routines | golang go routine management | SQL Database library
kandi X-RAY | routines Summary
kandi X-RAY | routines Summary
Golang package for enhanced goroutine synchronization and well defined idiomatic Golang services.
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QUESTION
I have a test file in my module's t/
directory that does a use
on a TestUtils
files which has some variables and routines:
ANSWER
Answered 2022-Apr-10 at 23:35Comma doesn't handle this situation perfectly; it understands (following the IntelliJ platform naming conventions):
- Source roots, which are used as roots for resolving
use
statements within the project (anything not resolved is assumed to be from the module ecosystem) - Test roots, where test files are found (used for, for example, being able to run tests in an
xt
directory)
These are, however, mutually exclusive. If the TestUtils
module were to be placed in a lib
directory inside of t
, then that lib
directory could be marked as a source root, and the symbols should be resolved.
QUESTION
I created the default IntelliJ IDEA React project and got this:
...ANSWER
Answered 2021-Nov-15 at 00:32Failed to construct transformer: Error: error:0308010C:digital envelope routines::unsupported
The simplest and easiest solution to solve the above error is to downgrade Node.js to v14.18.1. And then just delete folder node_modules
and try to rebuild your project and your error must be solved.
QUESTION
I'm developing an app where users can create routines and set reminders for these routines.
I use alarms scheduled by AlarmManager and a BroadcastReceiver to call a foregroud service that sends a notification by using the notification manager. Here's some code:
...ANSWER
Answered 2022-Mar-31 at 07:49You should check the specifications of the device that is laggy and monitor RAM and CPU usage of the device, before, after and during your app runtime, speatially the RAM usage, maybe Android 30 is putting too much pressure on device and that is causing the issue.
In General the issue that are seen on some devices and not on another are caused ether by the difference between Android Versions and their resource handling methods or bottleneck between Hardware and Software on same OS version on different devices.
You can monitor device resource usage ether by Android Studio's own resource monitor tool "Android Profiler" or third party Resource Monitoring Apps found on Google Play.
If there is a process or function in your App that causing the resource leak you can fix it easily by detecting it from android profiler but if the issue is caused by OS Resource handling or Hardware and Software bottleneck you should skip that device.
QUESTION
I am using a company-hosted (Bitbucket) git repository that is accessible via HTTPS. Accessing it (e.g. git fetch
) worked using macOS 11 (Big Sur), but broke after an update to macOS 12 Monterey.
*
After the update of macOS to 12 Monterey my previous git setup broke. Now I am getting the following error message:
...ANSWER
Answered 2021-Nov-02 at 07:12Unfortunately I can't provide you with a fix, but I've found a workaround for that exact same problem (company-hosted bitbucket resulting in exact same error).
I also don't know exactly why the problem occurs, but my best guess would be that the libressl library shipped with Monterey has some sort of problem with specific (?TLSv1.3) certs. This guess is because the brew-installed openssl v1.1 and v3 don't throw that error when executed with /opt/homebrew/opt/openssl/bin/openssl s_client -connect ...:443
To get around that error, I've built git from source built against different openssl and curl implementations:
- install
autoconf
,openssl
andcurl
with brew (I think you can select the openssl lib you like, i.e. v1.1 or v3, I chose v3) - clone git version you like, i.e.
git clone --branch v2.33.1 https://github.com/git/git.git
cd git
make configure
(that is why autoconf is needed)- execute
LDFLAGS="-L/opt/homebrew/opt/openssl@3/lib -L/opt/homebrew/opt/curl/lib" CPPFLAGS="-I/opt/homebrew/opt/openssl@3/include -I/opt/homebrew/opt/curl/include" ./configure --prefix=$HOME/git
(here LDFLAGS and CPPFLAGS include the libs git will be built against, the right flags are emitted by brew on install success of curl and openssl; --prefix is the install directory of git, defaults to/usr/local
but can be changed) make install
- ensure to add the install directory's subfolder
/bin
to the front of your$PATH
to "override" the default git shipped by Monterey - restart terminal
- check that
git version
shows the new version
This should help for now, but as I already said, this is only a workaround, hopefully Apple fixes their libressl fork ASAP.
QUESTION
I have updated node
today and I'm getting this error:
ANSWER
Answered 2021-Oct-27 at 17:19Ran into the same issue with Node.js 17.0.0. To solve it, I downgraded to version 14.18.1, deleted node_modules
and reinstalled.
QUESTION
I am storing a public key in a env variable as a string. This public key is from a .pem file. When I try to use it in my code, I get the following error
...ANSWER
Answered 2022-Mar-28 at 08:47Your key seems to be a PEM encoded public key in X.509/SPKI format. However, the line breaks are missing. These are to be set so that header and footer are each on a single line. In the body there is a line break after every 64 characters.
A correctly formatted PEM key can be processed directly by createPublicKey()
. The key will be accepted even if the line breaks in the body are missing, but header and footer must be in different lines, otherwise the posted error message will be displayed: error:0909006C:PEM routines:get_name:no start line.
