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Why SQL does not throw error when I try to sort based on same column twice?


Why SQL does not throw error when I try to sort based on same column twice?

By : Anonymous
Date : September 22 2020, 08:00 AM
I wish did fix the issue. Your question is "Why doesn't MySQL (or any other database) returns a warning or error when there are redundant ORDER BY keys?"
When writing a language or compiler, the designers have to make decisions on what to work on.
code :


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Sort a tab delimited file based on column sort command bash

Sort a tab delimited file based on column sort command bash


By : user152453
Date : March 29 2020, 07:55 AM
fixed the issue. Will look into that further I am trying to sort this file based on the fourth column. I want the file to reordered based on the values of the fourth column. , To sort on the fourth column use just the -k 4,4 selector.
code :
sort -t $'\t' -k 4,4 <filename>
sort -t $'\t' -k 4,4 -V <filename>
Javascript arguments.sort() throw error sort is not a function

Javascript arguments.sort() throw error sort is not a function


By : Richard
Date : March 29 2020, 07:55 AM
hop of those help? Because arguments has no sort method. Be aware that arguments is not an Array object, it's an array-like Arguments object.
However, you can use Array.prototype.slice to convert arguments to an array; and then you will be able to use Array.prototype.sort:
code :
function highest(){ 
  return [].slice.call(arguments).sort(function(a,b){ 
    return b - a; 
  }); 
}
highest(1, 1, 2, 3); // [3, 2, 1, 1]
Sort column of similar text alphabetically by part of text, not first different letter. Sort column based on another wit

Sort column of similar text alphabetically by part of text, not first different letter. Sort column based on another wit


By : genglun
Date : March 29 2020, 07:55 AM
wish helps you Create intermediary column next to your data to extract your sorting values and apply Auto Filter to the whole table. You can apply Auto Filter selecting your whole table (including headers) and pressing CTRL + SHIFT + L or selecting Filter option on the DATA Ribbon section. Then clicking the header in your inserted column you can select to sort and it will sort the whole table based on that column. Regards.
Sort a two dimensional String array with Arrays.sort based on a chosen column

Sort a two dimensional String array with Arrays.sort based on a chosen column


By : foram
Date : March 29 2020, 07:55 AM
help you fix your problem I have a two dimensional array filled with strings in Java. I want to be able to sort the entire array relative to the column I have chosen to sort by. , Sure, just pass the column index in as a parameter of the comparator.
code :
class ColumnComparator<T extends Comparable<T>> implements Comparator<T[]> {
  private final int column;

  ColumnComparator(int column) { this.column = column; }

  @Override public int compare(T[] a, T[] b) {
    return a[column].compareTo(b[column]);
  }
}
class ColumnComparator implements Comparator<String[]> {
  @Override public int compare(T[] a, T[] b) {
    return a[1].compareTo(b[1]);
  }
}
Sort multidimensional array based of the difference in the value, if value is same sort on first column

Sort multidimensional array based of the difference in the value, if value is same sort on first column


By : Julio Chichorro
Date : March 29 2020, 07:55 AM
will help you Sort multidimensional array based on the difference in the value, if the value is the same; sort on the first column. , OK, so here is a possible solution:
code :
package com.company;

import java.util.Arrays;
import java.util.Comparator;
import java.util.Scanner;

public class Main {

    public static void main(String[] args) {

        // creating Scanner and declaring and initializing our 2D array
        Scanner in = new Scanner(System.in);
        System.out.print("Enter number of rows for your 2D array: ");
        int rows = in.nextInt();
        int[][] arr = new int[rows][2];

        // asking user for values to assign to our array
        for (int i = 0; i < rows; i++) {
            for (int j = 0; j < 2; j++) {
                System.out.print("Enter value for row " + i + " column " + j + ": ");
                arr[i][j] = in.nextInt();
            }
        }

        // create a Comparator that compares by result of reduction of 2nd and first column in each array, then if the
        // results are equal (0), we compare by first column
        Comparator<int[]> cmp = Comparator.<int[]>comparingInt(x -> x[1] - x[0]).thenComparing(Comparator.comparingInt(x -> x[0]));

        // we make a stream out of the 2D array, we sort inner elements (single dimensional arrays) by the Comparator we created and we print out results
        Arrays.stream(arr)
              .sorted(cmp)
              .forEach(x -> System.out.println(Arrays.toString(x)));

    }

}
    [0] [1]

[0]  0   6

[1]  0   7

[2]  4   5

[3]  2   3

[4]  0   1
[0, 1]
[2, 3]
[4, 5]
[0, 6]
[0, 7]
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