Helion | Stream LED color data of captured screen
kandi X-RAY | Helion Summary
kandi X-RAY | Helion Summary
Ambilight clone for windows written in Rust, meant to be used with an Arduino running LEDstream.
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QUESTION
I want to get string by cin>>
and then I'd like to print it by printf
. But printf
is giving some unexpected result. How can I fix it?
ANSWER
Answered 2021-Feb-19 at 11:00string
is not an array, it is a class. Do not use it like a pointer. To get a C-style string, use c_str()
:
QUESTION
I want to create hashes with books info in redis, for instance:
HMSET books key "83-7197-669-0" title "Access. DB desing" price 79.0 publisher "Helion" year 2002
HMSET books key "83-7197-786-7" title "Access XP" price 65.0 publisher "Helion" year 2003
Then I just want to find a book with a key 83-7197-669-0
, I tried:
1) HGET books key "83-7197-669-0"
(error) ERR wrong number of arguments for 'hget' command
2) HGETALL books
1) "key"
2) "83-7197-786-7"
3) "title"
4) "Access XP"
5) "price"
6) "65.0"
7) "publisher"
8) "Helion"
9) "year"
10) "2003"
I dont know why, but I see here only the second book ..
Next, I wanted to find a book with a given price, with no success. I dont even know what to try. Any ideas?
...ANSWER
Answered 2020-Apr-11 at 17:42HSET in redis is like a MAP of MAP, where the books in your example is the key of outer map, where as the key, title, price
, and other fields are like keys of inner map.
To get book by key, you can set key
as HSET name which and use HGET key
to get the book by key.
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Rust is installed and managed by the rustup tool. Rust has a 6-week rapid release process and supports a great number of platforms, so there are many builds of Rust available at any time. Please refer rust-lang.org for more information.
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