canjs
diff --git a/‎doc/can-query-logic.md
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diff --git a/‎doc/etc.md
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diff --git a/‎doc/examples/date-string-example.js
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diff --git a/‎doc/examples/recipe-example.js
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diff --git a/‎doc/examples/searchable-todo-example.js
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diff --git a/‎doc/examples/todo-example.js
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diff --git a/‎doc/examples/todo-union-example.js
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@@ -0,0 +1,42 @@
+import {DefineMap, QueryLogic, Reflect as canReflect} from "can";
+
+class DateStringSet {
+	constructor(value){
+		this.value = value;
+	}
+	// used to convert to a number
+	valueOf(){
+		return new Date(this.value).getTime();
+	}
+}
+
+canReflect.assignSymbols(DateStringSet.prototype,{
+	"can.serialize": function(){
+		return this.value;
+	}
+});
+
+const DateString = {
+	[Symbol.for("can.SetType")]: DateStringSet
+};
+
+const Todo = DefineMap.extend({
+	id: {type: "number", identity: true},
+	name: "string",
+	date: DateString
+});
+
+const queryLogic = new QueryLogic(Todo);
+
+const filter = queryLogic.filterMembers(
+	{filter: {date: {$gt: "Wed Apr 04 2018 10:00:00 GMT-0500 (CDT)"}}},
+	[{id: 1, name: "grab coffee", date: "Wed Apr 03 2018 10:00:00 GMT-0500 (CDT)"},
+	{id: 2, name: "finish these docs", date: "Thurs Apr 05 2018 10:00:00 GMT-0500 (CDT)"},
+	{id: 3, name: "Learn CanJS", date: "Thurs Apr 05 2017 10:00:00 GMT-0500 (CDT)"}]
+); 
+
+console.log(filter); //-> {
+// 	id: 2,
+// 	name: "finish these docs",
+// 	date: "Wed Apr 05 2018 10:00:00 GMT-0500 (CDT)"
+// }
@@ -0,0 +1,95 @@
+import {QueryLogic, Reflect as canReflect} from "can";
+
+// Takes the value of `name` (ex: `"chicken"`)
+function SearchableStringSet(value) {
+  this.value = value;
+}
+
+canReflect.assignSymbols(SearchableStringSet.prototype,{
+  // Returns if the name on a todo is actually a member of the set.
+  "can.isMember": function(value){
+    return value.includes(this.value);
+  },
+  // Converts back to a value that can be in a query.
+  "can.serialize": function(){
+    return this.value;
+  }
+});
+
+// Specify how to do the fundamental set comparisons.
+QueryLogic.defineComparison(SearchableStringSet,SearchableStringSet,{
+  // Return a set that would load all records in searchA and searchB.
+  union(searchA, searchB){
+    // If searchA's text contains searchB's text, then
+    // searchB will include searchA's results.
+    if(searchA.value.includes(searchB.value)) {
+      // A:`food` ∪ B:`foo` => `foo`
+      return searchB;
+    }
+    if(searchB.value.includes(searchA.value)) {
+      // A:`foo` ∪ B:`food` => `foo`
+      return searchA;
+    }
+    // A:`ice` ∪ B:`cream` => `ice` || `cream`
+    return new QueryLogic.ValueOr([searchA, searchB]);
+  },
+  // Return a set that would load records shared by searchA and searchB.
+  intersection(searchA, searchB){
+    // If searchA's text contains searchB's text, then
+    // searchA is the shared search results.
+    if(searchA.value.includes(searchB.value)) {
+        // A:`food` ∩ B:`foo` => `food`
+        return searchA;
+    }
+    if(searchB.value.includes(searchA.value)) {
+        // A:`foo` ∩ B:`food` => `food`
+      return searchB;
+    }
+    // A:`ice` ∩ B:`cream` => `ice` && `cream`
+    // But suppose AND isn't supported,
+    // So we return `UNDEFINABLE`.
+    return QueryLogic.UNDEFINABLE;
+  },
+  // Return a set that would load records in searchA that are not in
+  // searchB.
+  difference(searchA, searchB){
+    // if searchA's text contains searchB's text, then
+    // searchA has nothing outside what searchB would return.
+    if(searchA.value.includes(searchB.value)) {
+      // A:`food` \ B:`foo` => ∅
+      return QueryLogic.EMPTY;
+    }
+    // If searchA has results outside searchB's results
+    // then there are records, but we aren't able to
+    // create a string that represents this.
+    if(searchB.value.includes(searchA.value)) {
+      // A:`foo` \ B:`food` => UNDEFINABLE
+      return QueryLogic.UNDEFINABLE;
+    }
+
+    // A:`ice` \ B:`cream` => `ice` && !`cream`
+    // If there's another situation, we
+    // aren't able to express the difference
+    // so we return UNDEFINABLE.
