c02y

find the files containing the obsolete: 
such as assoc:
find ~/.emacs.d/ -name "*.el" -exec grep -H "(require 'assoc)" {} \;


# for the differences of cscope ctags, etags, global(gtags, ggtags..)...:
# https://github.com/OpenGrok/OpenGrok/wiki/Comparison-with-Similar-Tools

# etags for small c;cscope for big project

c02y

• Docker ** Prepare docker *** install docker package *** start and enable service
  • sudo systemctl start docker.service
  • sudo systemctl enable docker.service ** add permission and group
  • sudo usermod -aG docker $USER ** reboot your computer ** check if docker works

c02y

https://unix.stackexchange.com/a/536056/22322

To get Auto-Resize Guest Display working you have to use 'VBoxVGA'

    Stop VM if installed and running
    Choose in VM Setting: Display > Screen > Graphics Controller > 'VBoxVGA'
    Save
    Start VM with Manjaro - Screen goes black.
    hit CTRL+ALT+F2 to enter tty2
    logon

c02y

Sources:

• https://www.youtube.com/watch?v=QMBE5Kxb8Bg
• https://www.youtube.com/watch?v=a00wbjy2vns
• https://www.youtube.com/watch?v=jLJO-PKyDAk

1. Burn the ISO into USB drive if installing it into drive directly

• dd if=archlinux.iso of=/dev/sda bs=4M status=progress && sync

2. Install libvirt ovmf packages and reboot if installing it into KVM NOTE: ovmf package and reboot step ensure that boot from UEFI instead of BIOS, otherwise, it would fail during the process when you try to grub-install (install bootloader)

• choose Fireware of "UEFI x86_84: ... OVMF_CODE.fd" from Overview in VM details of KVM

c02y

* Create tig appimage
** get tig src file zip or using git into ~/public/tig
** compile
   - make
   - fix the dependencies
** generate the appimage file
   - download linuxdeploy appimage and make it executable
   - write the right tig.desktop and log tig.png, the logo can be empty tig.svg file
   - ./linuxdeploy.appimage -e ./src/tig -i ./tig.png -d ./tig.desktop --appdir AppDir --output appimage
	 + NOTE: in docker, you may unable to run appimage directly

c02y

# 141. Linked List Cycle (Easy)
# https://leetcode-cn.com/problems/linked-list-cycle/description/

# Definition for singly-linked list.
class ListNode:
    def __init__(self, x):
        self.val = x
        self.next = None

class Solution:

c02y

# 88. Merge Sorted Array (Easy)
# https://leetcode-cn.com/problems/merge-sorted-array/description/
from typing import List


class Solution:
    def merge(self, nums1: List[int], m: int, nums2: List[int], n: int) -> None:
        """
        Do not return anything, modify nums1 in-place instead.
        """

c02y

# 680. Valid Palindrome II (Easy)
# https://leetcode-cn.com/problems/valid-palindrome-ii/description/
class Solution:
    def validPalindrome(self, s):
        if s == s[::-1]:
            return True
        l, r = 0, len(s) - 1
        while l < r:
            if s[l] == s[r]:
                l, r = l + 1, r - 1

c02y

# https://cyc2018.github.io/CS-Notes/#/notes/32.1%20%E4%BB%8E%E4%B8%8A%E5%BE%80%E4%B8%8B%E6%89%93%E5%8D%B0%E4%BA%8C%E5%8F%89%E6%A0%91

class Node:
    def __init__(self, val=0):
        self.val = val
        self.left = None
        self.right = None

class TreeNodes:
    def __init__(self):

c02y

#!/usr/bin/env python3
# https://cyc2018.github.io/CS-Notes/#/notes/29.%20%E9%A1%BA%E6%97%B6%E9%92%88%E6%89%93%E5%8D%B0%E7%9F%A9%E9%98%B5

class Solution:
    def printMatrix(self, matrix):
        res = []
        while matrix:
            res += matrix.pop(0)
            if matrix and matrix[0]:
                for row in matrix: