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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 |
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class Example(object): | |
"""A singleton not thread safe | |
""" | |
_instance = None | |
@classmethod | |
def instance(cls): | |
if cls._instance is None: | |
cls._instance = cls.__new__(cls) |
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; ---------------------------------------------------------------------------------------- | |
; | |
; 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 |