2
0

HincrbyCommand.html 2.1 KB

123456789101112131415161718192021222324252627282930313233343536373839404142434445
  1. <!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01//EN">
  2. <html>
  3. <head>
  4. <link type="text/css" rel="stylesheet" href="style.css" />
  5. </head>
  6. <body>
  7. <div id="page">
  8. <div id='header'>
  9. <a href="index.html">
  10. <img style="border:none" alt="Redis Documentation" src="redis.png">
  11. </a>
  12. </div>
  13. <div id="pagecontent">
  14. <div class="index">
  15. <!-- This is a (PRE) block. Make sure it's left aligned or your toc title will be off. -->
  16. <b>HincrbyCommand: Contents</b><br>&nbsp;&nbsp;<a href="#HINCRBY _key_ _field_ _value_ (Redis &gt;">HINCRBY _key_ _field_ _value_ (Redis &gt;</a><br>&nbsp;&nbsp;&nbsp;&nbsp;<a href="#Examples">Examples</a><br>&nbsp;&nbsp;&nbsp;&nbsp;<a href="#Return value">Return value</a>
  17. </div>
  18. <h1 class="wikiname">HincrbyCommand</h1>
  19. <div class="summary">
  20. </div>
  21. <div class="narrow">
  22. <h1><a name="HINCRBY _key_ _field_ _value_ (Redis &gt;">HINCRBY _key_ _field_ _value_ (Redis &gt;</a></h1> 1.3.10)=
  23. <i>Time complexity: O(1)</i><blockquote>Increment the number stored at <i>field</i> in the hash at <i>key</i> by <i>value</i>. If <i>key</i> does not exist, a new key holding a hash is created. If <i>field</i> does not exist or holds a string, the value is set to 0 before applying the operation.</blockquote>
  24. <blockquote>The range of values supported by HINCRBY is limited to 64 bit signed integers.</blockquote><h2><a name="Examples">Examples</a></h2>
  25. Since the <i>value</i> argument is signed you can use this command to perform both increments and decrements:<br/><br/><pre class="codeblock python" name="code">
  26. HINCRBY key field 1 (increment by one)
  27. HINCRBY key field -1 (decrement by one, just like the DECR command)
  28. HINCRBY key field -10 (decrement by 10)
  29. </pre>
  30. <h2><a name="Return value">Return value</a></h2><a href="ReplyTypes.html">Integer reply</a> The new value at <i>field</i> after the increment operation.
  31. </div>
  32. </div>
  33. </div>
  34. </body>
  35. </html>