zhangzhhz

python

with open("50M.dat", "wb") as outfile:
    outfile.write(b'\x00' * 50 * 1024 * 1024)
    # outfile.write(bytes(50 * 1024 * 1024))

go

package main

zhangzhhz

#!/usr/bin/env lua

t = { a = 1, b = 2, h = "hello", x = { m = 1, n = "hello world" }, 3,
    y = { "y", z = "hello there", aa = { a1 = 1, a2 = 2, x = "xyz" } },
    bool = { b1 = true, b2 = false, [true] = true, [false] = false },
    [100] = "one hundred", ["hello world"] = 100, f = function() return "Returned from a function" end }

function dump(t, indentLevel)
    local indentLevel = indentLevel or 1
    local str = "{\n"

zhangzhhz

#!/usr/bin/env python3

from string import ascii_lowercase, ascii_uppercase
from random import shuffle
from time import sleep

for letters in [ascii_lowercase, ascii_uppercase]:
    l = list(range(26))
    shuffle(l)
    c_list = [" "]  * 26

zhangzhhz

#!/usr/bin/env python3

from string import ascii_lowercase, ascii_uppercase
from random import shuffle
from time import sleep

for letters in [ascii_lowercase, ascii_uppercase]:
    l = list(range(26))
    shuffle(l)
    c_list = [" "]  * 26

zhangzhhz

Both ^ and ~ themselves mean the parent.

~ followed by a number works the same as putting the same number of ~. For example, my_commit~3 is the same as my_commit~~~ which refers to the 3rd parent of my_commit.

But ^2 only makes sense for a merge commit, i.e., merge_commit^2 means the second parent of the merge_commit, merge_commit^1 is the same as merge_commit^ or merge_commit~ or merge_commit~1.

On the other hand, repetitive ^ is the same as repetitive ~. For example, ~~~ is the same as ^^^, and the same as ~3.

Some examples:

zhangzhhz

NodeJS

// base64 encoding a file
const base64EncodedString = fs.readFileSync(imageFileName).toString('base64');
// saving a base64 encoded image to a file
fs.writeFileSync(imageFileName, Buffer.from(base64EncodedString, 'base64'))

Python

zhangzhhz

Notes from Practical Git for Everyday Professional Use on egghed.io.

git init

Initialize the current local directoy as a git repository locally.

git init --bare will make the local directory a bare repository which will act as a remote respository.

git clone <link>

Clone a remote repository locally. New directory will be created.

zhangzhhz

#!/usr/bin/env python3
'''
You have notes in 3 denominations: two, five and ten.
Write a function `change` which takes in one argument which is the money amount,
and return the combination of the 3 notes using minimum number of notes
that adds up to the given amount.
Return None if it is not able to add up to the amount.
Assume you have infinite supply of notes in all 3 denominations.
Examples:
1: the function should return None

zhangzhhz

https://en.wikipedia.org/wiki/ASCII#Printable_characters

Codes 20 to 7E, known as the printable characters, represent letters, digits, punctuation marks, and a few miscellaneous symbols. There are 95 printable characters in total.

Code 20, the "space" character, denotes the space between words, as produced by the space bar of a keyboard. Since the space character is considered an invisible graphic (rather than a control character) it is listed in the table below instead of in the previous section.

Code 7F corresponds to the non-printable "delete" (DEL) control character and is therefore omitted from this chart; it is covered in the previous section's chart. Earlier versions of ASCII used the up arrow instead of the caret (5E) and the left arrow instead of the underscore (5F).

Javascript:

zhangzhhz

#!/usr/bin/env python3

import os
import sys
import subprocess
import tempfile

f = 'mycerts.pem' if len(sys.argv) == 1 else sys.argv[1]

if os.path.exists(f) and os.path.isfile(f):