StackOverflow2013

Note that there are some explanatory texts on larger screens.

plurals

PO
primarykey
Id
16071496
data
AcceptedAnswerId
0
AnswerCount
0
ClosedDate
CommentCount
6
CommunityOwnedDate
CreationDate
2013-04-17T22:41:03.520
FavoriteCount
0
LastActivityDate
2013-04-17T23:37:05.067
LastEditDate
2013-04-17T23:37:05.067
LastEditorUserId
971127
OwnerUserId
971127
ParentId
16069474
PostTypeId
2
Score
1
ViewCount
0
LastEditorDisplayName
text
Body
Table lookup <pre><code>#include <stdio.h> #define SIZE 16 #define SIDE 4 //sqrt(SIZE) int table[SIZE]; int rtable[100];// {x,y| x<=99, y<=99 } void setup(){ int i, x, y, xy, index;//xy = x + y x=y=xy=0; for(i=0;i<SIZE;++i){ table[i]= index= x*10 + y; rtable[x*10+y]=i; x = x + 1; y = y - 1;//right up if(y < 0 || x >= SIDE){ ++xy; x = 0; y = xy;; while(y>=SIDE){ ++x; --y; } } } } int getNGonalNeighbor(int index, int offsetX, int offsetY){ int x,y; x=table[index] / 10 + offsetX; y=table[index] % 10 + offsetY; if(x < 0 || x >= SIDE || y < 0 || y >= SIDE) return -1; //ERROR return rtable[ x*10+y ]; } int main() { int i; setup(); printf("%d\n", getNGonalNeighbor(15,-1,-1)); printf("%d\n", getNGonalNeighbor(15, 0,-1)); printf("%d\n", getNGonalNeighbor(15,-1, 0)); printf("%d\n", getNGonalNeighbor(11,-2,-1)); printf("%d\n", getNGonalNeighbor(0, -1,-1)); return 0; } </code></pre> don't use table version. <pre><code>#include <stdio.h> #define SIZE 16 #define SIDE 4 void num2xy(int index, int *offsetX, int *offsetY){ int i, x, y, xy;//xy = x + y x=y=xy=0; for(i=0;i<SIZE;++i){ if(i == index){ *offsetX = x; *offsetY = y; return; } x = x + 1; y = y - 1;//right up if(y < 0 || x >= SIDE){ ++xy; x = 0; y = xy;; while(y>=SIDE){ ++x; --y; } } } } int xy2num(int offsetX, int offsetY){ int i, x, y, xy, index;//xy = x + y x=y=xy=0; for(i=0;i<SIZE;++i){ if(offsetX == x && offsetY == y) return i; x = x + 1; y = y - 1;//right up if(y < 0 || x >= SIDE){ ++xy; x = 0; y = xy;; while(y>=SIDE){ ++x; --y; } } } return -1; } int getNGonalNeighbor(int index, int offsetX, int offsetY){ int x,y; num2xy(index, &x, &y); return xy2num(x + offsetX, y + offsetY); } int main() { printf("%d\n", getNGonalNeighbor(15,-1,-1)); printf("%d\n", getNGonalNeighbor(15, 0,-1)); printf("%d\n", getNGonalNeighbor(15,-1, 0)); printf("%d\n", getNGonalNeighbor(11,-2,-1)); printf("%d\n", getNGonalNeighbor(0, -1,-1)); return 0; } </code></pre>
Tags
Title
singulars
PostAcceptedAnswerId
1. This table or related slice is empty.
PostParentId
1. PONeighbor index computation for diagonally flattened matrix
 singulars
 PostTypePostTypeId
 PTQuestion
PostTypePostTypeId
1. PTAnswer
UserLastEditorUserId
1. USBLUEPIXY
UserOwnerUserId
1. USBLUEPIXY
plurals
PostLinksPostIdRelatedPostId
1. This table or related slice is empty.
PostLinksRelatedPostIdPostId
1. This table or related slice is empty.
PostsAcceptedAnswerId
1. This table or related slice is empty.
PostsParentIdCreationDate
1. This table or related slice is empty.
VotesPostIdCreationDate
1. VO
 singulars
 PostPostId
 PO
 UserUserId
 This table or related slice is empty.
 VoteTypeVoteTypeId
 VTUpMod
CommentsPostId

Querying!

Guidance

A row detail

Detail views are divided into sections. All the information in the data section comes from columns in the selected row. The other sections display data from other, related rows.

Related data can be related in a to-one or a to-many fashion. Captions of data related in a to-many fashion link to a list view showing a filtered view of the table.

Try moving around until you find a non-empty to-many entry and click on the label to get to one. You can move back to the root by clicking on the database name in the header.