tco | TCO is a tail-call optimization library
kandi X-RAY | tco Summary
kandi X-RAY | tco Summary
TCO is a tail-call optimization library. It's a proof-of-concept attribute macro you can slap onto item functions to optimize them if they are in tail-calling format.
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QUESTION
I wanted to try out in Dart some algorithms and patterns from Functional Programming, but a lot of them rely heavily on recursion, which might incur in serious memory leaks without Tail Call Optimization (TCO), which isn't mandatory for when implementing a language.
Is there an official statement on this topic from the Dart team or something about it in the documentation? I could probably figure out if this is currently present in the language by using Dart's Dev Tools and Profiling, however this way I would never be able to know the Dart team's intentions with respect to the topic, hence the raison d'être of this question.
...ANSWER
Answered 2021-Feb-25 at 08:55Dart does not support tail-call optimization. There are no current plans to add it.
The primary reason is that it's a feature that you need to rely on in order to use, otherwise you get hugely inefficient code that might overflow the stack, and since JavaScript currently does not support tail call optimization, the feature cannot be efficiently compiled to JavaScript.
QUESTION
EDIT
To me JSON.stringify
is not the solution here, as it is much slower than recursion
ANSWER
Answered 2021-Jan-13 at 20:58This solution is about 50% faster and also works with more than one css property
QUESTION
I'm trying to build a typeahead off a service that returns JSON however my code is returning [object Object] instead of the values. What am I doing wrong? It seems like something to do with my typeaheadoption not correctly mapping to result however I'm not sure why this would happen. This comes from the HTTP Async example from ngx-bootstrap: https://valor-software.com/ngx-bootstrap/#/typeahead
Here's my code for the component and HTML:
...ANSWER
Answered 2021-Jan-11 at 18:28The problem is that the typehead doesn't know how to retrieve the value from the field name 4. region
since it is invalid according to its internal implementation!
A proper solution is to declare your interface like follow:
QUESTION
I see from this question that it can be an antipattern to mix Promise
s with async
code.
Does this, however, apply in all cases?
I can't see an easy way to avoid combining them in the following code:
- It's an alternative to
setInterval
which waits for an invocation to complete before scheduling the next one - However, unlike recursive
setTimeout
, it does not constitute an open memory leak in browsers that don't yet support TCO
Does this code embody an antipattern? And, if so, how can I remedy it without introducing a memory leak?
See, in particular, line 10: new Promise( async (resolve) => {
—this seems very non-idiomatic, but I don't see another way to accomplish: wrapping an await
statement in a while
loop per se, dispatching it, and returning a handle to abort the loop.
ANSWER
Answered 2020-Dec-24 at 03:16The problem that the other question was warning about, and that could be a problem here, is that if the inside of the async callback passed to the Promise constructor awaits something that rejects, the Promise will hang instead of rejecting. Your current code will not result in f
ever rejecting, but setRepeatedTimeout
were to carry out a task which may reject, you'd get an unhandled rejection and permanent hanging:
QUESTION
ANSWER
Answered 2020-Nov-23 at 11:49Writing this helped me to solve this issue
QUESTION
I am new to openModelica
this is "working" but I want to take input in this model file using OMshell
How to take input instead of = 10; I have not used function as der() is not allowed in function
...ANSWER
Answered 2020-Nov-10 at 12:16You wanted this:
QUESTION
step_n(0, I, I).
step_n(N, In, Out) :-
N > 0, plus(N1, 1, N), phase_step(In, T),
step_n(N1, T, Out).
...ANSWER
Answered 2020-Oct-30 at 10:57Will this depend on phase_step having a single solution?
Kind of, but a bit stronger still: It depends on phase_step
being deterministic, which means, not leaving any "choice points". A choice point is a future path to be explored; not necessarily one that will produce a further solution, but still something Prolog needs to check.
For example, this is deterministic:
QUESTION
Im trying to collect the foreign key mapping from system tables. And I used this below query.
query 1: ...ANSWER
Answered 2020-Oct-09 at 06:22Use SELECT DISTINCT...
to remove duplicates
QUESTION
I need to find which rows of df1 are present in df2 by extracting for the words after "gene_id" in df1$Id and searching for them in 2 different columns of df2 (df2$Gene.id, df2$Gene.name).
This is how my data looks:
...ANSWER
Answered 2020-Jul-14 at 16:41This did the trick using your example. I'm asuming all your data follows the same format.
You'll need to create a clean "all in" column to join df1
with df2
. After doing two joins, clean the useless rows and update the values of the NA
s using your "all in" column.
- Create new column to separate.
- Separate the rows with multiple values.
- Remove the "gene_id " so you can have your clean "all in" column to join.
- Join by one column then by the other one. Order doesn't matter.
- Filter rows without any match.
- Update your
NA
s - Remove
new_col
because you don't need it anymore
QUESTION
I am trying to learn curl. I need to pass a variable from Ionic to PHP file.
Here is the code so far, I want to write the variable passed instead of hardcoded value "Saurabh\"
Ionic / Angular .ts code
...ANSWER
Answered 2020-Jul-13 at 03:41Update the post fields like this...
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