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

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

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

duobei

#Person
class Person
end

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

duobei

#0> non-block call

Thread.new do
  blahbla...
end

#1> 4 simple ways to call shell or cmd

`ps aux`

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def block_new
  puts Proc.new.call
end

block_new{"hello"}

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

duobei

ROOT_PATH = os.path.dirname(os.path.abspath(__file__))

if ROOT_PATH not in sys.path:
    sys.path.append(ROOT_PATH)
    
sys.path.insert(0,ROOT_PATH);

duobei

python -m SimpleHTTPServer 8000

duobei

• gcc -M hello.c 可以得到某文件依赖的头文件。

• grep processor /proc/cpu_info 显示当前的CPU数目

• sudo shutdown -r now 重启机器

• sshfs yourname@host:/path/to/your/dir ~/local sshfs挂载到本地

• sudo -u fleuria bash: 切换用户

duobei

// from http://www.nowamagic.net/librarys/veda/detail/802

// 简单版
function dump_obj(aObject) {
  var s = "";
  for (var property in aObject) {
    s = s + "\n " + property + ": " + aObject[property];
  }
  alert(s);
}