I was just reading a bit about the HQ9+ programming language: https://esolangs.org/wiki/HQ9+, https://en.wikipedia.org/wiki/HQ9+, and https://cliffle.com/esoterica/hq9plus, and it tells me someth...

I'm working through "Learn Prolog now" online book for fun. I'm trying to write a predicate that goes through each member of a list and adds one to it, using accumulators. I have already done it e...

If you're writing assembly, does it matter which registers you allocate values to? Say, you store an accumulated/intermediate value in %ebx instead of %eax, which was traditionally used for that pu...

I'm looking for a fast solution to MATLAB's accumarray in numpy. The accumarray accumulates the elements of an array which belong to the same index. An example: a = np.arange(1,11) # array([ 1, 2,...

Say I have three arrays depicting some names, number of books read and how awesome these people [in names] are: let names = ["Mary", "Joe", "Kenan"]; let numberOfBooks = [2, 1, 4]; let awesomeness...

After a long search on google I couldn't find a clear answer of this: In Prolog doing recursion by itself its easy. My main problem is understanding where to place accumulators and counters. Here i...

I have a table like this one: SELECT value FROM table; value 1 3 13 1 5 I would like to add an accumulator column, so that I have this result: value accumulated 1 1 3 4 13 17 1 18 5 23 Ho...

I see code like: mov ax, cs mov ds, ax mov es, ax Why can't I just compress this to: mov ds, cs mov es, cs Is the first way faster since its using the accumulator register? But that wouldn't ...

I have the following code: val blueCount = sc.accumulator[Long](0) val output = input.map { data => for (value <- data.getValues()) { if (record.getEnum() == DataEnum.BLUE) { blueCount +=...

Please I want to draw accumulator output for opencv hougcircles function. . The function run ok and detected the circle (center&radius) only I want to show the accumulator for this function T...

When you call reduce and pass it a function and two arguments, can the first argument be considered to be an accumulator? Is it always an accumulator? Is it sometimes an accumulator? I was readi...

In Java 8, Stream has a method reduce: T reduce(T identity, BinaryOperator<T> accumulator); Is the accumulator operator allowed to modify either of its arguments? I presume not since the J...

I am learning Prolog under my Artificial Intelligence Lab, from the source Learn Prolog Now!. In the 5th Chapter we come to learn about Accumulators. And as an example, these two code snippets are...

I'm totally new to Haskell so apologies if the question is silly. What I want to do is recursively build a list while at the same time building up an accumulated value based on the recursive calls...

I have Scala code like this var i = 1 for(e <- array) { acc += e * i i += 1 } I need to multiply the first element in the array by 1, the next by 2, the next by 3 and so on adding it all in...

I'm trying to pair together a bunch of elements in a list to create a final object, in a way that's analogous to making a sum of objects. I'm trying to use a simple variation on reduce where you co...

I'm not sure what the difference are, but here are the problems. Write an assignment statement that updates a counter variable named numStudents by 1. would it be: numStudents = numStuden...

In Boost.Accumulator, you can add samples to an accumulator and then extract statistical quantities from it. e.g: acc(1.) acc(2.) acc(3.) cout << mean; // 2 The library has lots of more co...

The mapAndSum function in the code block all the way below combines map and sum (never mind that another sum is applied in the main function, it just serves to make the output compact). The map is ...

I've solved 45 problems from 4clojure.com and I noticed a recurring problem in the way I try to solve some problems using recursion and accumulators. I'll try to explain the best I can what I'm do...

I'm new to Scheme (via Racket) and (to a lesser extent) functional programming, and could use some advise on the pros and cons of accumulation via variables vs recursion. For the purposes of this e...

I have a .txt file that I created with multiple lines. When I run a for loop, with a count accumulator, it skips lines. It skips the top line, and starts with the second, prints the fourth, the six...

I wanted to use boost accumulators to calculate statistics of a variable that is a vector. Is there a simple way to do this. I think it's not possible to use the dumbest thing: using namespace bo...