bash to resolve dependencies

August 13, 2020August 13, 2020 by Tom

#!/bin/bash

declare -A USE_MAP
declare -a ENABLES

# export_name dependency dependecy dependency...
USE_MAP['HBASE']='USE_HBASE HCATALOG HUE'
USE_MAP['PIG']='USE_PIG'
USE_MAP['HUE']='USE_HUE'
USE_MAP['HCATALOG']='USE_HCATALOG'
USE_MAP['PRESTO']='USE_PRESTO HCATALOG'
ENABLES=()

function use() {
  local dep=(${USE_MAP["$1"]})
  ENABLES+=(${dep[0]})
  dep=("${dep[@]:1}")
  if [ ! -z "$dep" ]; then
    for item in ${dep[@]}; do
      use $item
    done
  fi
}

function export_enabled() {
  sorted_use=($(echo "${ENABLES[@]}" | tr ' ' '\n' | sort -u | tr '\n' ' '))
  for item in ${sorted_use[@]}; do
    echo "export $item";
  done
}

use HBASE
export_enabled

------

$ bash resolve.sh
export USE_HBASE
export USE_HCATALOG
export USE_HUE

#!/bin/bash

declare -A USE_MAP

declare -a ENABLES

# export_name dependency dependecy dependency...

USE_MAP['HBASE']='USE_HBASE HCATALOG HUE'

USE_MAP['PIG']='USE_PIG'

USE_MAP['HUE']='USE_HUE'

USE_MAP['HCATALOG']='USE_HCATALOG'

USE_MAP['PRESTO']='USE_PRESTO HCATALOG'

ENABLES=()

function use() {

local dep=(${USE_MAP["$1"]})

ENABLES+=(${dep[0]})

dep=("${dep[@]:1}")

if [ ! -z "$dep" ]; then

for item in ${dep[@]}; do

use $item

done

}

function export_enabled() {

sorted_use=($(echo "${ENABLES[@]}" | tr ' ' '\n' | sort -u | tr '\n' ' '))

for item in ${sorted_use[@]}; do

echo "export $item";

done

}

use HBASE

export_enabled

------

$ bash resolve.sh

export USE_HBASE

export USE_HCATALOG

export USE_HUE

Print simple x*x table in ruby

February 4, 2013February 16, 2013 by Tom

I’ve needed to print simple table as

1  2  3  5  7
2  4  6 10 14
3  6  9 15 21
5 10 15 25 35
7 14 21 35 49

1 2 3 5 7

2 4 6 10 14

3 6 9 15 21

5 10 15 25 35

7 14 21 35 49

as you can see, x = y, cell in table = x*y (x*x to be exact)

primes = [2, 3, 5, 7]
primes = [1] + primes # we need that to print x/y axis
puts primes.map{|i| primes.map{|a| a*i}}.map{|i| ['%4i']*primes.length*' '%i}

primes = [2, 3, 5, 7]

primes = [1] + primes # we need that to print x/y axis

puts primes.map{|i| primes.map{|a| a*i}}.map{|i| ['%4i']*primes.length*' '%i}

Calculate prime numbers

February 4, 2013February 17, 2013 by Tom

Tried simple Sieve of Eratosthenes in Ruby …

class MyPrime

  attr_reader :primes # there we can read then

  # compute prime numbers up to limit, default is 20
  def initialize(limit = 20)
    @primes = []
    limit = limit.to_i 
    return if limit.to_i < 2
    arr = Hash[*((2..limit).to_a*2).sort] # we can use .zip too
    (2..Math.sqrt(limit)).each do |i|
      next unless arr[i] # already removed
      (i*i..limit).step(i).each{|k| arr.delete(k)}
    end
    @primes = arr.keys.sort # return just keys
  end
end

class MyPrime

attr_reader :primes # there we can read then

# compute prime numbers up to limit, default is 20

def initialize(limit = 20)

@primes = []

limit = limit.to_i

return if limit.to_i < 2

arr = Hash[*((2..limit).to_a*2).sort] # we can use .zip too

(2..Math.sqrt(limit)).each do |i|

next unless arr[i] # already removed

(i*i..limit).step(i).each{|k| arr.delete(k)}

end

@primes = arr.keys.sort # return just keys

end

we can add some tests

require 'test/unit'
require 'my_prime'

class TestMyPrime < Test::Unit::TestCase

  def test_20_primes
    primes = MyPrime.new(20)
    assert_equal [2, 3, 5, 7, 11, 13, 17, 19], primes.primes
  end

  def test_wo_param
    primes = MyPrime.new
    assert_equal [2, 3, 5, 7, 11, 13, 17, 19], primes.primes
  end

  def test_less_than_2
    primes = MyPrime.new(1)
    assert_equal [], primes.primes 
  end

  def test_limit_eq_2
    primes = MyPrime.new(2)
    assert_equal [2], primes.primes
  end

