1,
2.
26 May 2022
How to find the files which you have viewed or edited in time order?
Go to the following directory -
~/.vim/view/
Run
$ ls -alht | less
23 May 2022
How to delete all the lines which contain a pattern in vim?
https://vim.fandom.com/wiki/Delete_all_lines_containing_a_pattern
The ex command g is very useful for acting on lines that match a pattern. You can use it with the d command, to delete all lines that contain a particular pattern, or all lines that do not contain a pattern.
For example, to delete all lines containing "profile" (remove the /d to show the lines that the command will delete):
:g/profile/d
More complex patterns can be used, such as deleting all lines that are empty or that contain only whitespace:
:g/^\s*$/d
To delete all lines that do not contain a pattern, use g!, like this command to delete all lines that are not comment lines in a Vim script:
:g!/^\s*"/d
Note that g! is equivalent to v, so you could also do the above with:
:v/^\s*"/d
The next example shows use of \| ("or") to delete all lines except those that contain "error" or "warn" or "fail" (:help pattern):
:v/error\|warn\|fail/d
22 May 2022
How to pass args to a Python program when running it?
To learn how, find the Python Doc/howto/ directory and open the file 'argparse.rst', e.g.
~/Downloads/Python-3.10.0/Doc/howto/argparse.rst
17 May 2022
16 May 2022
15 May 2022
14 May 2022
How to get a list of the members of an email distribution list, and a list of the members of an office 365 team?
Go to office.com > 9 dots > admin > show all > exchange > dashboard_recipients_groups.
Click to select a group, e.g. cics.staff. Click 'Edit' > membership. Ctrl-a Ctrl-c
Ctrl-v in a text editor.
(2) Team
Go to the team, e.g. team_staff. Wait for quite a while, and need repeat scrolling up and down, until all the members are displayed, before mouse-dragging all the members, and Ctrl-c
Ctrl-v in a text editor.
How to read a text file in Python?
https://stackoverflow.com/questions/53919299/python-how-to-properly-use-readline-and-readlines
There are 4 methods.
Method #1
(Iterate lines by referencing the file pointer)
with open(INFILE, 'r', encoding='utf_8') as f:
listOfLines = []
for line in f: # (Type of 'f' is '_io.TextIOWrapper.
# Yet we can use 'for line in'
# for accessing its lines!)
listOfLines.append(line.rstrip()) # rstrip() strips off # newline characters
The above method is the best and fastest way, compared with read(), readline(), readlines(), to access a text file. It occupies the least memory at any time. In addition, you need not handle the end-of-file issue as with readline().
Method #2
(readline())
with open(INFILE, 'r', encoding='utf_8') as f:
listOfLines = []
while True:
if not line:
break
line = f.readline()
listOfLines.append(line.rstrip())
Method #3
(readlines())
with open(INFILE, 'r', encoding='utf_8') as f:
listOfLines = []
for line in f.readlines()
listOfLines.append(line.rstrip())
Method #4
(read())
with open(INFILE, 'r', encoding='utf_8') as f:
strOfWhole = f.read()
(The END)
13 May 2022
How to export a list of members of an email group from Office 365?
https://answers.microsoft.com/en-us/msoffice/forum/all/how-do-i-really-export-distribution-list-members/efe355ff-cc64-4235-8615-364bbff75382
Based on my tests and researches, it is not feasible to export distribution list members using UI interface. We can only export the members via Windows PowerShell. To do that, the steps are as follows:
1. Open Windows PowerShell and connect to Exchange Online PowerShell. Here are the commands:
Install-Module ExchangeOnlineManagement (Enter Y to install the module)
Connect-ExchangeOnline (Sign in using admin account and password)
2. Then run the following script to get a csv file about Distribution list.
$Groups = Get-DistributionGroup
$Groups | ForEach-Object {
$group = $_.Name
$members = ''
Get-DistributionGroupMember $group | ForEach-Object {
$members=$_.Name
New-Object -TypeName PSObject -Property @{
GroupName = $group
Members = $members
EmailAddress = $_.PrimarySMTPAddress
}}
} | Export-CSV "C:\DistributionGroupMember.csv" -NoTypeInformation -Encoding UTF8
Here is a screenshot about the result I got:
10 May 2022
How to install vim plugin from github?
e.g.1 install ctrlp from github
Clone the plugin from the git repository
To clone from github:
git clone https://github.com/kien/ctrlp.vim.git ~/.vim/bundle/ctrlp.vim
2
Update your vimrc
Add the following to your vimrc file:
set runtimepath^=~/.vim/bundle/ctrlp.vim
To edit vimrc, type:
vim ~/.vimrc
3
Restart vim
============================
e.g. 2 install airline from github
git clone https://github.com/bling/vim-airline ~/.vim/bundle/vim-airline
Put the following line into ~/.vimrc
set funtimepath^=~/.vim/bundle/vim-airline
I got :help airline to work with this command:
:helptags ~/.vim/bundle/vim-airline/doc
Like you, now the help-page displays when I type :help airline.
To add airline and the buffer list, install airline, and then just add this to your .vimrc:
" Enable the list of buffers
let g:airline#extensions#tabline#enabled = 1
" Show just the filename
let g:airline#extensions#tabline#fnamemod = ':t'
Next I needed to replace the tab shortcuts that I’d no longer be using. I did this by adding these to my .vimrc as well:
" This allows buffers to be hidden if you've modified a buffer.