Example:
QUESTION
I got this error when learning Next.js, using npx create-next-app
command according to site documentation here https://nextjs.org/docs/api-reference/create-next-app. Everything works until I start the server,
Error stack:
...ANSWER
Answered 2021-Nov-24 at 21:38I found this solution https://github.com/webpack/webpack/issues/14532
if using bash just run
NODE_OPTIONS=--openssl-legacy-provider
before any commandadding
NODE_OPTIONS=--openssl-legacy-provider
to package.json
QUESTION
I am building a Gatsby site. I upgraded Node.js to v17.0.1, and when I run a build, there is an error:
...ANSWER
Answered 2022-Jan-04 at 23:33Gatsby must be using an algorithm or key size which is no longer allowed by default with OpenSSL 3.0.
UPDATE ⚠️This is most likely a webpack issue - https://github.com/webpack/webpack/issues/14532
They have since released a fix in version 5.61.0 - https://github.com/webpack/webpack/releases/tag/v5.61.0 - so upgrading webpack should address the issue as well
A member of the webpack team has stated they do not plan to backport the fix to webpack 4, so if you are on webpack 4 you may need to look to upgrading to webpack 5 first.
From Node.js 17's announcement post:
If you hit an
ERR_OSSL_EVP_UNSUPPORTED
error in your application with Node.js 17, it’s likely that your application or a module you’re using is attempting to use an algorithm or key size which is no longer allowed by default with OpenSSL 3.0. A new command-line option,--openssl-legacy-provider
, has been added to revert to the legacy provider as a temporary workaround for these tightened restrictions.
Running this on the terminal might look like:
QUESTION
It's been fairly well-asked here if negative indices are allowed in C, but I'm curious of there is any performance downside to using this technique frequently. For example, does it break the compiler's ability to use the base+offset indexing on some hardware platform somewhere, or confuse the optimizer, etc.
I ask because I have a lot of decoding routines with the signature of
...ANSWER
Answered 2022-Jan-21 at 07:40For example, does it break the compiler's ability to use the base+offset indexing on some hardware platform somewhere, or confuse the optimizer, etc.
No. C language standard clearly define it:
From C11 Standard#6.5.6p8:
8 When an expression that has integer type is added to or subtracted from a pointer, the result has the type of the pointer operand. If the pointer operand points to an element of an array object, and the array is large enough, the result points to an element offset from the original element such that the difference of the subscripts of the resulting and original array elements equals the integer expression. In other words, if the expression P points to the i-th element of an array object, the expressions (P)+N (equivalently, N+(P)) and (P)-N (where N has the value n) point to, respectively, the i+n-th and i-n-th elements of the array object, provided they exist. ....
Just, in case, if you are not aware:
From C11 Standard#6.5.2.1p2, the definition of subscript operator:
The definition of the subscript operator [] is that E1[E2] is identical to (*((E1)+(E2))).
Your another question:
but I'm curious of there is any performance downside to using this technique frequently.
It boils down to question - There are two number a
and b
, out of these two operations - a + b
and a - b
, which operation is faster than other.
It's not the language that dictate time for operations like addition, subtraction etc., but it's the underlying processor. If you are really interested in it, you have to dig down to the instruction set of underlying processor and compare the latency of respective instructions etc..
QUESTION
I'm trying to implement an efficient segmented prime sieve in C. It's basically a sieve of Eratosthenes, but each segment is split to a size that can well fit in cache.
In my version, there is a bit array of flags in which each bit is a consecutive odd number. Each bit is erased by masking with AND
when it is a multiple of a known prime number.
This single part of code consumes about 90% of runtime. Each dirty bit of code has a reason for it that I explained in comments, but the overall operation is very simple.
- Grab a prime number.
- Calculate its square and its multiple that is slightly bigger than the number that the starting point of the cache block represents.
- Take the bigger one.
- Erase the bit, add the base prime number to itself two times, and repeat until the end of the cache block.
And that's it.
There is a program called primesieve
which can do this operation very fast. It is about 3 times faster than my version. I read its documentation about the algorithm and also its code, and applied whatever is plausible to my code.
Since there is a known program a lot faster than mine, I will investigate further what they're doing and what I'm not, but before that, I posted this question to get extra help if you can help me find out which part is not running efficiently.
Saying again, this single routine consumes 90% of runtime, so I'm really focused on making this part run faster.
This is the old version, I've made some modifications after the post, and that one's below this one. The comments still apply.
...ANSWER
Answered 2022-Jan-16 at 20:45You might be sieving, but what about counting? And a upper limit, so one can compare? And OMP like primesieve
?
You are stuck because you are not even counting or comparing, only with yourself.
I made a segmented sieve just with a 30Kb char
array. At 2 billion, it takes quite exactly 3 times as long as primesieve
, and works with OMP. So all your bit mapping and unrolling is not measurable.
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