johnny-morrice

from unittest import TestCase, main

def valid_parentheses(string):
    x = 0
    for char in string:
        if char == '(':
            x += 1
        elif char == ')':
            if x == 0:
                return False

johnny-morrice

type goPool struct {
    hold sync.WaitGroup
    work chan func()
    ready chan bool
}

func newGoPool(jobs uint) *goPool {
    pool := &goPool{}
    pool.ready = make(chan bool, jobs)
    pool.work = make(chan func())