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redis GETBIT command

Chinese translationRecent Updates：2018-05-16 09:55:59

get

英[get] 美[ɡɛt]

vt. Get; catch; persuade; receive (punishment, etc.)

vt.& vi. Arrive, come

vi. Become; start; try to deal with; obtain benefits or wealth

n. Reproduce, cub; profit

Third person singular : gets present participle: getting past tense: got past participle: got gotten

bit

##英[bɪt] 美[bɪt]

n. A little, a piece; a small amount, a little; a while, a blink of an eye; [count] bit (binary information unit)

adj. very small, insignificant

adv. [colloquial] quite , a little, more or less, how much [a bit to is omitted]

vt. To put a bit on (the horse); to put on the bit; to restrain; to restrict

v. bite, bite ( past tense of bite); stinging; biting bait; habit of biting (or stinging)

Third person singular: bits Plural: bits Present participle: bitting Past tense: bitted Past participle: bitted

redis GETBIT command Video explanation

redis GETBIT command syntax

Function: Get the bit at the specified offset for the string value stored in key. When offset is greater than the length of the string value, or key does not exist, 0 is returned.

Syntax: GETBIT key offset

Available versions:>= 2.2.0

Time complexity : O(1)

Return: The bit at the specified offset of the string value.

redis GETBIT command example

# 对不存在的 key 或者不存在的 offset 进行 GETBIT， 返回 0
redis> EXISTS bit
(integer) 0
redis> GETBIT bit 10086
(integer) 0
# 对已存在的 offset 进行 GETBIT
redis> SETBIT bit 10086 1
(integer) 0
redis> GETBIT bit 10086
(integer) 1

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