gardyna

# This example assumes binary operators, but this is easy to extend.
# Comes from this excellent article: http://blog.reverberate.org/2013/07/ll-and-lr-parsing-demystified.html
ops = {
  "+": (lambda a, b: a + b),
  "-": (lambda a, b: a - b),
  "*": (lambda a, b: a * b),
  "/": (lambda a, b: a / b)
}

def eval(expression):

gardyna

// BynaryTree.cs
using System;
using System.Collections;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Threading.Tasks;


// all code copy pasted in haste

gardyna

#list construction
my_dict = dict()
for l in lists:
    for name in lst:
        my_dict[name] = my_dict.get(name, 0)+1
        # dict.get(key, default) return value associated with key or default if none is found