble(x.Amount) / 100:0.00}" and then I store them to list of amounts with values 200.00, 30.00, 588888.00, 56.36, I tried sorting it by orderby(x=>x.Anount) but this sorts on basis of string with first number as 200.00, 30.00, 56.36, 58888.00 I want the output to be sorted as 30.00, 56.36, 200.00, 588888.00 回答1: Pass a custom

问题 We are doing a project involving storing and comparing various cities. We have become stuck after adding a new city into the database, it goes to the bottom of the list - we want it to go into the database, sorted alphabetically. As only one value can be added at a time, all the other entries will already be alphabetical. Below is the relevant code to this. The problem area is the // Insertion Sort when adding // out bit. The error codes are: [BCC32 Error] File1.cpp(250): E2294 Structure

问题 i want to implement a selection sort method that takes an array of ints and sorts it in a descending order. however, the trick is to keep the original selection sort method unchanged but instead using simple arithmetic operations and without adding extra loops to swap the elements after the array finished sorting. this is my code and the idea is to store the position of the maximum value and the minimum value in local variables and swap them with the corresponding position after the inner

问题 What would be a nice algorithm to remove dupes on an array like below... var allwords = [ ['3-hidroxitiramina', '3-hidroxitiramina'], ['3-hidroxitiramina', '3-hidroxitiramina'], ['3-in-1 block', 'bloqueo 3 en 1'], ['abacterial', 'abacteriano'], ['abacteriano', 'abacteriano'], ['abciximab', 'abciximab'], ... Just to clarify, I would want one of the ['3-hidroxitiramina', '3-hidroxitiramina'], To be removed, so there is just one 回答1: [edit]: misread, after reading your clarification I'd suggest: