duobei

def block_new
  puts Proc.new.call
end

block_new{"hello"}

#slow practice
def herp_pass_block(&block)
  derp_call_block &block
end

duobei

#0> non-block call

Thread.new do
  blahbla...
end

#1> 4 simple ways to call shell or cmd

`ps aux`

duobei

#Person
class Person
end

#class method
class Person
  def self.address
    puts "hangzhou"
  end
end

duobei

find . -type f -not -regex '\./\.git.*' | xargs cat | wc -l

duobei

int lookup(char *name, Nameval tab[], int ntab)
{
    int low, high, mid, cmp;

    low = 0;
    high = ntab - 1;
    while (low <= high) {
        mid = (low + high) >> 2;
        cmp = strcmp(name, tab[mid].name);
        if (cmp < 0)

duobei

#Newbie programmer
def factorial(x):
    if x == 0:
        return 1
    else:
        return x * factorial(x - 1)
print factorial(6)


#First year programmer, studied Pascal