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AndreKR / Dockerfile
Created Aug 5, 2022
Dockerfile COPY cheat sheet
View Dockerfile
# Copies the file into the directory (both are equivalent):
COPY some_file /some_directory/
COPY some_file /some_directory/some_file
# Copies both files into the directory:
COPY some_file another_file /some_directory/
# Copies the contents of the directory (but not the directory itself) into the other directory:
COPY some_directory /other_directory/
View go_webdriver_comparison.go
package main
import (
agwd ""
tbwd ""
sgwd ""
// Helper for sourcegraph/go-selenium
AndreKR /
Created Aug 24, 2017
Vue.js v-model vs. v-bind.sync

Vue.js: v-model vs. v-bind:<propname>.sync

These examples use the expression foo as the data source in the parent.

Prop name Event name
v-model="foo" value by default input by default
v-bind:<propname>.sync="foo" arbitrary update:<propname>


AndreKR /
Created Jul 30, 2021
A simpler Android CountDownTimer
package foo;
import android.os.CountDownTimer;
public class SimpleCountDownTimer {
boolean repeat;
Runnable action;
CountDownTimer c;
View mysql_to_postgresql.txt
To help you with the process of converting a MySQL app to PostgreSQL, I collected a list of differences between MySQL and PostgreSQL (PG).
Important changes:
* Strings are quoted with '...' or with $token$...$token$. Single-quotes are escaped with single-quotes.
* Identifiers are folded to lowercase, unless they are quoted with "..." which makes them case-sensitive
* The max identifier length is 63
* There are some system columns that cannot be used as an identifier (probably not a problem)
* Expressions are evaluated in arbitrary order, so WHERE x > 0 AND y/x > 1.5 can lead to a division by zero and has to be replaced with WHERE CASE WHEN y > 0 THEN y/x > 1.5 ELSE FALSE END
* SELECT CASE WHEN x > 0 THEN x ELSE 1/0 END would still lead to a division by zero because the constant 1/0 is evaluated even before the query starts
AndreKR /
Created Jul 12, 2020
Read a BLE characteristic on Android
import android.bluetooth.BluetoothAdapter;
import android.bluetooth.BluetoothDevice;
import android.bluetooth.BluetoothGatt;
import android.bluetooth.BluetoothGattCallback;
import android.bluetooth.BluetoothGattCharacteristic;
import android.bluetooth.BluetoothGattService;
import android.bluetooth.BluetoothProfile;
AndreKR / logrus.go
Last active Oct 7, 2019
Initializing logrus
View logrus.go
// The state of Go logging libraries is disheartening...
import (
"" // not ansicolor because recommends colorable
log ""
AndreKR / tgit_dmerge.txt
Last active Mar 29, 2019
TortoiseGit + DiffMerge
View tgit_dmerge.txt
"C:\Program Files\SourceGear\Common\DiffMerge\sgdm.exe" -m -t1=%yname -t2=%bname -t3=%tname -result=%merged %mine %base %theirs
AndreKR /
Created Dec 13, 2018
Get all resources in a Kubernetes cluster

kubectl api-resources --verbs=list -o name | xargs -n 1 -t kubectl get --ignore-not-found --all-namespaces

AndreKR / go_release_build.txt
Last active May 20, 2018
Build smaller executables with Go
View go_release_build.txt
go build -gcflags=all=-trimpath=c:\path\to\trim -asmflags=all=-trimpath=c:\path\to\trim -ldflags=all="-s -w"
upx ...