Improved reverse searches a bit.

This commit is contained in:
Luka Vandervelden 2020-01-12 14:50:10 +01:00
parent 863bf369b8
commit 1bb5268602
2 changed files with 25 additions and 36 deletions

View File

@ -170,7 +170,7 @@ describe "DODB::DataBase" do
item.should eq Ship.all_ships[index]
end
db.reverse_each_with_index do |item, index|
db.each_with_index(reversed: true) do |item, index|
item.should eq Ship.all_ships.reverse[index]
end
end

View File

@ -178,62 +178,51 @@ class DODB::DataBase(V)
@indexers.each &.deindex(stringify_key(key), value)
end
##
# CAUTION: Very slow. Try not to use.
# Can be useful for making dumps or to restore a database, however.
def each_with_index
dirname = data_path
Dir.each_child dirname do |child|
next if child.match /^\./
full_path = "#{dirname}/#{child}"
begin
# FIXME: Only intercept JSON parsing errors.
field = read full_path
rescue
next
private def each_key(reversed = false)
range = if reversed
(last_index..0)
else
(0..last_index)
end
key = child.gsub(/\.json$/, "").to_i
yield field, key
end
end
def each
each_with_index do |item, index|
yield item
end
end
def reverse_each_with_index
(last_index..0).each do |key|
range.each do |key|
full_path = file_path key
next unless File.exists? full_path
yield key, full_path
end
end
##
# CAUTION: Very slow. Try not to use.
# Can be useful for making dumps or to restore a database, however.
def each_with_index(reversed = false)
dirname = data_path
each_key(reversed) do |key, path|
begin
# FIXME: Only intercept JSON parsing errors.
item = read full_path
field = read path
rescue
next
end
yield item, key
yield field, key
end
end
def reverse_each
reverse_each_with_index do |item, index|
def each(reversed = false)
each_with_index(reversed: reversed) do |item, index|
yield item
end
end
##
# CAUTION: Very slow. Try not to use.
def to_a
def to_a(reversed = false)
array = ::Array(V).new
each do |value|
each(reversed) do |value|
array << value
end