dynamodb sort key

How to sort the key names of a multidimensional array Like what $families = array ( "Griffin" =>array ( "Peter" =>50 ), "Brown" =>array ( "Cleveland" =>30 ) ); In the sequence, the key names and corresponding key values are unchanged, as in the following form: $families = array ( "Brown" =>array ( "Cleveland" =>30 )，

Do not specify an order by in SQL, sort by the primary key? The answer is not necessarily. As an example: Query Attendanceemprank table, primary key is Attendanceemployeerankid, and is clustered index Execute the following statement and find that the first sentence does not specify an order by result is not the same as the second sentence. Looking at the e

Package com.demo.base;Import Java.util.Comparator;Import Java.util.TreeMap;public class Test { public static void Main (string[] args) { Do not specify a sequencertreemapTreemap1.put ("2", "1");Treemap1.put ("B", "1");Treemap1.put ("1", "1");Treemap1.put ("A", "1");System.out.println ("treemap1=" +treemap1);Specifying the Sequencertreemap/** int Compare (object O1, Object O2) returns the integral type of a primitive type,* Returns a negative number indicating: O1 is less than O2,* Returns

The actual application sometimes encounters the requirement of a two-dimensional array-specific ordering. Take a look at an example of the article! $arr =[ Array ( ' name ' = ' small Bad dragon ', ' age ' =>28 ), Array ( ' name ' = ' small bad Dragon 2 ', ' age ' = >14 ), Array ( ' name ' = ' small bad Dragon 3 ', ' age ' =>59 ), Array ( ' name ' = ' small bad Dragon 4 ', ' age ' =>23 , Array ( ' name ' =

Word_cloud = []CC = [{"C58": 341, "c59": 525, "C56:507," c57 ": 341," c54 ": 639," C55 ": 499," C23 ": 542," C63 ": 751," C64 ": 815," C17 ": 306," C16 " : "C19": 593, "C18": C11, "427": C10, "443": C13, "396": C12, "451": C15, "352": C14, "416": C32, "776": C33, "770": C30, "" : 354, C31:760, "c36": 542, "c37": 363, "C34": 806, "C35": 506, "c38": 379, "c39": 489, "C40": 559, "C41": 419, "c42": 441, "C43" : 419, "c44": 447, "C45": 499, "c46,": 527, "c47": 580, "c48": 663, "c49": 489, "C6": 353,

When making a react-based application, I encountered the need to sort the list by drag. When using sortable to add sort support to a list, one problem was found: The data was sorted correctly, but the order of the DOM was messed up, and after a while the reason was found because a dynamic key was specified when rendering the data (map (o,i) = ( from ' Lodash/uniq

PackageTest.tool.gui.common; ImportJava.util.Comparator; ImportJava.util.TreeMap; Public classTest { Public Static voidMain (string[] args) {//do not specify a sequencertreemapNewTreemap(); Treemap1.put ("2", "1"); Treemap1.put ("B", "1"); Treemap1.put ("1", "1"); Treemap1.put ("A", "1"); System.out.println ("Treemap1=" +treeMap1); //specifying the SequencertreemapNewTreemapNewComparator(){ /** int Compare (object O1, Object O2) returns an integer of the base type, * Returns a ne

Every day a JS small demo form sort. Key points of knowledge: form manipulation in the DOM, node manipulation

input consists several testcases.The first line has both integers n, m (n The following M lines, each contains three integers x, y, Z, means the Safe Distance between X and Y are Z, and y should r Un after X. The instructions is numbered from 0 to N-1.Outputprint one integer, the minimum time the CPU needs to run.Sample Input5 21 2 13 4 1Sample Output2Hintin the 1st NS, instruction 0, 1 and 3 is executed;in the 2nd NS, instruction 2 and 4 are executed. So the answer should is 2. Test Instructio

A summary of the methods for sorting data for key-value pairs.[CSharp]View Plaincopy /* Use a sort dictionary, which only supports ascending order by default Sorteddictionary DateTime dt = DateTime.Now; Dd. ADD (DT, "BBB"); Dd. ADD (dt. AddDays ( -1), "CCC"); Dd. ADD (dt. AddDays (1), "AAA"); You can use the list to get the descending key or value

Press nsdictionary key to sort it:The AllKeys of the Dict is assigned to an array and then sorted by the Sortedarrayusingcomparator: method, and then the value of the dictionary corresponding to the key is OK.int i = 0;Nsarray *keys = [dict AllKeys];Nsarray *sortedarray = [keys Sortedarrayusingcomparator:^nscomparisonresult (ID obj1, id obj2) {return [Obj1 compar

　　 var helper = {Sortfunction(data) {//{"20141216": {}, "20141217": {}} sorted by size, vararr1 = [],arr2=[],self = This; for(varKeyinchdata) {Arr1.push (key); } arr1.sort (); for(vari=0;i){ varDate =Arr1[i]; varo =Self._clone (data[date]); O.date=Arr1[i]; O.flag= O.hasownproperty (' img '); Arr2.push (o); } returnarr2; }}