johwanghee

def extract_hash_tags(s):
    tags = set([i for i in s.split() if i.startswith("#")])
    tags = set([re.sub(r"(\W+)$", "", j, flags=re.UNICODE) for j in tags])  # encoded
    tags = set([re.sub(r"#+", "#", k) for k in tags])  # remove duplicate hash
    return tags

johwanghee

import requests
import re
import time

url_base = 'http://xxx.site/{}.mp3'

def download(name):
	url = url_base.format(name)
	print(url)
	r = requests.get(url, allow_redirects=True)

johwanghee

# Decimal to Hex
'{:02x}'.format(100000)

import base36
# base36 https://pypi.python.org/pypi/base36/0.1.1
base36.dumps(100000)

johwanghee

package main

import "fmt"
import "strings"

func main() {
	path := "folder/path/filename.mp4"
	fmt.Println(strings.LastIndex(path, "/"))
	fmt.Println(path[:strings.LastIndex(path, "/")])
	fmt.Println(path[:strings.LastIndex(path, ".")])

johwanghee

echo '0002' | xxd -r -p | nc localhost 8888 | xxd -l 120 -ps -c 100

echo -ne '0002' | sed -e 's/../\\x&/g'

johwanghee

package main

import (
  "encoding/hex"
  "fmt"
)

func main() {
	bs := make([]byte, 7)
	copy(bs[:], "0000003")

johwanghee

s := fmt.Sprintf("number is %d, string is %s", 1234, "STRING")
fmt.Println(s)

johwanghee

/* print JAVA */
System.out.println(String.format("Hi, My name is %s. I'm %d years old.", "HWANG", 30));

/* print GO */
fmt.Printf("Hi, My name is %s. I'm %d years old.\n", "HWANG", 30)

johwanghee

$ vi hello.sh

(hello.sh)
#!/bin/bash
echo hello world

$ chmod 755 hello.sh

$ ./hello.sh
hello world

johwanghee

/* Java */
Calendar cal = Calendar.getInstance();
SimpleDateFormat fmt = new SimpleDateFormat("yyyy-MM-dd HH:mm:ss");
System.out.println(fmt.format(cal.getTime()));
// Output "2017-02-28 11:35:01"


/* Go */
time.Now().format("2006-01-02 15:04:05")
// Output "2017-02-28 11:35:01"