$ruby main.rb
"format_str=yyyymmdd-nnnnn, num=100, date=2020-01-01"
{:date=>{:year=>true, :month=>true, :day=>true}, :num=>true}
"20200101-00100"
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November 24, 2020 15:16
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#!/usr/bin/env ruby | |
require 'date' | |
def parse(format_str) | |
result = { | |
date: {}, | |
num: false, | |
} | |
result[:date][:year] = true if format_str.include?('yyyy') | |
result[:date][:month] = true if format_str.include?('mm') | |
result[:date][:day] = true if format_str.include?('dd') | |
if m = format_str.match(/n+/) | |
result[:num] = true | |
end | |
result | |
end | |
def format(format_str, num: nil, date: nil) | |
result = format_str | |
if date | |
result.gsub!('yyyy', date.strftime('%Y')) | |
result.gsub!('mm', date.strftime('%m')) | |
result.gsub!('dd', date.strftime('%d')) | |
end | |
if m = result.match(/n+/) | |
len = m[0].size | |
result.gsub!(m[0], sprintf("%0#{len}d", num)) | |
end | |
result | |
end | |
def main | |
format_str = 'yyyymmdd-nnnnn' | |
num = 100 | |
date = Date.new(2020, 1, 1) | |
pp "format_str=#{format_str}, num=#{num}, date=#{date}" | |
pp parse(format_str) | |
pp format(format_str, num: num, date: date) | |
end | |
main |
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