myexpress | Js Foo workshop , Build your own express js framework | Runtime Evironment library
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kandi X-RAY | myexpress Summary
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QUESTION
I am studying node.js and on the localhost I can perfectly do the below exercise but When I try to do it on my real website it fails. After hours of search, I am not sure what I am missing. Anyhelp will be really appreciated.
...ANSWER
Answered 2021-May-17 at 11:45Your port needs to be different in your server.listen. Change it to the one provided by your hoster - please provide some more info.
Example:
QUESTION
We have a DynamoDB table which has an attribute counter, which will be decremented asynchronously by multiple lambda based on an event. I am trying to update the counter using UpdateItemEnhancedRequest (using the Dynamodb Enhanced Client. - JAVA SDK 2). I am able to build the condition for updating the counter but it updates the entire item and not just the counter. Can somebody please guide on how to update a single attribute using DynamoDb Enhanced Client?
Code Sample
...ANSWER
Answered 2021-Feb-03 at 17:11When you update a specific column, you need to specify which column to update. Assume we have this table:
Now assume we want to update the archive column. You need to specify the column in your code. Here we change the archive column of the item that corresponds to the key to Closed (a single column update). Notice we specify the column name by using the HashMap object named updatedValues.
QUESTION
i have a written a crawler in axios and trying to send file via express, i have around 10 crawlers and 10 html forms methods in express
but when i press button it downloads blank file and then crawlers start to run
it should download file when crawler is finished and save data. but how to do that?
below is the code:
crawler code:
...ANSWER
Answered 2020-Aug-19 at 06:30crawler.getAgents needs to return a promise that doesn't resolve until after the file is written.
So something like:
QUESTION
I was trying something like this
...ANSWER
Answered 2020-Aug-13 at 15:37In Scala, you can explicitly declare number literal as Long by adding L
suffix. If you do that types would be correctly inferred as Long
:
QUESTION
It would be best if I could just use the rename command. But I think we have to use two regex.
The sed command that is working is
...ANSWER
Answered 2020-Jul-11 at 05:32zsh:
QUESTION
My aim is to get TypeSyntax
by ITypeSymbol
with Roslyn.
I do it this way:
ANSWER
Answered 2020-Jul-08 at 15:05If you want to control the string representation of a symbol (to be programming language specific, for example), you need to use a SymbolDisplayFormat
and feed it to 'symbol.ToDisplayString()`.
QUESTION
I have a simple text file with lines containing backslash (\something). When reading it in Perl scripts on the command line, I get the text lines exactly as they are in the file. When EXACT SAME lines of code are copied and pasted into a CGI script, the text file contents are read differently by adding one more backslash for each backslash. I spent two days on searching various forums (StackOverflow, PerlMonks, etc.) but could not find probable cause. Below is the code and text file. Any help is greatly appreciated.
...ANSWER
Answered 2020-Mar-06 at 20:24Please see if following coding style will be more appropriate
QUESTION
Suppose we have a simple data class like this:
...ANSWER
Answered 2020-Feb-28 at 19:52Member pointers and regular pointers are completely different types. There is nothing you can add or remove to go from a member pointer to a regular object pointer. You need a dedicated type trait.
QUESTION
Suppose I have a foreach
inside of a pipe:
I'd like to iterate through the following:
@split(split(item().name,'_')[4],'-')[1]
However, I'd like to pass this formula in through a parameter.
I've defined a parameter myExpression
with the desired value in the pipeline, and attempting to reference it like so:
Note that the full expression would be: {@pipeline().parameters.myExpression}
However, data factory does not execute that expression, rather it just accepts it as a verbatim string:
{@pipeline().parameters.myExpression}
How do we pass in an expression from parameters from within the pipeline?
...ANSWER
Answered 2020-Jan-02 at 12:17your description lacks a lot of context of what are you trying to do. I can only presume that you generate array in one pipeline and you want to iterate it in another. Looking at your print screen it looks like you typed in your value, therefore output is a plain text. you should hit dynamic context
so it would look like this:
QUESTION
I have this code I took from __FILE__ macro manipulation handling at compile time:
...ANSWER
Answered 2019-Dec-21 at 02:05No, this is impossible. In array-to-pointer decay the type is adjusted from array of size N
to pointer to
. It is a many-to-one mapping that looses information about the size.
Templates can only differentiate based on types (and value categories), so the information about the array size will not be available to them anymore.
The size information may still be reproduced as the length of the contained null-terminated string (if those are assumed to be equal), e.g. in a constexpr
function by searching for the pointed-to-string's null-terminator. This constant value could then be used in place of the original size of the array in a template argument or similar value-dependent type, producing again a type that differentiates on the size.
But that is not working in the way you want to call length
, since there is no template argument or the like involved and you are also not returning a pointer to the beginning of the array of the string literal from pathlast
.
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