guihao-liang

package main

import "fmt"

//
// https://commandcenter.blogspot.com/2014/01/self-referential-functions-and-design.html
//
// self-referential definition
// recursive definition
// it's like linked list

guihao-liang

class Example(object):
    """A singleton not thread safe
    """

    _instance = None

    @classmethod
    def instance(cls):
        if cls._instance is None:
            cls._instance = cls.__new__(cls)

guihao-liang

; ----------------------------------------------------------------------------------------
;
; In macOS land, C functions (or any function that is exported from one module to another, really) 
; must be prefixed with underscores.
;
; The call stack must be aligned on a 16-byte boundary.
;
; And when accessing named variables, a `rel` prefix is required.
;
;     nasm -fmacho64 hello_with_c.asm && cc hello_with_c.o && ./a.out