The INCR command is commonly used in Redis to increment a value by one. And the INCRBY command can be used to increment a valued by a specified integer. But neither of those commands let us work with floating point numbers.
If we want to use floating point numbers, we can use the INCRBYFLOAT command.
Redis provides us with a convenient way to set multiple strings at once. Specifically, the MSET command enables us to set multiple strings in one go.
There’s also the MSETNX command which does the same thing, but only if none of the keys already exist.
The Redis CLI allows us to easily run a command multiple times. All we need to do is prefix the command with the number of times we want it to run.
Continue readingIn Redis, the GETRANGE command allows us to get part of a string at a given key, starting and ending at the specified offsets.
The GETRANGE command replaced the SUBSTR command, which basically does the same thing. The SUBSTR command is now considered deprecated (as of Redis 2.0.0).
In Redis, the SETRANGE command allows us to overwrite part of a string at a given key, starting at a specified offset. It overwrites the old value from the specified offset, for the entire length of the new value.
In Redis, the DECRBY command decrements the value of a key by the specified amount.
If the key doesn’t exist, DECRBY creates the key with a value of 0 and then decrements it by the specified amount.
An error occurs if the key contains a value of the wrong type or contains a string that cannot be represented as integer. DECRBY operations are limited to 64 bit signed integers.
In Redis, the DECR command decrements the value of a specified key by one.
If the key doesn’t exist, DECR creates the key with a value of 0 and then decrements it by one.
An error occurs if the key contains a value of the wrong type or contains a string that cannot be represented as integer.
Continue readingIn Redis, the INCRBYFLOAT command increments a floating point number by the specified amount. More specifically, it increments the string representing a floating point number stored at the specified key.
If the key doesn’t exist, INCRBYFLOAT creates the key with a value of 0 and then increments it by the specified amount.
An error occurs if the key contains a value of the wrong type, or if the current key content or the specified increment are not parsable as a double precision floating point number.
Continue readingIn Redis, the INCRBY command increments the value of a key by the specified amount.
If the key doesn’t exist, INCRBY creates the key with a value of 0 and then increments it by the specified amount.
An error occurs if the key contains a value of the wrong type or contains a string that cannot be represented as integer. INCRBY operations are limited to 64 bit signed integers.
In Redis, the INCR command increments the value of a specified key by one.
If the key doesn’t exist, INCR creates the key with a value of 0 and then increments it by one.
An error occurs if the key contains a value of the wrong type or contains a string that cannot be represented as integer.
Continue reading