" This is almost a must if you wish to use buffers in this way.
set hidden
" To open a new empty buffer
" This replaces :tabnew which I used to bind to this mapping
nmap <leader>T :enew<cr>
" Move to the next buffer
nmap <leader>l :bnext<CR>
" Move to the previous buffer
nmap <leader>h :bprevious<CR>
" Close the current buffer and move to the previous one
" This replicates the idea of closing a tab
nmap <leader>bq :bp <BAR> bd #<CR>
" Show all open buffers and their status
nmap <leader>bl :ls<CR>
These settings gave me a hybrid approach to how I expected tabs to work in Vim yet it still gave me the same power that comes from understanding and using buffers.
How to split a window and let the new window be on the right or below?
:bel(owright) {command}
e.g.
:bel sp {filename}
:bel vs {filename}
:bel new {filename}
Understanding buffers, windows and tabs in vim
https://joshldavis.com/2014/04/05/vim-tab-madness-buffers-vs-tabs/
08 May 2022
How to show vertical line in Vim?
https://stackoverflow.com/questions/1919028/how-to-show-vertical-line-to-wrap-the-line-in-vim/3787678#3787678
to display vertical lines
:set colorcolumn=5,9,13,17
Not to display vertical lines
:set colorcolumn=0How to install and use a vim plugin manager? How to install a vim plugin?
How to install and use a vim plugin manager? How to install a vim plugin?
In the above readme file, it asks you to reload .vimrc
How to reload .vimrc?
How to split window and open terminal in vim?
https://dev.to/mr_destructive/vim-terminal-integration-4pfp
^w v
To split window vertically. (the same file is opened in the new split window.)
^w l
To go to the newly split windows on the right
:term
To open a terminal. (The window on the right split horizontally, and the terminal window is on the top.)
^w j
To go to the split window below the terminal window
^w c
To close the window below the terminal window
06 May 2022
05 May 2022
How to capitalise selected words in vim
https://stackoverflow.com/questions/17440659/capitalize-first-letter-of-each-word-in-a-selection-using-vim
\<matches the start of a word.matches the first character of a word\utells Vim to uppercase the following character in the substitution string(&)&means substitute whatever was matched on the left-hand sidegmeans substitute all matches, not only the first
=======================================================
:help case says:
To turn one line into title caps, make every first letter of a word
uppercase:
: s/\v<(.)(\w*)/\u\1\L\2/g
Explanation:
: # Enter ex command line mode.
space # The space after the colon means that there is no
# address range i.e. line,line or % for entire
# file.
s/pattern/result/g # The overall search and replace command uses
# forward slashes. The g means to apply the
# change to every thing on the line. If there
# g is missing, then change just the first match
# is changed.
The pattern portion has this meaning:
\v # Means to enter very magic mode.
< # Find the beginning of a word boundary.
(.) # The first () construct is a capture group.
# Inside the () a single ., dot, means match any
# character.
(\w*) # The second () capture group contains \w*. This
# means find one or more word characters. \w* is
# shorthand for [a-zA-Z0-9_].
The result or replacement portion has this meaning:
\u # Means to uppercase the following character.
\1 # Each () capture group is assigned a number
# from 1 to 9. \1 or back slash one says use what
# I captured in the first capture group.
\L # Means to lowercase all the following characters.
\2 # Use the second capture group
Result:
ROPER STATE PARK
Roper State Park04 May 2022
02 May 2022
Input CSV File:
country, population
Usa, 1273
Usa, 4343
Usa, 1240
Uk, 7879
Uk, 3224
Uk, 4342
Tr, 6565
Tr, 7889
Tr, 1980
========================import csv
index = {}
with open('/tmp/data.csv') as f:
cr = csv.reader(f)
next(cr) # skip header row
for row in cr:
index.setdefault(row[0], []).append(int(row[1]))
print("['country', 'avgPop']")
for c, v in index.items():
print("['{}', '{}']".format(c, int(sum(v) / len(v))))
Result:
['country', 'avgPop']
['Usa', '2285']
['Uk', '5148']
['Tr', '5478']01 May 2022
How to slice a number of columns from a 2-dimensional list in Python?
https://www.codegrepper.com/code-examples/python/python+multiaxis+slicing
# Basic syntax:
[your_list[i][start_col : end_col] for i in range(start_row, end_row)]
# Example usage:
your_list = [[1, 2, 3, 4, 5],[6, 7, 8, 9, 10],[11, 12, 13, 14, 15]]
# obtain rows 0-1 (inclusive) and cols 2-3 (inclusive)
[your_list[i][2:4] for i in range(0,2)]
--> [[3, 4], [8, 9]]
How to pick up a single column from a 2-dimensional list in Python?
https://stackoverflow.com/questions/30062429/how-to-get-every-first-element-in-2-dimensional-list
a = [[4.0, 4, 4.0], [3.0, 3, 3.6], [3.5, 6, 4.8]]You can get the index [0] from each element in a list comprehension
>>> [i[0] for i in a]
[4.0, 3.0, 3.5]
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