lf | Fully Decentralized Fully Replicated Key/Value Store
kandi X-RAY | lf Summary
kandi X-RAY | lf Summary
LF (pronounced "aleph") is a fully decentralized fully replicated key/value store. Fully decentralized means anyone can run a node without obtaining special permission and all nodes are effectively equal. Fully replicated means every node stores the entire data set. LF is built on a directed acyclic graph (DAG) data model that makes synchronization easy and allows many different security and conflict resolution strategies to be used. One way to think of LF's DAG is as a gigantic conflict-free replicated data type (CRDT). Proof of work is used to rate limit writes to the shared data store on public networks and as one thing that can be taken into consideration for conflict resolution. Other things that can be considered (at the querying client's discretion) are local subjective heuristics at the node and certificates issued by a certificate authority. The name LF comes from the short story The Aleph by Jorge Luis Borges and the novel Mona Lisa Overdrive by William Gibson. Borges' story involves a point in space that contains all other points, a fitting metaphor for a data store where every node stores everything. Gibson's novel features a sci-fi take on Borges' concept. At one point a character calls it the "LF" because "aleph" has been mis-heard as an acronym. We used LF because there's already an open source project called Aleph, it gives the command line client lf a short name, and because two levels of nerdy literary recursion are cool.
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QUESTION
I have a function, mag, in a file mag.c that calculates the magnitude of an array.
...ANSWER
Answered 2022-Apr-08 at 03:51You are correct that a function argument will be implicitly converted to the expected type, if possible. However, this implicit conversion will not go so far as to convert the object or the array that the function argument is pointing to. It will only convert the function argument itself (i.e. the pointer).
Therefore, in C, you will have to create two separate functions, or do something ugly, like creating a single function which takes a void *
as an argument, which will be interpreted either as a long double *
or a double *
depending on the value of an additional argument:
QUESTION
ANSWER
Answered 2022-Apr-07 at 13:37You could use below code. Change column names as needed to include the line feeds
QUESTION
Here's my code. No matter what I enter for the weight and height, it always outputs 0.0000000. I'm not sure what is wrong with it.
...ANSWER
Answered 2022-Mar-23 at 02:42Make double bmi(w,h)
to double bmi(double w, double h)
. Without explicit declaration of argument type, it defaults to int
.
QUESTION
I'm trying to setup checkstyle in our project - but seems like Maven
(v3.8.3) or maven-checkstyle-plugin
(v3.1.1) itself are not aware of Java 14's record
(we use Java 17).
ANSWER
Answered 2022-Mar-16 at 16:42The plugin by default comes with Checkstyle version 8.29. Try explicitly defining the CheckStyle version (plus a small version bump to 3.1.2). For example, with version 9.2:
QUESTION
I'm attempting to scaffold the Identity pages for a new .NET 6.0 project (created from the ASP.NET Core MVC template). When I run the following command I get the error "path is empty" (I also included the build command output to show the project builds successfully).
...ANSWER
Answered 2022-Jan-20 at 15:49As mentioned by the comment on the question and on this site
https://github.com/dotnet/Scaffolding/issues/1713
Removing the nuget package Microsoft.AspNetCore.Identity
from all projects in the relevant solution solves the problem.
In many cases (also in mine) its enough to reference the nuget package Microsoft.AspNetCore.Identity.EntityFrameworkCore
QUESTION
Yes I know there are a number of questions (e.g. (0) or (1)) which seem to ask the same, but AFAICS none really answers what I want.
What I want is, to replace any occurrence of a newline (LF) with the string \n
, with no implicitly assumed newlines... and this with POSIX only utilities (and no GNU extensions or Bashisms) and input read from stdin with no buffering of that is desired.
So for example:
printf 'foo' | magic
should givefoo
printf 'foo\n' | magic
should givefoo\n
printf 'foo\n\n' | magic
should givefoo\n\n
The usually given answers, don't do this, e.g.:
- awk
printf 'foo' | awk 1 ORS='\\n
givesfoo\n
, whereas it should give justfoo
so adds an\n
when there was no newline. - sed
would work for justfoo
but in all other cases, like:
printf 'foo\n' | sed ':a;N;$!ba;s/\n/\\n/g'
givesfoo
, whereas it should givefoo\n
misses one final newline.
Since I do not want any sort of buffering, I cannot just look whether the input ended in an newline and then add the missing one manually.
