Results for filter-iter

Get an iterator on a solr filter using stream/cursor

A fluentd filter plugin that will be used to Iterate over the object with its index and returns the value of the given object.

A fluentd filter plugin that will be used to Iterate over the object with its index and returns the value of the given object.

Streaming CSV processor with row-by-row transforms, validations, column plucking, streaming each_hash iteration, filtering, writing, error recovery, and automatic delimiter detection.

== Synopsys Ruby Enumerable extension. Main idea is lazy computations within enumerators. == Usage Install as a gem: sudo gem install deferred_enum This gem introduces DeferredEnumerator class: ary = [1, 2, 3, 4] deferred = ary.defer # #<DeferredEnumerator: [1, 2, 3, 4]:each> DeferredEnumerator brings some optimizations to all?, any? and none? predicates deferred.all?(&:even?) # Will stop iteration after first false-result = 1 iteration deferred.none?(&:even?) # 2 iterations deferred.any?(&:even?) # 2 iterations It also introduces lazy versions of Enumerable's #select, #map and #reject methods deferred.map { |i| i + 1 } # #<DeferredEnumerator: #<Enumerator::Generator>:each> deferred.select { |i| i.even? } # #<DeferredEnumerator: #<Enumerator::Generator>:each> deferred.reject { |i| i.odd? } # #<DeferredEnumerator: #<Enumerator::Generator>:each> So you can safely chain your filters, they won't be treated as arrays: deferred.map(&:succ).select(&:even?) # #<DeferredEnumerator: #<Enumerator::Generator>:each> You can build chains of Enumerables: deferred.concat([2]).to_a # [1, 2, 3, 4, 2] Or append elements to the end of enumerator: deferred << 2 You can even remove duplicates from enumerator, though this operation can be tough: deferred.uniq # #<DeferredEnumerator: #<Enumerator::Generator>:each> There are many other methods in DeferredEnumerator, please refer to documentation.

Noisy sensor data, approximations in the equations that describe the system evolution, and external factors that are not accounted for all place limits on how well it is possible to determine the system's state. The Kalman filter deals effectively with the uncertainty due to noisy sensor data and to some extent also with random external factors. The Kalman filter produces an estimate of the state of the system as an average of the system's predicted state and of the new measurement using a weighted average. The purpose of the weights is that values with better (i.e., smaller) estimated uncertainty are "trusted" more. The weights are calculated from the covariance, a measure of the estimated uncertainty of the prediction of the system's state. The result of the weighted average is a new state estimate that lies between the predicted and measured state, and has a better estimated uncertainty than either alone. This process is repeated at every time step, with the new estimate and its covariance informing the prediction used in the following iteration. This means that the Kalman filter works recursively and requires only the last "best guess", rather than the entire history, of a system's state to calculate a new state.

lithos is a self-contained embedded key-value store written from scratch as a native extension — no external database dependency. It uses a log-structured merge (LSM) tree: a write-ahead log makes every write durable, an in-memory sorted memtable flushes to immutable SSTables (with bloom filters), and compaction merges them. Keys and values are arbitrary binary strings; keys are kept in sorted order so you get ordered iteration and range scans, plus crash recovery via WAL replay. Windows MSVC (mswin) Ruby only.

== Description ["Kiwi is a versatile entity component system focussing on fast iteration and a nice api.\n", "\n", "To get started, read the [usage guide](#usage) below.\n", "\n", "[](https://github.com/Jomy10/kiwi-ecs-ruby/actions/workflows/tests.yml)\n", "\n", "## Installation\n", "\n", "The library is available from [ruby gems](https://rubygems.org/gems/kiwi-ecs):\n", "\n", "```sh\n", "gem install kiwi-ecs\n", "```\n", "\n", "To use it in your ruby source files:\n", "\n", "```ruby\n", "require 'kiwi-ecs'\n", "```\n", "\n", "## Usage\n", "\n", "### The world\n", "\n", "The world is the main object that controls the ecs.\n", "\n", "```ruby\n", "world = Kiwi::World.new\n", "```\n", "\n", "### Components\n", "\n", "Creating a component is as simple as declaring a struct:\n", "\n", "```ruby\n", "Position = Struct.new :x, :y\n", "```\n", "\n", "Classes can also be used instead of structs\n", "\n", "```ruby\n", "class Velocity\n", " attr_accessor :x\n", " attr_accessor :y\n", "end\n", "```\n", "\n", "### Entities\n", "\n", "An entity is spawned with a set of components:\n", "\n", "```ruby\n", "entityId = world.spawn(Position.new(10, 10))\n", "\n", "world.spawn(Position.new(3, 5), Velocity.new(1.5, 0.0))\n", "```\n", "\n", "The `world.spawn(*components)` function will return the id of the spawned entity.\n", "\n", "Killing an entity can be done using `world.kill(entityId)`:\n", "\n", "```ruby\n", "world.kill(entityId)\n", "```\n", "\n", "### Systems\n", "\n", "#### Queries\n", "\n", "Queries can be constructed as follows:\n", "\n", "```ruby\n", "# Query all position componentss\n", "world.query(Position) do |pos|\n", " puts pos\n", "end\n", "\n", "# Query all entities having a position and a velocity component, and their entity ids\n", "world.query_with_ids(Position, Velocity) do |id, pos, vel|\n", " # ...\n", "end\n", "```\n", "\n", "### Flags\n", "\n", "Entities can be tagged using flags\n", "\n", "#### Defining flags\n", "\n", "A flag is an integer\n", "\n", "```ruby\n", "module Flags\n", " Player = 0\n", " Enemy = 1\n", "end\n", "```\n", "\n", "#### Setting flags\n", "\n", "```ruby\n", "id = world.spawn\n", "\n", "world.set_flag(id, Flags::Player)\n", "```\n", "\n", "#### Removing a flag\n", "\n", "```ruby\n", "world.remove_flag(id, Flags::Player)\n", "```\n", "\n", "#### Checking wether an entity has a flag\n", "\n", "```ruby\n", "world.has_flag(id, Flags::Player)\n", "```\n", "\n", "#### Filtering queries with flags\n", "\n", "```ruby\n", "world.query_with_ids(Pos)\n", " .filter do |id, pos|\n", " world.has_flag(id, Flags::Player)\n", " end\n", " .each do |id, pos|\n", " # Do something with the filtered query\n", " end\n", "```\n", "\n", "The `hasFlags` function is also available for when you want to check multiple flags.\n", "\n", "## Road map\n", "\n", "- [ ] System groups\n", "\n", "## Contributing\n", "\n", "Contributors are welcome to open an issue requesting new features or fixes or opening a pull request for them.\n", "\n", "## License\n", "\n", "The library is licensed under LGPLv3.\n"]

Contentful API wrapper library exposing an ActiveRecord-like interface

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