golang RBGを六角に相互変换する.golang

Posted 2021-05-24

package main

import "fmt"

func main() {
	fmt.Println(dec2hex(256, 4))
	fmt.Println(rgb2int(256, 256, 256))
	fmt.Println(int2rgb(0))
}

func dec2hex(n, beam int) string {
	hex := ""
	str := "0123456789abcdef"
	for i := 0; i < beam; i++ {
		m := n & 0xf
		hex = string(str[m]) + hex
		n -= m
		n >>= 4
	}
	return hex
}

func rgb2int(r, g, b int) int {
	return (((r >> 5) << 6) | ((g >> 5) << 3) | ((b >> 5) << 0))
}

func int2rgb(i int) (r, g, b int) {
	return ((i >> 6 & 0x7) << 5) + 16, ((i >> 3 & 0x7) << 5) + 16, ((i >> 0 & 0x7) << 5) + 16
}

python mysqlのcreate_tableをmssqlのものに変换するやつ

#!/usr/bin/env python

# sqlalchemy
# https://github.com/zzzeek/sqlalchemy

# sqlalchemy engine
# http://docs.sqlalchemy.org/en/rel_1_0/core/engines.html

# reflection
# http://docs.sqlalchemy.org/en/latest/core/reflection.html

# printing raw sql from create
# http://stackoverflow.com/questions/2128717/sqlalchemy-printing-raw-sql-from-create

# apt-get install unixodbc unixodbc-dev
# pip install mysql-python pyodbc
# pip install sqlalchemy

from sqlalchemy import create_engine, MetaData, Table
from sqlalchemy.schema import CreateTable
from sqlalchemy.dialects.mysql.base import TINYINT
from sqlalchemy.orm import sessionmaker
from sqlalchemy.ext.declarative import declarative_base
from sqlalchemy.ext.compiler import compiles
from sqlalchemy.exc import ProgrammingError
from sqlalchemy.dialects.mysql import VARCHAR

# mysql
# mysql_engine = create_engine('mysql://user:password@host:port/database')
meta = MetaData(bind=mysql_engine)
enquete_table = Table('enquetes',
                      meta,
                      autoload=True,
                      autoload_with=mysql_engine)

# mssql
mssql_engine = create_engine('mssql+pyodbc://user:password@host/database')
table = CreateTable(enquete_table)

# https://github.com/zzzeek/sqlalchemy/blob/master/lib/sqlalchemy/dialects/mssql/base.py#L738
@compiles(VARCHAR, 'mssql')
def compile_VARCHAR(element, compiler, **kw):
    return compiler.visit_NVARCHAR(element, **kw)

print table.compile(mssql_engine)