Why?
This:
.action {
@extend .ml-3;
}
### extract videos as mp3 files | |
youtube-dl -x --audio-format mp3 <video link> | |
### get highest resolution audio & video | |
To download a video, you type the URL after the command like so: | |
youtube-dl <video link> | |
To select the video quality, first use the -F option to list the available formats, here’s an example, |
package service | |
var CalculateSum = calculateSum |
Why?
This:
.action {
@extend .ml-3;
}
After automatically updating Postgres to 10.0 via Homebrew, the pg_ctl start command didn't work. | |
The error was "The data directory was initialized by PostgreSQL version 9.6, which is not compatible with this version 10.0." | |
Database files have to be updated before starting the server, here are the steps that had to be followed: | |
# need to have both 9.6.x and latest 10.0 installed, and keep 10.0 as default | |
brew unlink postgresql | |
brew install postgresql@9.6 | |
brew unlink postgresql@9.6 | |
brew link postgresql |
DUMP | |
// pod-name name of the postgres pod | |
// postgres-user database user that is able to access the database | |
// database-name name of the database | |
kubectl exec [pod-name] -- bash -c "pg_dump -U [postgres-user] [database-name]" > database.sql | |
RESTORE | |
// pod-name name of the postgres pod | |
// postgres-user database user that is able to access the database | |
// database-name name of the database |
If you are getting this in gdb on macOS while trying to run a program:
Unable to find Mach task port for process-id 57573: (os/kern) failure (0x5).
(please check gdb is codesigned - see taskgated(8))
gdbc
)# Assumes the database container is named 'db' | |
DOCKER_DB_NAME="$(docker-compose ps -q db)" | |
DB_HOSTNAME=db | |
DB_USER=postgres | |
LOCAL_DUMP_PATH="path/to/local.dump" | |
docker-compose up -d db | |
docker exec -i "${DOCKER_DB_NAME}" pg_restore -C --clean --no-acl --no-owner -U "${DB_USER}" -d "${DB_HOSTNAME}" < "${LOCAL_DUMP_PATH}" | |
docker-compose stop db |
SPC s c remove highlight | |
**** Files manipulations key bindings | |
Files manipulation commands (start with ~f~): | |
| Key Binding | Description | | |
|-------------+----------------------------------------------------------------| | |
| ~SPC f c~ | copy current file to a different location | | |
| ~SPC f C d~ | convert file from unix to dos encoding | | |
| ~SPC f C u~ | convert file from dos to unix encoding | |
When developing a program in Ruby, you may sometimes encounter a memory leak. For a while now, Ruby has a facility to gather information about what objects are laying around: ObjectSpace.
There are several approaches one can take to debug a leak. This discusses a time-based approach, where a full memory dump is generated every, say, 5 minutes, during a time that the memory leak is showing up. Afterwards, one can look at all the objects, and find out which ones are staying around, causing the
# for redirecting hhtp traffic to https version of the site | |
server { | |
listen 80; | |
server_name example.com; | |
return 301 https://$server_name$request_uri; | |
} | |
# for redirecting to non-www version of the site | |
server { | |
listen 80; |