TIL - til.diegoallen.me

All notes are stored in markdown in this github repo.

Filter by category:

all bash celery chrome cli conceptual css django docker git go http js markdown node postgresql python react sql sqlalchemy sqlite ssh tmux typescript vim vscode

js Check dependencies and their versions in a node project - 2025-05-31
js Array.prototype.at get the element at a specified index. - 2025-05-23
sql Escape single quotes in a SQL query - 2025-05-19
react useMemo hook - 2025-05-10
sqlalchemy Log SQL to stdout - 2025-05-03
python datetime.replace - 2025-05-03
postgresql Select a random row - 2025-04-22
http Use a file to specify the http payload with curl - 2025-04-13
http Skip certificate verification for https in curl - 2025-04-13
tmux Moving panes in tmux - 2025-03-26
postgresql Get the postgres version - 2025-03-26
postgresql List all values of a Postgres enum - 2025-03-24
postgresql Useful queries to check existing connections - 2025-03-18
typescript ! operator in typescript - 2025-01-08
js Array.prototype.flatMap - 2024-12-30
js Array.prototype.flat to flatten nested arrays. - 2024-12-30
cli networkQuality tool in macos - 2024-12-26
js Use %c to apply styling to console.log output - 2024-11-27
js console.groupCollapsed function - 2024-11-21
django How to keep the database from the previous test run with pytest-django - 2024-11-18
http Check Latency with curl - 2024-11-18
chrome Copy Property Path Option in Chrome DevTools - 2024-11-18
js JavaScript console.dir Function - 2024-11-18
postgresql Dump and restore PostgreSQL databases - 2024-10-16
docker docker compose up can be used to execute only one service - 2024-10-16
postgresql Use COPY to export to CSV - 2024-10-12
python The -u cli flag in Python - 2024-09-28
python re.DOTALL flag in python regular expressions - 2024-09-28
python %history magic function in ipython - 2024-09-28
git Applying a stash without removing it from the list - 2024-09-14
cli alias prints all defined aliases - 2024-09-14
django Use override_settings as a context manager - 2024-08-17
js Escape sequence to add emojis to javascript strings - 2024-08-10
python Escape sequence to use emojis in Python strings - 2024-08-10
python CPU profiling with cProfile - 2024-07-31
docker Docker compose watch - 2024-07-21
docker Using YAML anchors and aliases in docker compose files - 2024-07-20
docker Extensions in the compose file - 2024-07-20
go Doubly Linked List in Go - 2024-07-12
docker Port forwarding in docker run - 2024-07-11
docker Setting environment variables in a container with docker run - 2024-07-11
python str.isnumeric method to check if all characters are numeric - 2024-06-21
js Get the data attributes of a DOM element with javascript - 2024-06-21
go utf8.RuneCountInString utility function to count runes in a string. - 2024-06-06
python Using functools.cache to memoize functions - 2024-06-05
css Add style rules for dark mode - 2024-06-01
python File copy functions in shutil - 2024-06-01
tmux Resizing panes in tmux - 2024-05-24
bash * in shell globbing does not match hidden files - 2024-05-23
node Uninstalling packages and dependencies - 2024-05-09
go strings.Repeat in go - 2024-04-30
python str.splitlines - 2024-04-30
go slices.Reverse - 2024-04-30
docker Check volume size in docker - 2024-04-22
go slices.Contains - 2024-04-18
http Tools to test HTTP clients - 2024-04-12
docker docker compose restart - 2024-04-12
docker docker compose exec - 2024-04-12
python types.SimpleNamespace - 2024-04-11
python operator.attrgetter - 2024-04-11
django Avoid autogenerated varchar_pattern_ops indices created when using db_index=True or unique=True - 2024-04-11
python Python stdlib functions to calculate GCD (greatest common divisor) and LCM (lowest common multiple) - 2024-03-27
python collections.Counter's most_common method - 2024-03-21
chrome Cmd + Shift + A (Ctrl + Shift + A in windows) - 2024-03-21
go log.Fatalln and log.Fatalf - 2024-03-20
cli tr command in linux - 2024-03-16
python slice built-in object - 2024-03-09
python bisect module - 2024-03-08
cli What does real, user and sys from the output of time mean? - 2024-02-28
git Search codebase history using git log -S - 2024-02-28
git List tags and see the changes in the commit a tag points to - 2024-02-13
js Optional chaining with methods in JS - 2024-02-03
js String.prototype.concat - 2024-02-03
js document.activeElement - 2024-02-03
typescript Using the as operator for mocks in jest tests - 2024-02-03
js Array.isArray - 2024-02-01
python Using glob.glob to find files - 2024-01-04
sqlite Create a sqlite database - 2023-12-30
vscode Customize directories where VSCode search for virtualenvs - 2023-12-29
python typing.NamedTuple - 2023-12-20
