Keiichiro Yamamoto keiichiroy

keiichiroy / calculate_jancode_checkdigit.py

Created January 29, 2020 03:09

Calculating JAN/EAN check digit

	from functools import reduce

	string = '456995111617'
	odds = string[1::2]
	evens = string[0::2]

	sum_from_odds = reduce(lambda a,b: int(a)+int(b),odds) * 3
	sum_from_evens = reduce(lambda a,b: int(a)+int(b),evens)

	value_to_minus = str(sum_from_odds + sum_from_evens)[-1]

keiichiroy / persisted_postgresql_using_docker_on_wsl2

Last active November 29, 2019 01:59

Create PostgreSQL persisted environment using Docker

	```bash
	docker run -d --user "$(id -u):$(id -g)" -v /etc/passwd:/etc/passwd:ro -v $(pwd)/data:/var/lib/postgresql/data -p 5432:5432 -e POSTGRES_PASSWORD=postgres postgres:10.10
	```

	```bash
	psql -h localhost -p 5432 -U postgres -W -d postgres
	```

keiichiroy / gist:ddb71327485bf3a0713d35b01ef54e47

Created October 15, 2018 21:24

Talend: tJavaRow code for processing schema columns by its Type (not specifying its column name)

	// using reflection class
	Class outputClass = output_row.getClass();
	Class inputClass = input_row.getClass();
	Field[] targets = outputClass.getFields();

	// loop output_row fields
	for(Field target: targets){

	// Debug: display Type
	// System.out.println(field.getType().getTypeName());