Hesabu : equations solver relies on https://github.com/BLSQ/go-hesabu to solve equations
Hesabu is swahili word for arithmetic.
solver = Hesabu::Solver.new
solver.add("c", "a + b")
solver.add("a", "10")
solver.add("b", "10 + a")
solution = solver.solve!
expect(solution).to eq("a" => 10, "b" => 20, "c" => 30)The solver will deduce the correct order and find the values of a,b and c.
The expressions can be more complex (excel like), see the supported functions here
When parsing or solving, things can go wrong, here are various cases
Currently the solver :
- is case sensitive.
- and fast (32000 equations in 3 seconds)
- https://github.com/rubysolo/dentaku more complete, currently less performant.
# only the fast
bundle exec rspec --tag ~slow
# all with integration test, expect around 30-40 seconds depending on your machine
bundle exec rspec
RUBY_PROF_MEASURE_MODE=wall PROF=true bundle exec rspec ./spec/lib/hesabu/integration_spec.rb
RUBY_PROF_MEASURE_MODE=allocations PROF=true bundle exec rspec ./spec/lib/hesabu/integration_spec.rb
then look at the numbers launch the complete test suite and verify timings before and after
one time setup
gem install gem-release
curl -u rubygemaccount https://rubygems.org/api/v1/api_key.yaml > ~/.gem/credentials
chmod 0600 ~/.gem/credentials
gem bump --tag --release
The gem is available as open source under the terms of the MIT License.