هياكل البيانات واستخداماتها

في هذا الدرس

pick the right structure for each problem.

الموضوعات المخطط لها

• String: a value or counter; SET, GET, INCR, SET key v EX 60. Use for cached JSON and counters.
• Hash: field-value map under one key; HSET, HGET. Use for objects you update field by field.
• Set: unique members; SADD, SISMEMBER. Use for tags, "who liked this".
• Sorted set: members with a score, ordered; ZADD, ZRANGE, ZINCRBY. Use for leaderboards and time-ordered indexes.
• Expiration applies to the whole key, not to a hash field or set member.