Principal Software Engineer/Architect, motorcyclist, drummer, and artist
All things computing.
There are times, mostly for logging and debugging, when you have a slice of a given type that you would like to print to a log file or just convert to a CSV of values.
A quick and easy way to convert a slice to a CSV in Golang is to use the json module to Marshal it a JSON encoded array.
package main
import (
"encoding/json"
"fmt"
)
func main() {
ints := []int64{1, 2, 3, Sometimes you are working with a PostgreSQL database with A LOT of tables and looking for tables that contain a sub-string in their name. Following is a query that you can run that will return all of the tables that have the string in their name:
SELECT
table_schema,
table_name
FROM
information_schema.tables
WHERE
table_name LIKE '%<string%'
AND table_schema not in ('information_schema', 'pg_catalog')
AND table_type = 'BASE TABLE'
ORDER BY
table_name, table_schema
;I have just recently started using Earthly and the following is a list of commands that I want to keep track of
Completely clearing the cache: Earthly stores artifacts in docker volumes. If you want to completely flush that data and start fresh run the following
docker stop earthly-buildkitd && \
docker rm earthly-buildkitd && \
docker volume rm earthly-cacheA handful of handy git commands that I don’t use all that often but want to keep track of:
git stash push -m 'message here' -- path/to/fileFirst figure out the id of the stash you want to drop with git stash list, then issue the following command
git stash drop stash@{n}
If you need to change the author of a commit → Continue reading “git Cheat Sheet”
If you would like to join an array of elements with a defined delimiter in Bash there is an easy way to go about it by using printf. Following is an example
#!/bin/bash
declare -a arr=()
for i in `seq 1 5`
do
arr=("${arr[@]}" $i)
done
# Generate a single string joined by a comma. The printf string can contain
# any arbitrary delimiter.
printf -v joined '%s,' "${arr[@]}"
# Print out the string minus the trailing comma
echo Sometimes you are making changes to a dependency in another of your go projects and instead of adding a replace command in the go.mod file you want to update that entry in go.mod to point to a specific commit in the repo.
To do so, all that you need to do is:
go.mod file resides in which you want to If you have to rename a large number of files under Windows it is very tedious to do it one-by-one via the gui. Instead of writing a batch file, Microsoft has a suite of tools called PowerToys. PowerToys installs a utility called PowerRename that will do the job.
I did this under Windows 10, but I imagine that it is the same in Windows 11 based on the documentation on the PowerToys installation page.
Following are a number of my commonly used docker commands for my own reference
Run the following in the same directory in which your Dockerfile resides
docker build -t <image-name:<version.Or you can specify the path to the Dockerfile
docker build . -t <image-name:<version-f /path/to/DockerfileEspecially useful when debugging commands that you will encapsulate in a Docker file, this will enable you to run a base image and then execute → Continue reading “Docker Cheat Sheet”
Some of git’s nomenclature can be confusing, especially since it is context dependent. Following are some TLDR;s for dealing with resolving merge conflicts in different scenarios.
The meaning of --ours vs --theirs can depend on whether you are doing a rebase or a merge.
Assuming that the feature branch is checked out
git merge develop | git rebase develop | |
To keep changes from develop | --theirs | --ours |
To keep changes from feature | --ours | --theirs |
If, during a rebase there → Continue reading “Git Merge Conflict Resolution Cheat Sheet”
kubectl get namespacekubens <namespace-name>kubectl get podskubectl get pods -n <namespace>kubectl delete pod <pod-name>kubectl describe pods <pod-name>kubectl logs <pod-name> -c <init-container-name>