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QUESTION
I'm trying to make a function that, for every occurrence of a vowel in a string, reverses said-string (and includes the vowel when it does this). The function is somewhat complex for my understanding so I'd like some help and a maybe a breakdown of it. However, I would only like to use the operators and statements that I'm currently learning (for/while and if). If possible, I would also like to avoid using list comprehension.
Here's what the inputs and outputs should look like:
an example input would be reverse_per_vowel('aerith')
which returns 'iraeth'
If we break the process of this function into steps, it should look like:
(a)erith → (a)erith (the first letter is a vowel, so it is reversed. However, because it is the first letter in the string, there are no visible changes.)
(ae)rith → (ea)rith (the second letter is also a vowel, so every letter in the string leading up to and including the vowel is reversed.)
(eari)th → (irae)th (the fourth letter is a vowel, so everything leading up to and including it is also reversed. Note how it accounts for the letters in the string that were reversed previously.)
as you can see, the amount of times the string is reversed is cumulative and I'm not quite sure how to code for this. However, I've attempted to write a component of the function.
What I'm trying
...ANSWER
Answered 2022-Apr-10 at 06:49One easy way to achieve this is to use recursion:
QUESTION
I am trying to use django-storages to access my "Hetzner" Storage Box (https://www.hetzner.com/storage/storage-box) using SFTP which should hold media data, i.e. image files which users of my website can upload dynamically.
The corresponding part of my settings.py
file looks like:
ANSWER
Answered 2021-Sep-06 at 09:00I feel you may have forgot to migrate your fields in django models ?
In django-storage
documentation on Github, you have those snippet of code.
From:
QUESTION
I have microk8s v1.22.2 running on Ubuntu 20.04.3 LTS.
Output from /etc/hosts
:
ANSWER
Answered 2021-Oct-10 at 18:29error: unable to recognize "ingress.yaml": no matches for kind "Ingress" in version "extensions/v1beta1"
QUESTION
Excerpted from the cppref:
Implementations in which
std::time_t
is a 32-bit signed integer (many historical implementations) fail in the year 2038.
However, the documentation doesn't say how to detect whether the current implementation is 2038-safe. So, my question is:
Is it guaranteed to be 2038-safe if sizeof(std::time_t) == sizeof(std::uint64_t)
in C++?
ANSWER
Answered 2022-Mar-25 at 17:04Practically speaking yes. In all modern implementations in major OSes time_t
is the number of seconds since POSIX epoch, so if time_t
is larger than int32_t
then it's immune to the y2038 problem
You can also check if __USE_TIME_BITS64
is defined in 32-bit Linux and if _USE_32BIT_TIME_T
is not defined in 32-bit Windows to know if it's 2038-safe
However regarding the C++ standard, things aren't as simple. time_t
in C++ is defined in which has the same content as
in C standard. And in C
time_t
isn't defined to have any format
3. The types declared are
size_t
(described in 7.19);
QUESTION
I'm making a Gatsby blog as a side project.
I want to use the "featureImage" optional field in mdx frontmatter.
I tried to refer to the https://www.gatsbyjs.com/docs/reference/graphql-data-layer/schema-customization#creating-type-definitions document according to the error message, but it was difficult to understand.
This is part of my code.
index.js
...ANSWER
Answered 2022-Mar-15 at 16:54You may find this GitHub thread insightful. Following it, try using:
QUESTION
I have a Json File which contains blog, when I am passing
...ANSWER
Answered 2022-Mar-10 at 17:44It appears you are using react-router-dom@6
so there are no longer any route props. In other words, props.match
is undefined. Reading into props.match.params
then throws the error.
Use the useParams
hook to access the date
route param.
QUESTION
(Solution has been found, please avoid reading on.)
I am creating a pixel art editor for Android, and as for all pixel art editors, a paint bucket (fill tool) is a must need.
To do this, I did some research on flood fill algorithms online.
I stumbled across the following video which explained how to implement an iterative flood fill algorithm in your code. The code used in the video was JavaScript, but I was easily able to convert the code from the video to Kotlin:
https://www.youtube.com/watch?v=5Bochyn8MMI&t=72s&ab_channel=crayoncode
Here is an excerpt of the JavaScript code from the video:
Converted code:
...ANSWER
Answered 2021-Dec-29 at 08:28I think the performance issue is because of expandToNeighbors
method generates 4 points all the time. It becomes crucial on the border, where you'd better generate 3 (or even 2 on corner) points, so extra point is current position again. So first border point doubles following points count, second one doubles it again (now it's x4) and so on.
If I'm right, you saw not the slow method work, but it was called too often.
QUESTION
ANSWER
Answered 2021-Dec-01 at 16:12See [intro.object]/8:
An object has nonzero size if ... Otherwise, if the object is a base class subobject of a standard-layout class type with no non-static data members, it has zero size. Otherwise, the circumstances under which the object has zero size are implementation-defined.
Empty base class optimization became mandatory for standard-layout classes in C++11 (see here for discussion). Empty member optimization is never mandatory. It is implementation-defined, as you suspected.
QUESTION
I ran sleep 1
under strace -tt
(which reports timestamps of all syscalls) in host and QEMU guest, and noticed that the time required to reach a certain syscall (clock_nanosleep
) is almost twice larger in case of the guest:
- 1.813 ms on the host vs
- 3.396 ms in the guest.
Here is full host strace -tt sleep 1 and here is full QEMU strace -tt sleep 1.
Below are excerpts where you can already see the difference:
Host:
...ANSWER
Answered 2021-Nov-06 at 22:11That's expected, considering the way strace
is implemented, i.e. via the ptrace(2)
system call: every time the traced process performs a system call or gets a signal, the process is forcefully stopped and the control is passed to the tracing process, which in the case of strace
does all the unpacking & printing synchronously, i.e. while keeping the traced process stopped. That's the kind of path which increases any emulation overhead exponentially.
It would be instructive to strace strace
itself -- you will see that does not let the traced process continue (with ptrace(PTRACE_SYSCALL, ...)
) until it has processed & written out everything related to the current system call.
Notice that in order to run a "trivial" sleep 1
command, the dynamic linker will perform a couple dozen system calls before even getting to the entry point of the sleep
binary.
I don't think that optimizing strace
is worth spending time on; if you were planning to run strace as an auditing instead of a debugging tool (by running production tasks under strace
or similar), you should reconsider your designs ;-)
QUESTION
I have a problem with my gitea version 1.15.5 running on my raspberry pi. I appears that the built in ssh server is not starting:
...ANSWER
Answered 2021-Oct-23 at 13:00After some more googling, I found the solution myself:
If there is an sshd server running, gitea does not automatically start its built-in ssh server. Instead, you have to force it by adding this line under [server]
in the app.ini
configuration:
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