idea's blog

The Google leveldb is just a c++ library, cannot be directly used by PHP/Java/Python. As it is a library, data can’t be accessed across multi machines(not even multiprocesses in one machine).

SSDB(or zdb) is a network server that wrapping leveldb library, more important, besides key-value data type, SSDB supports zset(sorted set) and hash data type. Zset is the most valuable data type that widely used with Redis, to describe business abstracts such as inbox/outbox of a messaging system, posts list of a news site, etc.

SSDB’s client APIs currently including PHP, Python, Cpy, and more can be added easily.

Here is a list of SSDB features:

• Network wrapping of Google leveldb, client-server supports
• Persistent key-value, key-zset, key-hash storage
• Very fast(benchmark)

SSDB project: http://code.google.com/p/zdb/

Cpy provides you a C-like way to write Python programs. And now, Cpy is open source(the ANTLR grammar files).

Download from here

A few ignorant Python programmers said that Python never neads a C-like for statement, they thought they can replace every C-like for looping to Python’s for.

Cpy‘s way to loop:

for(i=s; i<num; i+=step){
}

Python’s way to loop:

for i in range(num)[s:e:step]:

Recently I wrote a looping to loop 100000000, unfortunately (and as expected) Python eat up all memory(2 GB) of the whole machine and OS forces it to quit.

But a Cpy looping works fine.

Cpy is the real general purposed dynamic c-like syntax scripting language in the 21st century, totally built-up by a Chinese software engineer.

Cpy provides you a way to write Python codes in C syntax!

Like other C-like programming languages, it borrows the idea of C programming language, and many other C-like programming language, such as Java, JavaScript, PHP.

It uses the Python programming language’s type model and runtime, but with a very clean and clear and elegant syntax. Since it is built on the Python runtime, all Python’s built-in modules and Python sources can be easily reused with an import.

Programmer who has the expirence of Java/JavaScript/PHP development will have no difficulty to write his first Cpy codes, the learn cost is zero. It is a good idea for C programmers who never met a scripting language to start writing scripting codes with Cpy.

Google project: https://code.google.com/p/cpy-scripting-language/

Multi-thread programming with Cpy is quit easy. Just import the thread module, then use thread.start_new_thread(func, args) to run a function as a thread.

import time;
import thread;

function run(){
    while(true){
        printf("thread: %d says hello\n", thread.get_ident());
        time.sleep(1);
    }
}


foreach(range(0, 3) as i){
    args = tuple();
    thread.start_new_thread(run, args);
}

// press Enter to quit
stdin.readline();

Output:

thread: 5032 says hello
thread: 4708 says hello
thread: 5676 says hello
thread: 5032 says hello
thread: 4708 says hello
thread: 5032 says hello
...