jnm2

[user]
    name = jnm2
    email = [email protected]
[core]
    pager = cat
    autocrlf = true
    editor = 'C:/Program Files/Notepad++/notepad++.exe' -multiInst -notabbar -nosession -noPlugin
[fetch]
    prune = true
[alias]

Dorus

public static class Extended {
    public static IObservable<TSource> Amb<TSource>(this IObservable<IObservable<TSource>> source) {
        return Observable.Create<TSource>(o => {
            int first = -1;
            return source.TakeWhile(_ => first == -1)
                .Select((el, c) => el
                    .DoFirst(1, _ => Interlocked.CompareExchange(ref first, c, -1))
                    .TakeWhile(_ => first == c))
                    .Merge().Subscribe(o);

spencerwi

(defn fold_ [f initial [head & the-rest :as arr]] 
  (cond 
    (empty? arr) initial 
    :else (recur f (f initial head) the-rest)))

(defn map_ [f arr]
  (let [applyF (fn [previous current] (conj previous (f current)))]
    (fold_ applyF [] arr)))

(defn filter_ [predicate arr]