chapter | A self-hosted event management tool for nonprofits
kandi X-RAY | chapter Summary
kandi X-RAY | chapter Summary
After several years of being dissatisfied with existing group event tools (Meetup, Facebook events) we decided to build our own. This will be a self-hosted Docker container deployed to the cloud with a one-click and then configured by the owner. No coding required. Your organization can host an instance of Chapter under a sub-domain of your website, such as chapter.sierraclub.org or chapter.womenwhocode.org. All of an organization's user data will remain under their control. Our Vision statement provides more details on the reasons for Chapter.
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Copyfunction selectChapter(number, context) {
per.textContent = ""
let chapter = getChapter(number)
if (chapter.exercises.length) {
per.appendChild(opt("box", "Select an exercise"))
chapter.exercises.forEach(exercise => {
function getChapter(number) {
for (let i = 0; i < chapterData.length; i++)
if (chapterData[i].number == number)
return chapterData[i]
} @DELETE
@Path("{id}")
public SimpleResponse delete(@PathParam("id") int id) {
return LinkRest.delete(Department.class, config).id(id).delete();
} Community Discussions
Trending Discussions on chapter
QUESTION
I have a large text from which heading strings have been extracted using regex. The headings start with from 1-6 hashtags (#). Here is an example of the input array:
...ANSWER
Answered 2022-Apr-03 at 07:34With a reduce based approach one can keep tracing/managing the correct (nested) chapters arrays where one needs to push a new chapter item into.
Thus the accumulator can be an object which in addition to the result array features an index/map for the to be traced nested level chapters arrays.
The to be reduced heading string gets decomposed into its '#' (hash) based flag and its text content part. This is done with the help of following regex ... /^(?#+)\s*(?.*?)\s*$/ ... which features named capturing groups. The amount of hashes (flag.length) indicates the current nested level.
QUESTION
I'm a c++ beginner and now reading the C++ Primer. I have some problem about the destrucor:
in chapter 13.1.3: "In a destructor, there is nothing akin to the constructor initializer list to control how members are destroyed; the destruction part is implicit. What happens when a member is destroyed depends on the type of the member. Members of class type are destroyed by running the member’s own destructor. The built-in types do not have destructors, so nothing is done to destroy members of built-in type."
So if I have such a class:
ANSWER
Answered 2022-Feb-18 at 14:11What the spec means is that no code is run to clean up int i. It simply ceases to exist. Its memory is part of Foo and whenever a Foo instance is released, then i goes with it.
For pointers the same is true, the pointer itself will simply disappear (it's really just another number), but the pointer might point at something that needs to also be released. The compiler doesn't know if that is the case, so you have to write a destructor.
This is why things like std::shared_ptr exist; they are clever pointers (aka 'smart') and the compiler does know if it points at something that needs to be released and will generate the correct code to do so. This is why you should always use smart pointers instead of 'naked' ones (like int *p).
QUESTION
I'm parsing a XML string to convert it to a JsonNode in Scala using a XmlMapper from the Jackson library. I code on a Databricks notebook, so compilation is done on a cloud cluster. When compiling my code I got this error java.lang.NoSuchMethodError: com.fasterxml.jackson.dataformat.xml.XmlMapper.coercionConfigDefaults()Lcom/fasterxml/jackson/databind/cfg/MutableCoercionConfig; with a hundred lines of "at com.databricks. ..."
I maybe forget to import something but for me this is ok (tell me if I'm wrong) :
...ANSWER
Answered 2021-Oct-07 at 12:08Welcome to dependency hell and breaking changes in libraries.
This usually happens, when various lib bring in different version of same lib. In this case it is Jackson.
java.lang.NoSuchMethodError: com.fasterxml.jackson.dataformat.xml.XmlMapper.coercionConfigDefaults()Lcom/fasterxml/jackson/databind/cfg/MutableCoercionConfig; means: One lib probably require Jackson version, which has this method, but on class path is version, which does not yet have this funcion or got removed bcs was deprecated or renamed.
In case like this is good to print dependency tree and check version of Jackson required in libs. And if possible use newer versions of requid libs.
