ua | Universal Aggregator | SQL Database library
kandi X-RAY | ua Summary
kandi X-RAY | ua Summary
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Top functions reviewed by kandi - BETA
- Process transforms a Message into a maildir
- get fetches the data and content type from the cache
- reload reloads the configuration file .
- ProcessMessage processes the message
- isAtomText reports whether s is an atom text .
- process runs the command
- encNoFoldQuote encodes s into buf .
- encNoFoldLiteral encodes s to buf .
- readConfig reads a config file
- getDate returns the date of the feed
ua Key Features
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Community Discussions
Trending Discussions on ua
QUESTION
I have some react code that is rendering content dynamically via React.createElement
. As such, css is applied via an object. Elements in that dynamic generation can have background image, pointing to a public aws S3 bucket.
It seems that every time my components re-render, the background images are being fetched again from S3. This is delaying the page render. I have S3 meta-data for Cache-Control set on all the objects . Here are request and response headers for background image load -
Response header -
...ANSWER
Answered 2022-Feb-23 at 20:53The reason you're seeing a network request is probably because you're using the Cache-Control: no-cache
header in your request.
As seen here:
The no-cache response directive indicates that the response can be stored in caches, but the response must be validated with the origin server before each reuse, even when the cache is disconnected from the origin server.
Cache-Control: no-cache
If you want caches to always check for content updates while reusing stored content, no-cache is the directive to use. It does this by requiring caches to revalidate each request with the origin server.
Note that no-cache does not mean "don't cache". no-cache allows caches to store a response but requires them to revalidate it before reuse. If the sense of "don't cache" that you want is actually "don't store", then no-store is the directive to use.
See here: https://developer.mozilla.org/en-US/docs/Web/HTTP/Headers/Cache-Control#response_directives
Here is what a full request for a cached asset looks like on my network tab, when the asset returns 304 Not Modified from the validation request. (from S3) This is in a background: url
context.
QUESTION
I had a problem with include order that I cannot explain. I will show you a minimal example with four files:
...ANSWER
Answered 2022-Feb-24 at 14:53I tested the same code in Visual Studio 2022 and got the same error. After my exploration, I found the problem.
Firstly, I copied the contents of A.h and B.h into main.cpp and removed the #include
directive. After compiling, I still got the same error.
Then I tested and found that as soon as I moved namespace std {...}
after the definition of class B
, the error went away.
I read the assembly code generated by the compiler and found that the names generated for GetMap
in main.cpp and b.cpp are different:
main.asm:
GetMap@B@@QEBAAEBV?$unordered_map@UA@@HV?$hash@UA@@@std@@U?$equal_to@UA@@@3@V?$allocator@U?$pair@$$CBUA@@H@std@@@3@@std@@XZ
b.asm:
GetMap@B@@QEBAAEBV?$unordered_map@UA@@HU?$hash@UA@@@std@@U?$equal_to@UA@@@3@V?$allocator@U?$pair@$$CBUA@@H@std@@@3@@std@@XZ
I looked up MSVC's name mangling rules and found U
for struct
and V
for class
. So I change the definition of template<> class hash
to template<> struct hash
. Then the error disappeared.
I think it's legal to use class
keyword instead in the specialization, but I can't find a description of this in the standard.
However, I think the problem may not be that simple. A key issue here is that the specialization of std::hash
in B.cpp appears after the definition of class B
, while in main.cpp the order is completely reversed. I think this violates the ODR and should result in undefined behavior. This is also why the program is correct after swapping the order of the header files (making it consistent with the order in B.cpp).
I looked up some sources and couldn't find a standard description of the problem: In B.cpp, the declaration of GetMap
does not cause unordered_map
to be instantiated, but it is instantiated in the function definition. A specialization of std::hash
was inserted in the middle of declaration and definition, which could cause unordered_map
to see a different definition of std::hash
. Can the compiler see this specialization? Should the compiler choose this specialization? If the compiler can see the specialization, why is the primary template used in the generated assembly code? (The compiler-generated name in B.cpp uses "U", which is for struct
)
QUESTION
Question: How do I get the location of a point after rotation?
Goal: I want to create a triangle given two angles. The user can manipulate two angles (a0,b0)
and the program will determine the third vertex based on the intersection of the two sides.
Explanation: To find the point of intersection of the two sides, I need four points: the endpoints for l1
and l2
. To keep track of the points, I created vertices=[]
. But the array doesn't update the location of the points after the user rotates the sides and changes (a0,b0)
.
Thus, when I retrieve my points, two of them are in their initialized position, and have not been updated after the user rotates the sides. I've searched for this problem online, but to no avail. Any help is appreciated.
MWE:
...ANSWER
Answered 2022-Feb-14 at 06:14In a word: trigonometry. Instead of using the rotate()
function to rotate the drawing frame of reference, use trig to calculate the various vertex positions. Here's code with comments which hopefully explain how this is done:
QUESTION
I fail to enable the CORS for testing with the latest NestJS 8.0.6 and a fresh http + ws project. That said, I want to see the Access-Control-Allow-Origin
in the servers response (so that the client would accept it). Here is my main.ts where I've tried 3 approches: 1) with options, 2) with a method, 3) with app.use. None of them works.
