added support to ex and not_ex

Author: thadeu

README.md

@@ -67,14 +67,16 @@ Without configuration, because we use only Ruby. ❤️
 | ----------- | ----------- | ----------- |
 | Equal | eq      | Anywhere |
 | NotEqual | noteq        | Anywhere |
+| Exists | ex        | Anywhere |
+| NotExists | not_ex        | Anywhere |
 | Contains | cont        | Anywhere |
-| NotContains | notcont        | Anywhere |
+| NotContains | notcont, not_cont        | Anywhere |
 | Included | in  | Anywhere |
-| NotIncluded | notin        | Anywhere |
-| Start | start        | Anywhere |
-| NotStart | notstart        | Anywhere |
+| NotIncluded | notin, not_in       | Anywhere |
+| Start | start, st        | Anywhere |
+| NotStart | notstart, notst, not_start, not_st        | Anywhere |
 | End | end        | Anywhere |
-| NotEnd | notend        | Anywhere |
+| NotEnd | notend, not_end        | Anywhere |
 | LessThan | lt        | Anywhere |
 | LessThanEqual | lteq        | Anywhere |
 | GreaterThan | gt        | Anywhere |

lib/revector.rb

@@ -3,9 +3,10 @@
 require 'set'
 
 require_relative 'revector/utility'
+require_relative 'revector/predicate/equal'
+require_relative 'revector/predicate/exists'
 require_relative 'revector/predicate/startify'
 require_relative 'revector/predicate/endify'
-require_relative 'revector/predicate/equal'
 require_relative 'revector/predicate/contains'
 require_relative 'revector/predicate/in'
 require_relative 'revector/predicate/less_than'
@@ -54,6 +55,7 @@ def find_by_hash(key, pair_condition, row)
 
       case right
       in [*]
+        right = [''] unless right.any?
         Array(right).any? { |o| predicatable.compare(o, valueable) }
       else
         predicatable.compare(right, valueable)
@@ -67,7 +69,7 @@ def find_by_other(key, value, row)
     predicate = Array(parts[-2..]).filter do |pkey|
       next unless PREDICATES.include? pkey
 
-      parts = parts - [pkey]
+      parts -= [pkey]
 
       pkey
     end&.last || :eq
@@ -103,21 +105,25 @@ def find_by_other(key, value, row)
       not_end: NotEndify,
       in: Included,
       notin: NotIncluded,
-      not_in: NotIncluded
+      not_in: NotIncluded,
+      ex: Exists,
+      not_ex: NotExists
     }[named.to_sym || :eq]
   end
   private_constant :Predicate
 
   AFFIRMATIVES = %w[
-    eq
+    eq ex
     in cont
     lt lteq
     gt gteq
-    st start end
+    st start
+    end
   ].freeze
 
   NEGATIVES = %w[
     noteq not_eq
+    not_ex
     notcont not_cont
     notstart notst not_start not_st
     notend not_end

lib/revector/predicate/equal.rb

@@ -17,7 +17,7 @@ def self.check!(item, iteratee, value)
     end
 
     def self.compare(value, expected_value)
-      !Equal.compare(value, expected_value)
+      !Exists.compare(value) && !Equal.compare(value, expected_value)
     end
   end
 end

lib/revector/predicate/exists.rb

@@ -0,0 +1,28 @@
+# frozen_string_literal: true
+
+class Revector
+  module Exists
+    def self.check!(item, iteratee)
+      compare(Utility::TryFetchOrBlank[item, iteratee])
+    end
+
+    def self.compare(value, other = false)
+      case value
+      in [*] | String
+        value.size.positive?.to_s == other.to_s
+      else
+        !!value.to_s == other.to_s
+      end
+    end
+  end
+
+  module NotExists
+    def self.check!(item, iteratee)
+      !Exists.check!(item, iteratee)
+    end
+
+    def self.compare(value, other = nil)
+      !Exists.compare(value, other)
+    end
+  end
+end

lib/revector/version.rb

@@ -1,5 +1,5 @@
 # frozen_string_literal: true
 
 class Revector
-  VERSION = '0.1.0'
+  VERSION = '0.1.1'
 end

spec/lib/revector/version_spec.rb

@@ -4,6 +4,6 @@
 
 RSpec.describe Revector do
   it 'must have a version number' do
-    expect(described_class::VERSION).to eq('0.1.0')
+    expect(described_class::VERSION).to eq('0.1.1')
   end
 end

spec/lib/revector_spec.rb

@@ -9,6 +9,7 @@
         id: 1,
         name: 'Test #1',
         email: '[email protected]',
+        contact_id: '1',
         schedule: { all_day: true, opened: true },
         numbers: %w[1 2],
         phones: [
@@ -22,6 +23,7 @@
         id: 2,
         name: 'Test #2',
         email: '[email protected]',
+        contact_id: '2',
         schedule: { all_day: false, opened: false },
         numbers: %w[3 4],
         phones: [],
@@ -32,6 +34,7 @@
         id: 3,
         name: 'Test #3',
         email: '[email protected]',
+        contact_id: '',
         schedule: { all_day: false, opened: false },
         numbers: %w[5 6],
         phones: [
@@ -44,6 +47,40 @@
   end
 
   context 'Deep values' do
+    context 'ex' do
+      it 'if the value is not empty' do
+        filters = { 'phones.number': { ex: 'true' } }
+
+        collection = described_class.swap(data, filters)
+
+        expect(collection.size).to eq(2)
+      end
+
+      it 'if the value is not empty' do
+        filters = { 'phones.number': { not_ex: 'true' } }
+
+        collection = described_class.swap(data, filters)
+
+        expect(collection.size).to eq(1)
+      end
+
+      it 'if the value is not empty' do
+        filters = { contact_id: { ex: 'true' } }
+
+        collection = described_class.swap(data, filters)
+
+        expect(collection.size).to eq(2)
+      end
+
+      it 'if the value is empty' do
+        filters = { contact_id: { not_ex: 'true' } }
+
+        collection = described_class.swap(data, filters)
+
+        expect(collection.size).to eq(1)
+      end
+    end
+
     context 'eq' do
       context 'array of hash' do
         it 'match array values in deep structure' do