All things learnt
Sorted chronologically.
April 2022
March 2022
- How to join an array in Bash on
- Docker for Mac stores all containers and images in a single disk image on
February 2022
-
How to inspect and clear Python’s
functools.lru_cacheon - How to get Vale to work with Vim’s Ale plugin on
-
How to use
markdownlintoutput in Vim’s quickfix list on -
About Factory Boy’s
SelfAttributeclass on - You can search for Loggly mapping conflicts on
-
About Github’s
involves:$usernamesearch filter on - You can’t use Django’s generic foreign key field with objects stored in a separate database on
January 2022
December 2021
-
About Django’s
setupmethod for generic view classes on - How to list the mounts of a running Docker container on
November 2021
-
About Bash’s
$SECONDSshell variable on - That Vim can transform replacement values when substituting on
- How to continue a Git rebase and skip editing the commit message on
- That AWS Aurora clusters have two types of storage on
-
How to use
aws-mfa-v2to avoid entering so many MFA tokens on -
About a gotcha with
psycopg2’s autocommit handling on
October 2021
- How to find the files from a commit that deleted a given pattern on
-
Python’s
envparselibrary has counter-intuitive boolean casting on -
About Git’s
diff.relativeconfig option on - How to effectively scan files using an iPhone on
- How to delete all buffers in Vim on
September 2021
- Factory boy can be used to build dicts on
- Django settings prefixed with an underscore are private on
- How to reset an SSH session on
- How to easily copy annotated screenshots to the clipboard on macOS on
- The names for macOS keyboard meta-characters on
-
About
git merge-baseon
August 2021
July 2021
- Django doesn’t flush caches between tests on
- How Django’s management commands need to be type hinted on
- File-level flake8 comments ignore all errors on
- Git aliases that run an external command are run from the repository root on
- That Pytest’s “keyword expression” filtering supports Python conditionals on
-
That FreezeGun doesn’t work with Pytest fixtures (unless you use
pytest-freezegun) on
June 2021
- About Chrome’s named windows on
-
About
mypy’s unreachable code functionality on -
About
jq’s--slurpoption on -
About
mypy’sreveal_typeandreveal_localsfunctions on -
That
mypyonly type-checks functions that have at least one type annotation on -
About
git log -Gon
May 2021
-
About the
:ALEInfocommand on -
About Ubuntu’s
alertBash alias on - About Vim’s semi-colon search offset on
- The ISO-3166 codes for the United Kingdon are inaccurate on
- That Vim’s uppercase marks are global and persistent on
April 2021
- Sensitive Terraform Cloud variables are included in Sentinel mocks on
- The correct sequence of SQL statements for dropping a role on
-
Python’s
csv.writerfunction defaults to Windows line endings on -
You can use
shufto take random samples of lines on
March 2021
-
That
vim-polyglotconflicts with Hub when creating pull requests on -
About
git-absorbon - JSON is valid YAML on
- How to convert SSH2 public keys to OpenSSH format on
-
How to include the date in
git reflogoutput on -
About
xargs -ton - What the sections of the Unix manual are on
- About delta, a viewer for Git and diff output on
- You can have class-scoped autouse pytest fixtures on
- That software can be “free as in mattress” on
-
systemd sends SIGKILL signals after waiting for
TimeoutStopSecseconds on - iTerm2’s “Cursor boost” feature will cause everything to appear dimmed on
-
pdbpphas a useful ‘sticky’ mode on - systemd timers can be stopped on
- You can use Git log to view the evolution of a function on
-
To prefer
dateutiloverpytzon - Pytest doesn’t play nicely with ipdb on
February 2021
- Chrome has a flags page for enabling experimental features on
-
How to use custom functions with
:cdoon -
The order of permissions matters with
chmodon -
About Github’s
@mesearch term on - Recruiters talk about T-shaped leaders on
January 2021
- Virgin Media’s “Web Safe” product uses DNS on
- How to scroll horizontally with a mouse on
- You can take screenshots with Chrome DevTools on
- You can arbitrarily chain Python comparison operations on
