HARDCODE UFO

2019年3月18日星期一

My Python Cheat Sheet

Strings

x = 'a'
x.isalpha()
>>> True
x.isdigit()
>>> False

eval( ' 1*2+3 ' )
>>> 5

ord()
>>>ord('a') 97 >>> ord('b') 98 >>> ord('c') 99

Turn string to lower/upper case
s.lower()
s.upper()
---------------------------------------------------
Numbers

import sys
sys.maxsize # get a large number
-sys.maxsize - 1

cmp(a, b)
-1 if a<b
0 if a=b
1 if a>b

sort by x[0] then by x[1]
temp = sorted(temp, key = lambda x: (x[0], x[1]))

---------------------------------------------------
Lists

sorted(list)
list.sort()

reversed(list)
list.reverse()
list[::-1]

find()
>>> str1 = "this is string example....wow!!!";
>>> str1.find('tri')
9

Counter()
tasks = [A, A, A, B, B, B, B]
d = collections.Counter(tasks)
print(d)
>>> Counter({'A': 3, 'B': 4})

counts = d.values()
print(counts)
>>> dict_values([3, 4])

---------------------------------------------------
Deque
import collections

de = collections.deque([1,2,3])
de.append(4)
de.appendleft(4)
de.pop()
de.popleft()

---------------------------------------------------

Random Library
random.randint(min, max)

pick a random element from a list:
random.choice(list)

pick a random element from a set:
random.sample(set, 1)[0]
random.choice(list(set))

---------------------------------------------------
Binary to decimal
A = int(a, 2)

Decimal to binary
bin(A)

2018年9月11日星期二

Deploying Node+Mongodb+JWT to Heroku

When setting JWT secret in develope or test environment:

config/config.js

var env = process.env.NODE_ENV || 'development'; // for heroku deploy

if (env === 'development' || env === 'test') {

var config = require('./config.json');

var envConfig = config[env];

Object.keys(envConfig).forEach((key) => {

// loops through the env Object to copy the setting values from config.json to process.env

process.env[key] = envConfig[key]

});

}

config/config.json

{

"test": {

"PORT": 3000,

"MONGODB_URI": "mongodb://localhost:27017/ResuMakerTest",

"JWT_SECRET": "qwertyuihjkljklopIdonthavetorememberthis"

},

"development": {

"PORT": 3000,

"MONGODB_URI": "mongodb://localhost:27017/ResuMaker",

"JWT_SECRET": "qwertyuiop123456thisisrandom"

}

}

However, when deploying to Heroku, the JWT secret have to be set by Heroku CLI:

heroku config:set JWT_SECRET=mysecretvalue

We can check if the JWT_SECRET has been properly set up by running heroku config and view all variables.

2018年2月5日星期一

How to copy local file to SSH server using terminal

Go to your local directory

scp project_0 hsiehke@flip.engr.oregonstate.edu:~/CS575

CS 575
g++ -o proj proj.cpp -lm -fopenmp

icpc -o proj5 proj5.cpp -lm -openmp -align -qopt-report=3 -qopt-report-phase=vec -no-vec

-----
CS 519-10

flip $ /nfs/farm/classes/eecs/winter2018/cs519-010/submit hw10 rna.py

2017年10月17日星期二

Setup DB for DeadDrop Project

You can make sure if your mysql is correctly installed by running Chris's Node seminar's mysql project and try putting your name on there.

In the deaddrop project directory, open config/db.json
change the "user" and "password" to match your local settings
(you can view the db.json in the seminar's mysql project as reference)

/usr/local/mysql/bin/mysql --user root -p

in the deaddrop repo, open MySQL DB Setup Script.sql

paste the first line to create database

CREATE DATABASE `deaddrop` /*!40100 DEFAULT CHARACTER SET utf8 */;

In terminal, type this to change the database

use deaddrop

then paste the rest to create table

CREATE TABLE `messages` (

`uuid` int(11) NOT NULL AUTO_INCREMENT,

`message` varchar(300) NOT NULL,

`timestamp` datetime NOT NULL,

`latitude` decimal(13,10) NOT NULL,

`longitude` decimal(13,10) NOT NULL,

PRIMARY KEY (`uuid`)

) ENGINE=InnoDB AUTO_INCREMENT=3 DEFAULT CHARSET=utf8;

Grant user semdemo to use this db

grant all privileges on deaddrop . * to 'semdemo'@'localhost';

run this in the deaddrop repo

sudo npm start dev

and the website will be at localhost:443

阅读更多博文 »

2017年10月14日星期六

Unit Test筆記：如何測試TableView

Using tableViewController

Unit Test筆記：setUp() & tearDown()

為了不讓多個test case撞在一起，
在每個test case的前與後就會加入 setUp() 與 tearDown()

所以在每個 test 之前，如果 DropManager.drops.count 不等於3的話，就會自動重置
並且在 test 結束後清空 DropManager.drops 陣列

舉例來說，

由於DropManager是Singleton

所以如果這兩個test case同時存在的情況

如果沒有 setUp tearDown 的情況下，一次測試，
testAddDrop2 會出現錯誤，DropManager.drops.count 應該等於 5

但有 setUp tearDown 後，就能在兩個test case之間重置 DropManager，使兩個 test case 都能 pass