And anyway... it would use GNU extensions.
sed -z 's/\n/\\n/g'
does work (even retains the NULs correctly), but again, GNU extension. - tr
can only replace with one character, whereas I need two.
The only working solution I'd have so far is with perl:
perl -p -e 's/\n/\\n/'
which works just as desired in all cases, but as I've said, I'd like to have a solution for environments where just the basic POSIX utilities are there (so no Perl or using any GNU extensions).
Thanks in advance.
...ANSWER
Answered 2022-Jan-12 at 06:42Here is a tr + sed
solution that should work on any POSIX shell as it doesn't call any gnu utility:
QUESTION
I'm having trouble understanding an error message I'm getting from my GEKKO model.
For context, this model is supposed to optimize the gas spring force and dimension parameters of a gas-spring assisted door to minimize the operator force required to close the door. My intent is to calculate the required force at a series of angles between 0 and 90 degrees, then sum the absolute value of the force at all angles and minimize that value. There is also a constraint on the gas spring length so the optimization doesn't come up with unrealistic dimension parameters. I've defined the force and other values that need to be computed at each angle as lists of Intermediate variables.
The error appears to be related to one of these lists of Intermediate variables, but I don't know how to interpret "Position: 2" in the error message, let alone "Error in syntax of function string". I've searched in some other answers on here, but I haven't found a clear answer on how to use this position information to troubleshoot the model. What is the message trying to tell me?
...ANSWER
Answered 2022-Jan-15 at 05:44One way to locate the error is to open the run directory and inspect the text model file gk_model0.apm
.
QUESTION
I was reading about the .gitattributes
file and the rule to force line endings in some tutorials it's written like * text=auto
and in some others, it's like * text=auto eol=lf
at the first line of the file.
Are there any differences? what does the first one exactly do? Does it even force any line endings?
Also in some repositories it's mentioned that * text=auto
preforms LF normalization! I don't know whether it's true or not.
ANSWER
Answered 2022-Jan-10 at 23:27There's a difference between these attributes. text
asks Git to perform line ending conversion. Any time Git does this, it will store LF endings in the repository, and it will convert them when it checks files out in the working tree. text=auto
asks Git to search the beginning of the file for a NUL byte, and if it finds one, then the file is binary and conversions are not performed; otherwise, the file is text, and conversions are performed. This usually works fine in most cases, and is a sensible default.
By default, Git honors several configuration variables to decide what line ending conversion should be used in the working tree (LF or CRLF), unless the eol
attribute is set. If eol
is set, then (a) the file is automatically set to be text
and (b) that line ending is always used.
So in the former case, * text=auto
says, "Guess whether this is a text file, and if it is, check this file out with the user's preferred line endings." The eol=lf
applies only to files that are guessed as text
in this case, as of Git 2.10. In general, eol
applies if text
is set explicitly, text=auto
is set and the file is detected as text, or if text
is left unspecified; in Git 2.10 and newer, it doesn't affect files explicitly marked -text
or detected as binary with text=auto
.
However, if you're using older versions of Git, this can cause some binary files to be mishandled, since it will force them to always be text. If your repository contains only text files, then it will work, but this is better written as * text eol=lf
. Otherwise, you can specify different types of files separately:
QUESTION
I'm trying to find ex without using math.h. My code gives wrong anwsers when x is bigger or lower than ~±20. I tried to change all double types to long double types, but it gave some trash on input.
My code is:
...ANSWER
Answered 2021-Dec-22 at 13:15When x
is negative, the sign of each term alternates. This means each successive sum switches widely in value rather than increasing more gradually when a positive power is used. This means that the loss in precision with successive terms has a large effect on the result.
To handle this, check the sign of x
at the start. If it is negative, switch the sign of x
to perform the calculation, then when you reach the end of the loop invert the result.
Also, you can reduce the number of iterations by using the following counterintuitive condtion:
QUESTION
I'm new to Windows scripting, but have quite a lot of experience in bash and python.
Here's the issue. Whenever I run this, (and this is the best result I've gotten so far) it makes it most of the way through and then errors with "The filename, directory name, or volume label syntax is incorrect."
Ignore the code designed for newlines, I'm still fighting with that as well.
...ANSWER
Answered 2021-Nov-10 at 02:41Changed
echo %LAST_TEN%
to
echo !LAST_TEN!
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