I was just reading a bit about the HQ9+ programming language ( http://esolangs.org/wiki/HQ9 , http://en.wikipedia.org/wiki/HQ9%2B and http://www.cliff.biffle.org/esoterica/hq9plus.html ), and it tells me something about a so called 'accumulator' which can be incremented, but not be accessed. Also, using the + doesn't manipulate the resu...
In my quest to learn more F#, I tried to implement an "accumulator generator" as described by Paul Graham here. My best solution so far is completely dynamically typed: open System let acc (init:obj) : obj->obj= let state = ref init fun (x:obj) -> if (!state).GetType() = typeof<Int32> && x.GetType() = typeof<Int32> then ...
An statistical accumulator allows one to perform incremental calculations. For instance, for computing the arithmetic mean of a stream of numbers given at arbitrary times one could make an object which keeps track of the current number of items given, n and their sum, sum. When one requests the mean, the object simply returns sum/n. An ...
Hi, 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 How can I do this? What's the real name of what I want to do? Thanks ...