Databases
StackOverflow2013
Postsdbo
PO
 

Note that there are some explanatory texts on larger screens.

plurals
  1. PO
    primarykey
    data
    text
    <p><strong>Edit</strong> There appears to be a better LZW solution that handles Unicode strings correctly at <a href="http://pieroxy.net/blog/pages/lz-string/index.html" rel="noreferrer">http://pieroxy.net/blog/pages/lz-string/index.html</a> (Thanks to pieroxy in the comments).</p> <hr> <p>I don't know of any gzip implementations, but the <a href="http://jsolait.net/" rel="noreferrer">jsolait library</a> (the site seems to have gone away) has functions for LZW compression/decompression. The code is covered under the <a href="http://www.gnu.org/licenses/lgpl.txt" rel="noreferrer">LGPL</a>.</p> <pre><code>// LZW-compress a string function lzw_encode(s) { var dict = {}; var data = (s + "").split(""); var out = []; var currChar; var phrase = data[0]; var code = 256; for (var i=1; i&lt;data.length; i++) { currChar=data[i]; if (dict[phrase + currChar] != null) { phrase += currChar; } else { out.push(phrase.length &gt; 1 ? dict[phrase] : phrase.charCodeAt(0)); dict[phrase + currChar] = code; code++; phrase=currChar; } } out.push(phrase.length &gt; 1 ? dict[phrase] : phrase.charCodeAt(0)); for (var i=0; i&lt;out.length; i++) { out[i] = String.fromCharCode(out[i]); } return out.join(""); } // Decompress an LZW-encoded string function lzw_decode(s) { var dict = {}; var data = (s + "").split(""); var currChar = data[0]; var oldPhrase = currChar; var out = [currChar]; var code = 256; var phrase; for (var i=1; i&lt;data.length; i++) { var currCode = data[i].charCodeAt(0); if (currCode &lt; 256) { phrase = data[i]; } else { phrase = dict[currCode] ? dict[currCode] : (oldPhrase + currChar); } out.push(phrase); currChar = phrase.charAt(0); dict[code] = oldPhrase + currChar; code++; oldPhrase = phrase; } return out.join(""); } </code></pre>
    singulars
    1. This table or related slice is empty.
    1. POJavaScript implementation of Gzip
      singulars
      1. PTQuestion
    1. PTAnswer
    1. USMatthew Crumley
    1. USMatthew Crumley
    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
    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. COHow can the code be LGPL if the algorithm is patented? Or are all patents truly expired?
      singulars
      1. PO
      1. USDavid Citron
    2. COAccording to Wikipedia, the patents expired a few years ago. It might be a good idea to check that out though.
      singulars
      1. PO
      1. USMatthew Crumley
    3. COLZW is way too old to still be patented. Last patents ran out in 2003 or so. There are loads of free implementations.
      singulars
      1. PO
      1. USypnos
 

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