ANSWER
Answered 2021-Sep-20 at 20:29The enableCors
and { cors: true }
options are for the HTTP server (express or fastify). The URL given showing the CORS error came from a socket.io connection. To enable CORS for socket.io
you need to use the options in the @WebsocketGateway()
decorator, like
QUESTION
I have been trying to resolve this but I don't know what I'm missing.
I have a table where I get API information using fetch. I want the input to filter the users as I type on it. This is what I have so far, if it's possible I want to keep using filter() and pure Javascript. I believe my problem is not knowing how to access the information in the rows
const listItems = document.querySelectorAll("#data");
This line seems not to work the way I want it to. Here is the code:
...ANSWER
Answered 2022-Jan-31 at 19:40const listItems = document.querySelectorAll("#data");
selects the table as whole instead of the single table rows. If you specify #data > tr
, you'll get the single rows instead and can iterate through them. Try this:
QUESTION
I want to load the table.html
file, which contains a table with bootstrap classes, on the index page. The problem is that it does not get style after loading the table. What is the reason?
If I import bootstrap libraries in the table.html
file, my problem will be solved, but this solution is not suitable because for each bootstrap library call is loaded, I want to import the desired libraries only once in the index page, and each time my tables load in it.
here is my code: (you can also see https://github.com/yarandish/Challanges)
index.html:
...ANSWER
Answered 2022-Jan-29 at 16:00Due to the widespread use of tables across third-party widgets like calendars and date pickers, we’ve designed our tables to be opt-in. Just add the base class .table to any , then extend with custom styles or our various included modifier classes. ref
So you need manually those classes to the HTML markup:
table
class to the table elementcol
class to each td/th elementsrow
class to each tr elements.
Working demo on replit
QUESTION
I need some help with my auditTime function. The "for . . of" loop should loop through each element of the div HTML collection with the class name "time-block" and assign the number value of that div's id to the variable blockHour. Then, I want to color-code the div based on how it relates to the reading of the currentHour variable. However, something is not working and I cannot figure it out. Thank you! jsFiddle
...ANSWER
Answered 2022-Jan-09 at 21:37You are assigning the new class with $(this).addClass("present")
and so on... $(this)
is not defined. Instead, use $(block).addClass("present")
jsfiddle here: https://jsfiddle.net/fe56bjks/7/
QUESTION
In light of recent malware in existing npm packages, I would like to have a mechanism that lets me do some basic checks before installing new packages or updating existing ones. My main issue are both the packages I install directly, and also the ones I install indirectly.
In general I want to get a list of package-version that npm would install before installing it. More specifically I want the age of the packages that would be installed, so I can generate a warning if any of them is less than a day old.
If I could do that directly with npm, that would be neat, but I'm afraid I need to do some scripting around it.
specific use case:
If I executed npm install react-native-gesture-handler
on 2021-10-22 it would have executed the post-install hook of a malicious version of ua-parser and my computer would have been compromised, which is something I would like to avoid.
When I enter npm install react-native-gesture-handler --dry-run
, it only tells me which version of react-native-gesture-handler it would have installed, but it would not tell me that it would install a version of ua-parser that was released on that day.
additional notes:
- I know that
npm i --dry-run
exists, but it shows only the direct packages. - I know that
npm list
exists, but it only shows packages after installing (and thus after install-hooks have already done their harm) - both only show packages version and not their age
- I do not know how I would get a list of packages that would come with a install-hook before installing them
- pointers to alternative ways to deal with malicious npm packages are welcome.
- so far my best solution would be to do "--ignore-scripts" but that would come with it's own set of problems
ANSWER
Answered 2021-Dec-07 at 07:26To find out the malicious package, you will need a script that will check your package for vulnerabilities against national vulnerabilities database
The National Vulnerability Database includes databases of security checklist references, security related software flaws, misconfigurations, product names, and impact metrics.
Mostly all software companies use application security tools like Veracode, Snyk or Checkmarx that does this usually in a stage before deployment in the CICD pipeline.
If you're looking to achieve this locally, you can try
QUESTION
This the code I wrote in order to find the answer to a programming challenge and it's to insert elements into a element with the values equal to color names and choosing a color form the list will change the color of the below it and it's supposed to be JS only. But my problem is that my code works perfectly on Firefox ,but it does not work in chrome or other browsers.
...ANSWER
Answered 2022-Jan-02 at 08:25If this works properly in Firefox might be in chrome JavaScript is disabled.
QUESTION
I am trying to try a sample project in Flutter integration email and google based login, and planning to use firebase initialisation for doing it while I have followed all the steps as mentioned in tutorials I am getting this error as soon as firebase is attempted to be initialised.
...ANSWER
Answered 2021-Dec-25 at 09:13UPDATE:
For your firebase_core
version is seems to be sufficient to pass the FirebaseOptions
once you initialize firebase in your flutter code (and you don't need any script tags in your index.html
):
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