研发笔记
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  • DECR

    redis and string | Mar 1, 2016

    Decrements the number stored at key by one. If the key does not exist, it is set to 0 before performing the operation. An error is returned if the key contains a value of the wrong type or contains a string that can not be represented as integer. This operation is limited to 64 bit signed integers.

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  • BITPOS

    redis and string | Mar 1, 2016

    Return the position of the first bit set to 1 or 0 in a string.

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  • BITOP

    redis and string | Mar 1, 2016

    Perform a bitwise operation between multiple keys (containing string values) and store the result in the destination key.

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  • BITCOUNT

    redis and string | Mar 1, 2016

    Count the number of set bits (population counting) in a string.

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  • APPEND

    redis and string | Mar 1, 2016

    If key already exists and is a string, this command appends the value at the end of the string. If key does not exist it is created and set as an empty string, so APPEND will be similar to SET in this special case.

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