john9631

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john9631

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john9631

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john9631

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john9631

# Conventionally

    if var < 900
        println("Hello World")
    end


# Short circuit evaluation

    var < 900 && print("Hello World") 

john9631

function middle(i)
  let s = string(abs(i)) , l = length(s) , mid = int((l+1)/2)
    l < 3 ? 
        "error: not enough digits"  :
    iseven(l) ? 
        "error: number of digits is even"  :
        join((s[mid-1],s[mid],s[mid+1]))
  end
end

john9631

def fib(n):
    """ old fib exponential complexity ? """
    if n == 0 or n == 1:
        return 1
    else:
        return fib(n - 1) + fib(n - 2)
 
#Julia
fib(n::Integer) = return(n > 1 ? (fib(n-1) + fib(n-2)) : one(n))

john9631

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john9631

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john9631

def memoize(f):
    def mem(x):
        if x not in cache:
            cache[x] = f(x)
        return cache[x]
    cache = {}
    return mem

#@memoize
def fib(n=1):