Solution: use libs, which use compatible versions of Jackson lib. No other shortcut possible.
QUESTION
I've use a few intrinsics before with GNAT, but I get an error for __builtin_cpu_is when trying to pass in an Chars_Ptr:
ANSWER
Answered 2022-Jan-12 at 01:19How about trying Target as shown below
Target : constant Interfaces.C.Char_Ptr := Interfaces.C.To_C ("amd");
QUESTION
I'm revisiting the STM chapter of Marlow's book. There, it is stated that:
When multiple threads block on an
MVar, they are guaranteed to be woken up in FIFO order
However, the same can't be done on the STM case:
A transaction can block on an arbitrary condition, so the runtime doesn't know whether any individual transaction will be able to make progress after the
TVaris changed; it must run the transaction to find out. Hence, when there are multiple transactions that might be unblocked, we have to run them all; after all, they might all be able to continue now.
What I don't get is why from this it follows that
Because the runtime has to run all the blocked transactions, there is no guarantee that threads will be unblocked in FIFO order ...
I'd expect that even though we have to run all the transactions in an STM block, we can still wake the threads up in a FIFO order. So I guess I'm missing some important details.
...ANSWER
Answered 2021-Dec-08 at 10:40The point of STM is to speculate: we try running all the transactions hoping that they do not conflict with one another (or perform a retry). When we do discover a conflict, we allow some transactions to commit, while making the conflicting ones to rollback.
We could run only one transaction, wait for it to complete or to block, and then run another one, and so on, but doing so would amount to use a single "global lock", making the computation completely sequential.
More technically, when threads are waiting on a MVar, those threads will progress on a very simple condition: the MVar becoming non empty. On wake up, a thread will take the value, making it empty. So, at most one thread can perform the take, and there's no point in waking more than one.
By constrast, when threads are waiting because of STM, the condition is much more complex. Suppose they are waiting because they previously performed a retry, so they are waiting for some previously read TVar to be changed. When that happens, we can't really know which thread will block again unless we re-run its transaction. Unlike MVar, it is now possible that waking them all up will cause all of them to complete without conflict, so we try doing just that. In doing so we hope for many (if not all) to complete, and prepare to rollback again for those that do not.
Consider this concrete STM example:
QUESTION
I am making a book via bookdown.
I know it is possible to omit headings from the Table of Contents by adding the attributes {.unlisted .unnumbered}, as shown in Section 4.18 of the R Markdown Cookbook.
However, how can I add arbitrary content to the Table of Contents?
If I only needed to add this for the PDF output, I could use (e.g.) the LaTeX command \addcontentsline, but I need this to show in the HTML contents sidebar as well.
For example, if you set up a new default bookdown project from RStudio, it includes the file 01-intro.Rmd.
The first few lines are
ANSWER
Answered 2021-Dec-05 at 23:10Maybe this solution?
CSS-file:
QUESTION
I followed Simon Marlow's book on parallel Haskell (Chapter 1) using rpar/rseq .
Below is the code (Solving the Squid Game bridge simulation):
...ANSWER
Answered 2021-Oct-29 at 23:24You aren't actually using any parallelism. You write
QUESTION
I have been reading chapter 17 in The Rust Programming Language and I have been trying to use trait objects in my code.
Could someone please explain why the function test2 does not compile while the others do?
ANSWER
Answered 2021-Oct-28 at 08:22By default when boxing it is gonna take as a box of the espeficit type you are boxing. In your case would be Box. If you annotate the type specifically then it works:
QUESTION
I'd like to define a helper function to help me compose some boolean filters more clearly.
This is a working example of the result using the iris dataset
ANSWER
Answered 2021-Oct-12 at 10:47You can wrap the expression in your function with quo() and use the !! operator to defuse it in the filter() call.
QUESTION
I am working may way through the Rust book, and it has this code snippet:
...ANSWER
Answered 2021-Sep-01 at 18:08Here is a version of the first function with all the lifetimes and types included, and the for loop replaced with an equivalent while let loop.
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