  def test_limit_is_string
    primes = MyPrime.new('20')
    assert_equal [2, 3, 5, 7, 11, 13, 17, 19], primes.primes
  end

  def test_limit_is_float
    primes = MyPrime.new(20.50)
    assert_equal [2, 3, 5, 7, 11, 13, 17, 19], primes.primes
  end

end

require 'test/unit'

require 'my_prime'

class TestMyPrime < Test::Unit::TestCase

def test_20_primes

primes = MyPrime.new(20)

assert_equal [2, 3, 5, 7, 11, 13, 17, 19], primes.primes

end

def test_wo_param

primes = MyPrime.new

assert_equal [2, 3, 5, 7, 11, 13, 17, 19], primes.primes

end

def test_less_than_2

primes = MyPrime.new(1)

assert_equal [], primes.primes

end

def test_limit_eq_2

primes = MyPrime.new(2)

assert_equal [2], primes.primes

end

def test_limit_is_string

primes = MyPrime.new('20')

assert_equal [2, 3, 5, 7, 11, 13, 17, 19], primes.primes

end

def test_limit_is_float

primes = MyPrime.new(20.50)

assert_equal [2, 3, 5, 7, 11, 13, 17, 19], primes.primes

end

Sportka v FMS/MSW Logo

June 5, 2010February 16, 2013 by Tom

dnes jsme vymýšleli s Bubajzníkem. Nápad měl dobrý, jen dokumentace k MSWLogu stojí zaprd, nainstalováno FMS Logo (nástupce). Princip je jednoduchý.

NEON: get/post/put requests

May 21, 2010February 16, 2013 by Tom

using neon (an HTTP and WebDAV client library, with a C interface)
see how to use GET / PUT / POST in some (not-so-perfect) examples

iPhone SDK4 Beta 4

May 18, 2010May 21, 2010 by Tom

Apple has released new version of iPhone OS4 SDK (SDK4) Beta 4…

Build: 10M2252

Download & Availability: iPhone Developer Program/Members only

How to get line number and file of your RoR code

May 18, 2010February 16, 2013 by Tom

    # parse caller to fetch filename, method &amp;amp; line of call
    def parse_caller(at)
      if /^(.+?):(\d+)(?::in `(.*)')?/ =~ at
        file = Regexp.last_match[1]
        line = Regexp.last_match[2].to_i
        method = Regexp.last_match[3]
        [file, line, method]
      end
    end

# parse caller to fetch filename, method &amp; line of call

def parse_caller(at)

if /^(.+?):(\d+)(?::in `(.*)')?/ =~ at

file = Regexp.last_match[1]

line = Regexp.last_match[2].to_i

method = Regexp.last_match[3]

[file, line, method]

end

  file, line, method = parse_caller(caller(1).first)

1	file, line, method = parse_caller(caller(1).first)

custom date/time formatting with i18n

March 22, 2009February 16, 2013 by Tom

in helper

def show_date(date)
  return '' if date.nil? || date==0
  l(Time.at(date), :format => :ddate)
end

def show_date(date)

return '' if date.nil? || date==0

l(Time.at(date), :format => :ddate)

end

in config/locale/en.yml (for example)

date:
  formats:
  ddate: %d.%m.%Y

date:

formats:

ddate: %d.%m.%Y

add czech pluralize to i18n

March 22, 2009February 16, 2013 by Tom

module I18n::Backend
  class Simple

  protected

  def pluralize(locale, entry, count)
    return entry unless entry.is_a?(Hash) and count
    key = :zero if count == 0 && entry.has_key?(:zero)
    key ||= count == 1 ? :one : (2..4).include?(count) ? :few : :other
    raise InvalidPluralizationData.new(entry, count) unless entry.has_key?(key)
    entry[key]
  end

  end # class

end # module

module I18n::Backend

class Simple

protected

def pluralize(locale, entry, count)

return entry unless entry.is_a?(Hash) and count

key = :zero if count == 0 && entry.has_key?(:zero)

key ||= count == 1 ? :one : (2..4).include?(count) ? :few : :other

raise InvalidPluralizationData.new(entry, count) unless entry.has_key?(key)

entry[key]

end

end # class

end # module

normalize UTF8 (translit/deaccent)

March 22, 2009February 16, 2013 by Tom

place this in your application.rb (eg)

class String
  def translit
    Unicode.normalize_KD(self).unpack('U*').select{ |cp| cp < 127 }.pack('U*').gsub(/ /,'-').downcase
  end
end

class String

def translit

Unicode.normalize_KD(self).unpack('U*').select{ |cp| cp < 127 }.pack('U*').gsub(/ /,'-').downcase

end

tom's blog

some thoughts…

Tag: programming

bash to resolve dependencies

Print simple x*x table in ruby

Calculate prime numbers

Sportka v FMS/MSW Logo

NEON: get/post/put requests

iPhone SDK4 Beta 4

How to get line number and file of your RoR code

custom date/time formatting with i18n

add czech pluralize to i18n

normalize UTF8 (translit/deaccent)