Databases
StackOverflow2013
Postsdbo
PO
 

Note that there are some explanatory texts on larger screens.

plurals
  1. PO
    primarykey
    data
    text
    <p>There are multiple ways to do this by structuring the index in a clever way involving a power of 2 somewhere as expected but as always python has one of the cleanest representation albeit somewhat backward</p> <pre><code>def sierpinski(n): d = ["*"] for i in xrange(n): sp = " " * (2 ** i) d = [sp+x+sp for x in d] + [x+" "+x for x in d] return d print "\n".join(sierpinski(4)) </code></pre> <p>The trick is to realize it's not printing the * that makes up the triangle but all the spaces as well, change " " in the code to "c" and you will see the following. Idea is it starts with a basic pattern and keeps appending to its head and tail so you start with 2 elements, then 4, then 8, finally 16. and since python prints list with newline delimiters you naturally get the pattern you are looking for. </p> <pre><code>sp is c ['c*c', '*c*'] sp is cc ['ccc*ccc', 'cc*c*cc', 'c*ccc*c', '*c*c*c*'] sp is cccc ['ccccccc*ccccccc', 'cccccc*c*cccccc', 'ccccc*ccc*ccccc', 'cccc*c*c*c*cccc', 'ccc*ccccccc*ccc', 'cc*c*ccccc*c*cc', 'c*ccc*ccc*ccc*c', '*c*c*c*c*c*c*c*'] sp is cccccccc ['ccccccccccccccc*ccccccccccccccc', 'cccccccccccccc*c*cccccccccccccc', 'ccccccccccccc*ccc*ccccccccccccc', 'cccccccccccc*c*c*c*cccccccccccc', 'ccccccccccc*ccccccc*ccccccccccc', 'cccccccccc*c*ccccc*c*cccccccccc', 'ccccccccc*ccc*ccc*ccc*ccccccccc', 'cccccccc*c*c*c*c*c*c*c*cccccccc', 'ccccccc*ccccccccccccccc*ccccccc', 'cccccc*c*ccccccccccccc*c*cccccc', 'ccccc*ccc*ccccccccccc*ccc*ccccc', 'cccc*c*c*c*ccccccccc*c*c*c*cccc', 'ccc*ccccccc*ccccccc*ccccccc*ccc', 'cc*c*ccccc*c*ccccc*c*ccccc*c*cc', 'c*ccc*ccc*ccc*ccc*ccc*ccc*ccc*c', '*c*c*c*c*c*c*c*c*c*c*c*c*c*c*c*'] ccccccccccccccc*ccccccccccccccc cccccccccccccc*c*cccccccccccccc ccccccccccccc*ccc*ccccccccccccc cccccccccccc*c*c*c*cccccccccccc ccccccccccc*ccccccc*ccccccccccc cccccccccc*c*ccccc*c*cccccccccc ccccccccc*ccc*ccc*ccc*ccccccccc cccccccc*c*c*c*c*c*c*c*cccccccc ccccccc*ccccccccccccccc*ccccccc cccccc*c*ccccccccccccc*c*cccccc ccccc*ccc*ccccccccccc*ccc*ccccc cccc*c*c*c*ccccccccc*c*c*c*cccc ccc*ccccccc*ccccccc*ccccccc*ccc cc*c*ccccc*c*ccccc*c*ccccc*c*cc c*ccc*ccc*ccc*ccc*ccc*ccc*ccc*c *c*c*c*c*c*c*c*c*c*c*c*c*c*c*c* </code></pre>
    singulars
    1. This table or related slice is empty.
    1. POProgram to print Sierpinski triangle
      singulars
      1. PTQuestion
    1. PTAnswer
    1. This table or related slice is empty.
    1. UStweaking
    plurals
    1. This table or related slice is empty.
    1. This table or related slice is empty.
    1. This table or related slice is empty.
    1. This table or related slice is empty.
    1. VO
      singulars
      1. PO
      1. This table or related slice is empty.
      1. VTUpMod
    1. This table or related slice is empty.
 

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.

SQuiL has stopped working due to an internal error.

If you are curious you may find further information in the browser console, which is accessible through the devtools (F12).

Reload