Databases
StackOverflow2013
Postsdbo
PO
 

Note that there are some explanatory texts on larger screens.

plurals
  1. PO
    primarykey
    data
    text
    <p>You can use <a href="http://www.swi-prolog.org/pldoc/man?predicate=read_line_to_codes%2F2" rel="noreferrer"><code>read_line_to_codes/2</code></a> or <a href="http://www.swi-prolog.org/pldoc/man?predicate=read_line_to_codes%2F3" rel="noreferrer"><code>read_line_to_codes/3</code></a>. An example program which reads individual lines from <a href="http://en.wikipedia.org/wiki/Standard_streams#Standard_input_.28stdin.29" rel="noreferrer">stdin</a> and prints them to <a href="http://en.wikipedia.org/wiki/Standard_streams#Standard_output_.28stdout.29" rel="noreferrer">stdout</a> is the following:</p> <pre><code>read_lines([H|T]) :- read_line_to_codes(user_input, H), H \= end_of_file, read_lines(T). read_lines([]). write_lines([]). write_lines([H|T]) :- writef("%s\n", [H]), write_lines(T). main :- read_lines(X), write_lines(X). </code></pre> <p>(This uses <a href="http://www.swi-prolog.org/pldoc/man?predicate=writef%2F2" rel="noreferrer"><code>writef/2</code></a> for printing.) There are also <a href="http://www.swi-prolog.org/pldoc/doc_for?object=read_stream_to_codes%2f2" rel="noreferrer"><code>read_stream_to_codes/2</code></a> and <a href="http://www.swi-prolog.org/pldoc/doc_for?object=read_stream_to_codes%2f3" rel="noreferrer"><code>read_stream_to_codes/3</code></a>, which are not concerned with lines. The following code prints all input from stdin in one go to stdout:</p> <pre><code>main :- read_stream_to_codes(user_input, X), writef("%s", [X]). </code></pre> <p>Of course it's also possible to read from a file instead of stdin. For more, see the <a href="http://www.swi-prolog.org/pldoc/doc_for?object=section%282%2c%20%27A.20%27%2c%20swi%28%27%2fdoc%2fManual%2freadutil.html%27%29%29" rel="noreferrer"><code>readutil</code></a> library.</p>
    singulars
    1. This table or related slice is empty.
    1. POReading a string (from a file) in Prolog
      singulars
      1. PTQuestion
    1. PTAnswer
    1. USStephan202
    1. USStephan202
    plurals
    1. This table or related slice is empty.
    1. This table or related slice is empty.
    1. POReading a string (from a file) in Prolog
      singulars
      1. PTQuestion
    1. This table or related slice is empty.
    1. VO
      singulars
      1. PO
      1. This table or related slice is empty.
      1. VTUpMod
    2. VO
      singulars
      1. PO
      1. This table or related slice is empty.
      1. VTUpMod
    3. VO
      singulars
      1. PO
      1. This table or related slice is empty.
      1. VTUpMod
    1. COThanks :) This was exactly what I was looking for!
      singulars
      1. PO
      1. USdanr
 

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