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  19 <b>HsetnxCommand: Contents
</b><br>  <a href=
"#HSETNX _key_ _field_ _value_ (Redis >">HSETNX _key_ _field_ _value_ (Redis 
></a><br>    <a href=
"#Return value">Return value
</a> 
  22                 <h1 class=
"wikiname">HsetnxCommand
</h1> 
  30 <h1><a name=
"HSETNX _key_ _field_ _value_ (Redis >">HSETNX _key_ _field_ _value_ (Redis 
></a></h1> 1.3.10)=
 
  31 <i>Time complexity: O(
1)
</i><blockquote>Set the specified hash 
<i>field
</i> to the specified 
<i>value
</i>, if 
<i>field
</i> does not exist yet.
</blockquote> 
  32 <blockquote>If 
<i>key
</i> does not exist, a new key holding a hash is created.
</blockquote> 
  33 <blockquote>If the field already exists, this operation has no effect and returns 
0.Otherwise, the field is set to 
<i>value
</i> and the operation returns 
1.
</blockquote> 
  34 <h2><a name=
"Return value">Return value
</a></h2><a href=
"ReplyTypes.html">Integer reply
</a>