python pytest --trace - 2023-12-20
git Stash individual files - 2023-12-11
go Use reflect.Typeof get the type of a variable - 2023-12-10
go Using log.Fatal - 2023-12-10
go defer - 2023-12-10
python Customize iPython shell - 2023-12-08
bash Multi line comments in a bash script - 2023-12-04
python Using unittest.mock.patch as a class decorator - 2023-12-03
tmux Show pane numbers - 2023-12-03
git git apply to apply a patch - 2023-12-03
python The end optional kwarg of the print built-in function. - 2023-11-12
python How to reference values using hex in strings - 2023-11-12
react useCallback - 2023-09-26
react memo - 2023-09-26
python Debug f-strings - 2023-08-03
django python manage.py sqlmigrate - 2023-07-26
python default kwarg in max builtin - 2023-07-26
vim Print the content of registers - 2023-07-04
chrome Replay an AJAX request in Chrome - 2023-07-04
js done function in Jest tests - 2023-07-04
react screen.logTestingPlaygroundURL() to debug queries when using testing-library - 2023-06-09
js React strict mode - 2023-06-09
typescript Pick generic - 2023-06-02
postgresql Identify long running queries and kill them. - 2023-05-31
celery Debugging celery tasks - 2023-05-22
js The comma operator (,) - 2023-04-27
git Pull and resolve conflicts by using changes from the origin. - 2023-04-13
django Check the database connection settings from the Django shell - 2023-03-24
tmux List clients connected to a tmux session. - 2023-03-08
vim Check what Python interpreter vim is using. - 2023-03-08
python Check what interpreter is running from a Python REPL or script - 2023-03-08
tmux Disconnect sessions from tmux - 2023-03-03
markdown Nested lists in markdown - 2023-02-21
js Destructure and renaming in ES6 - 2023-02-03
django Check Django version from the command line - 2023-01-20
tmux Tmux scrolling - 2023-01-18
bash Difference between single and double quotes in bash. - 2023-01-16
bash For loops in bash - 2023-01-16
js Nullish coalescing operator (??) - 2023-01-07
git How do I git rebase the first commit? - 2023-01-06
git Fixing commits with git commit --fixup and git rebase -i --autosquash - 2023-01-06
python Pretty print JSON - 2022-12-31
http Content-Type HTTP header - 2022-12-31
http Accept HTTP header - 2022-12-31
python Using multiple pytest.mark.parametrize decorators - 2022-12-29
cli Edit cli command in $EDITOR - 2022-12-24
docker Execute command in running container - 2022-12-23
python Poetry Cheatsheet - 2022-12-21
python What does / represent in the argument list of a function - 2022-12-13
python What does ... mean in python? - 2022-12-13
python dict.setdefault - 2022-12-12
python What does an asterisk represent in the argument list of a function - 2022-12-12
cli Lsof to get the process listening on a given port - 2022-12-11
python itertools.count to create an iterator that returns an infinite sequence of numbers - 2022-11-30
git Show changes in staged files. - 2022-11-26
git To amend the previous commit and keep the same log message, run: - 2022-11-22
css Pseudo-elements - 2022-11-16
css Pseudo-classes - 2022-11-16
git Rebase when pulling - 2022-11-14
django Django performance debugging tools - 2022-11-14
python Dictionary view objects - 2022-11-14
vscode Keyboard shortcut to resize built-in VSCode's terminal - 2022-11-08
tmux Reload tmux configuration - 2022-11-03
node Check what global packages has been installed and where. - 2022-10-30
python itertools.product to calculate the cartesian products of input iterables - 2022-10-18
js JS encodeURI and encodeURIComponent functions - 2022-09-27
cli w command - 2022-08-26
js Tagged Template Literals - 2022-05-31
react useEffect react hook - 2022-05-24
js JS Promises. - 2022-05-15
chrome Throttle network connection in Chrome - 2022-04-21
git Rename the current branch. - 2022-03-11
git Check what's stashed and the changes they introduce. - 2022-03-11
ssh Disconnecting from unresponsive connection - 2022-03-11
tmux Reconciling Tmux and SSH Agent Forwarding. - 2021-12-21
git Multiple SSH Keys for different Github Accounts - 2021-12-20
ssh SSH Agent forwarding - 2021-12-16
git Remove everything from the staging area. - 2021-11-10
js Debugging jest tests with breakpoints. - 2021-11-10
js Computed property names - 2021-11-10
git Adding changes by hunk to the staging area. - 2021-10-01
js JS console.count() and console.countReset() functions - 2021-09-30
js ** operator - 2021-06-21
react React Fragments - 2021-05-26
docker Debugging with ipdb in a docker-compose environment - 2021-05-13
ssh Execute command in a remote machine via ssh - 2021-03-13
bash Obtain the definition of an alias - 2021-03-13
bash Bash Special Variables - 2021-02-17
conceptual Concurrency and Parallelism - 2020-01-10