30,124
questions
2
votes
1
answer
97
views
How can I obtain the return type of a lambda method in Java?
I'm trying to get the class of the generic type <T> in my Java code. I am using Alibaba's FastJSON for JSON processing. Below are the key parts of my code:
Caller:
public Features ...
- 39
1
vote
2
answers
62
views
Designing function API to avoid object lifetime problems
I've got a function that returns a lambda.
auto make_scanner(std::vector<int> const &v) {
auto begin = v.cbegin();
auto end = v.cend();
return [begin, end] () mutable -> int {
...
- 47.4k
-2
votes
1
answer
73
views
C++: What if a lambda expression captures a r-value by reference [duplicate]
I am trying to work with the lambda expression to wrap some functions to void() ones. The code is as follows:
class VoidFunctionWrapper
{
public:
VoidFunctionWrapper()
{
function_ = [](...
- 25
0
votes
0
answers
16
views
Ping OAuth Token Validation
I am using Ping OAuth authentication for some custom APIs endpoint. We have get token API
https://example.com/auth/as/token.oauth2 for external services to get token and make call to our custom API ...
- 13
0
votes
1
answer
51
views
Async lambda expression not compiling
I have a lambda expression with a Select where a new ResourcesResponse.Resource object is created. The Resource object has a calculated Order field which calls an async repository method called ...
- 2,670
0
votes
1
answer
80
views
Multiple parameters in Lambda function in excel [closed]
In excel, is there a way to create Lambda Functions that can accept any number of parameters in the end?
Like TextJoin function, where the first two parameters are fixed and then from the third ...
- 4,618
0
votes
3
answers
81
views
Can a method access the caller's local variable?
I'd like my output to use singular nouns, when the reported quantity is one. Currently I keep doing things like:
logger.debug("Got {} row{}", rows, rows == 1 ? "" : 's');
but that ...
- 3,748
0
votes
2
answers
102
views
Classes defined by using lambda in Java [duplicate]
I had a test on OOP in Java and they asked how many classes are defined by the code below.
The question is about the lambda expression in this code. The lambda expression initiates an anonymous class, ...
- 3
1
vote
2
answers
65
views
Excel LET LAMBDA function to return category percentile rank
I am working with this data set:
ids
Cat
Val
u1
u
1
u2
u
2
g3
g
3
g4
g
4
g5
g
5
i6
i
6
i7
i
7
i8
i
8
i9
i
9
i10
i
10
I need the the percentile ranks for categories of my IDS. I need to ...
- 13
0
votes
0
answers
38
views
Properties in Lambda Handler appearing being set to null
Why are the properties in my message getting set to null?
When I produce a message to my Kafka topic, I can see the messages with properties assigned in the MSK Kafka UI.
When I print out the ...
- 1,565
-1
votes
2
answers
52
views
Having an item in a list randomly select an item from another list whenever it is randomly selected from the first
I am trying to write a function that generates a random name by selecting a first name from one list and a last name from another list. I want the last item in the last name list to randomly select an ...
1
vote
1
answer
31
views
Can I embed a video data in a webpage and later access the video from the web page?
My question may sound a bit wired but I do have legitimate use.
I am using a Lambda function to process incoming short video files (100-200KB), and package the video using Dash/Hls. The packaging ...
- 475
0
votes
1
answer
45
views
Excel LET function to return filtered values of various size based on a criteria row by row
I am working with this data set:
What I need is to return the list of values corresponding to to each unique category. Seems straight forward and I generated this using excel formula
=TRANSPOSE(...
- 13
1
vote
1
answer
78
views
How GHC captures the enviroment of variables when lambda expressions are used by value or by reference?
In this stackoverflow post there is code in C++ that tries to mimic associated types. When the lambda functions capture the environment(closure) using by reference capture the code compiles but fails ...
- 3,125
0
votes
0
answers
38
views
Pydeequ - Serialize Lambda function
I'm trying to call deequ's rowLevelResultsAsDataFrame function from pydeequ. Things work fine but as soon as I add a lambda function to the Verification Suite checks, I start getting serialization ...
- 768