sorting

问题 I have a data frame which stores a count value for each model. Model name is an alphanumeric. Then I generate a bar plot using ggplot2 having the models in the x axis and the count in the y axis. I want to order my x axis. The x axis appears as follows in the data frame and in the x axis in the plot. I want to sort it properly for example, M_1, M_2, M_3, M_10, M_11, M_20 etc Model Count M_1 73 M_10 71 M_100 65 M_11 65 M_110 64 M_111 71 M_13 70 M_130 73 M_2 72 M_20 69 M_200 63 M_21 72 M_210 72

问题 I have a database as the following: And I would like to obtain a pandas dataframe filtered for the 2 rows per date, based on the top ones that have the highest population. The output should look like this: I know that pandas offers a formula called nlargest: https://pandas.pydata.org/pandas-docs/stable/reference/api/pandas.DataFrame.nlargest.html but I don't think it is usable for this use case. Is there any workaround? Thanks so much in advance! 回答1: I have mimicked your dataframe as below

问题 I have an object and I want to fill an array with the object property and repeat each property a number of times, based on its value. An example: obj = { watches: 3 rings: 1 } // => ['watches', 'watches', 'watches', 'rings'] Below is what I have so far. I'm having a hard time figuring how to repeat each property based on the associated value? function arrayBuilder(obj) { let objToArr = []; for (let [property, value] of Object.entries(obj)) { objToArr.push(property); } return objToArr; }

问题 I have an object and I want to fill an array with the object property and repeat each property a number of times, based on its value. An example: obj = { watches: 3 rings: 1 } // => ['watches', 'watches', 'watches', 'rings'] Below is what I have so far. I'm having a hard time figuring how to repeat each property based on the associated value? function arrayBuilder(obj) { let objToArr = []; for (let [property, value] of Object.entries(obj)) { objToArr.push(property); } return objToArr; }

问题 So I can successfully create a score board, and then dynamically update this scoreboard with the 3 variables. However, I now need to sort the scoreboard based on the score (so the variable score here) and put the top 10 scores on the TextArea. How do I do this using a Collection Sort? The method which writes the 3 variables into the Text File public void newScore() { try (BufferedWriter bw = new BufferedWriter(new FileWriter("xxxxx/gameScores.txt", true))) { int score = player.getPoints();

问题 Please help, I'm having trouble how to sort Array of Strings in two columns. So, I have two columns: Both of it contains a string. I need to sort the first column in alphabetical order while the second column should not shuffle, thus, it should correspond to the first column after sorting. Can anyone see where I need to put sorting method in my code below: public static void main(String[] args) { String[][] emp = { {"Victor ", "ZSA"}, {"Fred ", "HAN"}, {"Drake ", "SOL"}, {"Albert ", "TUR"}, {

问题 Please help, I'm having trouble how to sort Array of Strings in two columns. So, I have two columns: Both of it contains a string. I need to sort the first column in alphabetical order while the second column should not shuffle, thus, it should correspond to the first column after sorting. Can anyone see where I need to put sorting method in my code below: public static void main(String[] args) { String[][] emp = { {"Victor ", "ZSA"}, {"Fred ", "HAN"}, {"Drake ", "SOL"}, {"Albert ", "TUR"}, {

问题 Assume I have two Classes public class TestA{ TestB testB; String text; SecondTest secondTest; . . . } public class TestB{ int a; int b; } Now I have a List with TestB List<TestB> list1 If I want to sort the list I can do something like this: list1.sort(Comparator.comparing(TestB::getA) But what if I have a List with TestA List<TestA> list2 How I sort to a or b (TestB)? 回答1: That's an interesting question. I don't know of any Java "native" solution for this kind of deep comparison. But one

问题 I have a React component with a sorting headers table. This code works as planned: //definitions and imports... const [sort, setSort] = useState({column: 'rank', direction: 'ascending', isNumber: true}); const handleSort = (column, isNumber = false) => () => { let direction = (sort.column !== column) ? 'ascending' : (sort.direction === 'ascending' ? 'descending' : 'ascending'); setSort({column, direction, isNumber}); }; const getSortedData = (data) => { let sorted = R.sortBy( R.compose( sort

问题 I want to sort my column by date: var table = $('#table').DataTable({ "order": [[0, "desc"]], }); But here is my result: 29.06.17 27.06.17 26.06.17 22.08.17 18.10.17 15.09.17 What I would expect is this: 18.10.17 15.09.17 22.08.17 29.06.17 27.06.17 26.06.17 June, then August, then September and then October.... I tested also: "columnDefs": [ { "type": "date-dd.mm.yy", targets: 0 } ], But this didn't change anything. 回答1: dataTables date type uses Data.parse() which only supports a limited set