sullyj3

fn main() {
    let xs: Vec<Box<dyn PrintableNumber>> = vec![Box::new(Foo), Box::new(Bar)];
    print_each(xs);
}

struct Foo;
struct Bar;

// Combined trait that requires both ToString and ToInt
trait PrintableNumber: ToString + ToInt {}

sullyj3

letterChar : Char -> Boolean
letterChar c = List.contains c <| toCharList "abcdefghijklmnopqrstuvwxyz"

groupAnswers : Text -> Map Char Nat
groupAnswers gr =
  combine : Map Char Nat -> Char -> Map Char Nat
  combine accMap c =
    if letterChar c then
      use Nat +
      putWith (+) c 1 accMap

sullyj3

/**
 * Observable version of the above
 */
function drawRectsObservable() {
    // implement this function!
    const svg = document.getElementById("drawRects")!,
        mousedown = Observable.fromEvent<MouseEvent>(svg, 'mousedown'),
        mousemove = Observable.fromEvent<MouseEvent>(svg, 'mousemove'),
        mouseup = Observable.fromEvent<MouseEvent>(svg, 'mouseup'),

sullyj3

class Observable<Input> {
  // ... SNIP

  /** Create two new observables, where one contains only those inputs for which the condition
   * holds, and the other contains only those for which the condition does not hold
   */
  splitBy(condition: (_:Input)=>boolean): [Observable<Input>, Observable<Input>] {
      const yes = this.filter(condition);
      const no  = this.filter(i => ! condition(i));

sullyj3

#include <stdio.h>

void print_prototype(int num_elements);
void print_func(int num_elements);
void sort_func_generator(int num_elements);

int main(int argc, char *argv[]) {
	int num_ints;
	scanf("%d", &num_ints);
	sort_func_generator(num_ints);

sullyj3

#######################################
# suggestion for an additional for-loop structure.
#######################################

for x in y while condition:
    do_stuff()

# as syntax sugar for:

for x in y:

sullyj3

def checkio(text):
    nopunc=""
    alph="abcdefghijklmnopqrstuvwxyz"
    for char in text:
        if char.lower() in alph:
            nopunc+=char.lower()
    
    maxcount=1
    mostfreq=""