- How to pipe an argument list into Vim on
- How to copy the current filepath to the system clipboard in Vim on
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How to search for fixed strings with
grepandripgrepon - How to easily disable a CircleCI workflow on
- BBC Sounds only works on Alexa if the language setting is UK English on
- How temporary files are removed on MacOS on
December 2020
-
You can define custom file-type filters in
ripgrepon - How to enable Docker BuildKit in MacOS Docker Desktop on
-
You can specify the file-type for
baton -
About
envsubston - How to add project-specific Vim settings on
-
You can stack
pytest’sparametrizedecorators on - About YAML’s node anchors and aliases on
- You can label parameterized fixtures with pytest on
- Universal Ctags can index more things than I realised on
-
A better way of configuring
mypyon - How to spell-check markdown repos on CircleCI on
-
How to set per-project
ripgrepandfzfexclude rules on - Vim-markdown has some useful commands on
- GSuite’s “Groups Admin” role can read any group email on
November 2020
- How to run Jekyll in a Docker container on
-
About how to use
keywordprgeffectively on -
How to configure
ctagsto parse Terraform files on - You can easily share 1Password items via a link on
- You can convert a Slack group direct message chat into a private channel on
- How to use Bandit with Vim’s quickfix list on
- Exuberant-ctags has been superceded by Universal-ctags on
-
About
columnon - You can hide night-time hours in Google calendar on
-
You can run
:grepwithout using parent shell process on -
There’s a
QuickFixCmdPostevent in Vim on
October 2020
- You can jump to previous quickfix lists in Vim on
- How to embed markdown content in a Github code block on
- You can create QR codes for WiFi networks on
-
fdhas an option for searching filepaths on -
datetime.datetimeis a subclass ofdatetime.dateon - The keyboard shortcut for grabbing a MFA code in 1PW on
- How to use AWS profiles that require MFA on
- About the difference between minimising and hiding windows in MacOS on
-
About
readonlyBash variables on -
About
shellcheckon -
About
pip-licenseson - About Bash’s DEBUG signal on
- How to resolve Git rebase conflicts on renamed files on
- There is a “Bongcloud” chess opening on
September 2020
-
How to use
xargswithprintfon - AWS ASGs have an ‘instance refresh’ feature on
- The MacOS keybinds for en- and em-dashes on
- How to read from one buffer to another in Vim on
- SSH config supports multiple host patterns in one block on
- There’s a Chrome extension for switching AWS IAM roles on
- YAML has several string-parsing gotchas on
-
Javascript’s unary
+operator castsnullto zero on - How to count lines of code in a Git repo for a given commit on
-
About Vim’s
:helpgrepcommand on - Vim recommends using Emacs-style key bindings in command mode on
- How to conditionally include items in a Terraform list on
-
You can change the font in Slack with
/slackfont $fonton - You can display the typed text in Alfred in a huge typeface on
- Python 3.7 supports postponed evaluation of annotations on
- Vim doesn’t create the persistent undo folder automatically on
-
How to use type annotations with Python’s
csvmodule on - How to configure Alfred’s Bear workflow to open notes in the main window on
August 2020
- About better YAML file folding in Vim on
- OpenDNS provide free porn-blocking DNS servers on
- AWS Availability Zones have counter-intuitive IDs on
- You can rate-limit issues using a Sentry DSN on
- How to list pages with matching tag in Hugo on
-
About
:help macvimon -
About Vim’s
:diffthiscommand on - About the stationery pad feature in Finder on
-
About
pngcrushon - Asana has some magic search terms on
- You can have SASS asset pipelines in Hugo on
- About text fragments on
July 2020
- Renaming a Terraform module is dangerous on
-
Where authentication for the
ubuntuuser on a EC2 instance is defined on - About the phrase “Parking downhill” on
-
About the MacOS
screencaptureutility on - About Quitter on
- About Alfred’s snippet collections on
- About Alfred’s clipboard history feature on
-
About Twitter’s
min_favessearch filter on