SMISMEMBER(3valkey)

📦
version 9.0.6 · 2 versions
, in fedora 44

💖 SMISMEMBER — the valkey command manual, but make it bestie 💖

okay so welcome to the SMISMEMBER page of the valkey command manual, bestie 🎀 this is a 3valkey manual page and it's about to tell you, in the cutest way possible, whether a whole lil squad of members belongs to a set. no cap.

✨ NAME ✨

smismember — determines whether multiple members belong to a set. like, plural. multiple. a whole group chat of members. 💅

✨ SYNOPSIS ✨

SMISMEMBER key member [member...]

one key, then as many members as your heart desires. [member...] means keep going, girl, keep going 🌈

✨ DESCRIPTION ✨

Returns whether each member is a member of the set stored at key. that's it, that's the whole vibe check 🦋

For every member:

  • 1 gets returned if the value is a member of the set 💖
  • 0 gets returned if the element is not a member of the set, or if key does not exist at all 😭

so like, nonexistent key isn't an error here, it just means everybody gets a 0. she's chill about it.

✨ REPLY ✨

valkey-protocol(7) Array reply: a list representing the membership of the given elements, in the same order as they are requested.

ORDER. MATTERS. 🔥 if you asked about "one" then "notamember", you get the answer for "one" first. don't @ me.

✨ COMPLEXITY ✨

O(N) where N is the number of elements being checked for membership ⭐

✨ ACL CATEGORIES ✨

@fast @read @set

she's fast, she's read-only, she's a set girlie. iconic behavior honestly 👑

✨ HISTORY ✨

  • Available since: 6.2.0 🎂

✨ EXAMPLES ✨

watch her work, bestie:

127.0.0.1:6379> SADD myset "one"
(integer) 1
127.0.0.1:6379> SADD myset "one"
(integer) 0
127.0.0.1:6379> SMISMEMBER myset "one" "notamember"
1) (integer) 1
2) (integer) 0

see how the second SADD returned 0? that's because "one" was already in there. she said we been knew 💀 and then SMISMEMBER said 1 for "one" and 0 for "notamember" — in that exact order. ate. 💅

✨ SEE ALSO ✨

the whole set-friend group 🫶 go say hi.

okay that's the page!! this was version 9.0.0, dated 2025-10-21, and yes it is literally titled SMISMEMBER(3valkey) in the official valkey command manual 💜 thanks for reading, ily, go check your set membership, mwah 😭✨

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