+    return QueryLogic.UNDEFINABLE;
+  }
+});
+
+const recipes = [
+  {id: 1, name: "garlic chicken"},
+  {id: 2, name: "ice cream"},
+  {id: 3, name: "chicken kiev"}
+];
+
+const queryLogic = new QueryLogic({ keys: {
+  name : {[Symbol.for("can.SetType")]: SearchableStringSet}
+}});
+
+const result = queryLogic.filterMembers({
+  filter: {name: "chicken"}
+}, recipes);
+
+console.log( result ); //-> [
+  // {id: 1, name: "garlic chicken"},
+  // {id: 3, name: "chicken kiev"}
+  // ]
@@ -0,0 +1,100 @@
+import {DefineMap, QueryLogic, Reflect as canReflect} from "can";
+
+// Takes the value of `name` (ex: `"chicken"`)
+function SearchableStringSet(value) {
+  this.value = value;
+}
+
+canReflect.assignSymbols(SearchableStringSet.prototype,{
+  // Returns if the name on a todo is actually a member of the set.
+  "can.isMember": function(value){
+    return value.includes(this.value);
+  },
+  // Converts back to a value that can be in a query.
+  "can.serialize": function(){
+    return this.value;
+  }
+});
+
+// Specify how to do the fundamental set comparisons.
+QueryLogic.defineComparison(SearchableStringSet,SearchableStringSet,{
+  // Return a set that would load all records in searchA and searchB.
+  union(searchA, searchB){
+    // If searchA's text contains searchB's text, then
+    // searchB will include searchA's results.
+    if(searchA.value.includes(searchB.value)) {
+      // A:`food` ∪ B:`foo` => `foo`
+      return searchB;
+    }
+    if(searchB.value.includes(searchA.value)) {
+      // A:`foo` ∪ B:`food` => `foo`
+      return searchA;
+    }
+    // A:`ice` ∪ B:`cream` => `ice` || `cream`
+    return new QueryLogic.ValueOr([searchA, searchB]);
+  },
+  // Return a set that would load records shared by searchA and searchB.
+  intersection(searchA, searchB){
+    // If searchA's text contains searchB's text, then
+    // searchA is the shared search results.
+    if(searchA.value.includes(searchB.value)) {
+        // A:`food` ∩ B:`foo` => `food`
+        return searchA;
+    }
+    if(searchB.value.includes(searchA.value)) {
+        // A:`foo` ∩ B:`food` => `food`
+      return searchB;
+    }
+    // A:`ice` ∩ B:`cream` => `ice` && `cream`
+    // But suppose AND isn't supported,
+    // So we return `UNDEFINABLE`.
+    return QueryLogic.UNDEFINABLE;
+  },
+  // Return a set that would load records in searchA that are not in
+  // searchB.
+  difference(searchA, searchB){
+    // if searchA's text contains searchB's text, then
+    // searchA has nothing outside what searchB would return.
+    if(searchA.value.includes(searchB.value)) {
+      // A:`food` \ B:`foo` => ∅
+      return QueryLogic.EMPTY;
+    }
+    // If searchA has results outside searchB's results
+    // then there are records, but we aren't able to
+    // create a string that represents this.
+    if(searchB.value.includes(searchA.value)) {
+      // A:`foo` \ B:`food` => UNDEFINABLE
+      return QueryLogic.UNDEFINABLE;
+    }
+
+    // A:`ice` \ B:`cream` => `ice` && !`cream`
+    // If there's another situation, we
+    // aren't able to express the difference
+    // so we return UNDEFINABLE.
+    return QueryLogic.UNDEFINABLE;
+  }
+});
+
+const SearchableString = {
+  [Symbol.for("can.SetType")]: SearchableStringSet
+};
+
+const Todo = DefineMap.extend({
+  id: {type: "number", identity: true},
+  name: SearchableString,
+});
+
+const todos = [
+  {id: 1, name: "important meeting"},
+  {id: 2, name: "fall asleep during meeting"},
+  {id: 3, name: "find out what important means"}
+];
+
+const queryLogic = new QueryLogic(Todo);
+
+const result = queryLogic.filterMembers({
+  filter: {name: "important"}
+}, todos);
+
+console.log( todos ); //->[{id: 1, name: "important meeting"},{id: 3, name: "find out what important means"}]
+
@@ -0,0 +1,25 @@
+import {DefineMap, QueryLogic} from "can";
+
+const Todo = DefineMap.extend({
+	id: {
+		identity: true,
+		type: "number"
+	},
+	name: "string",
+	complete: "boolean"
+});
+
+const todoQueryLogic = new QueryLogic(Todo);
+
+const filter = todoQueryLogic.filterMembers({
+	filter: {
+		complete: false
+	},
+	sort: "-name",
+	page: {start: 0, end: 19}
+},[
+	{id: 1, name: "do dishes", complete: false},
+	{id: 2, name: "mow lawn", complete: true},
+	// ...
+]);
+console.log( filter ); //-> [{id: 1, name: "do dishes", complete: false}]
@@ -0,0 +1,19 @@
+import {DefineMap, QueryLogic} from "can";
+
+const Todo = DefineMap.extend({
+	id: {
+		identity: true,
+		type: "number"
+	},
+	name: "string",
+	complete: "boolean"
+});
+
+const todoQueryLogic = new QueryLogic(Todo);
+
+const unionization = todoQueryLogic.union(
+  { filter: {name: "assigned"} },
+  { filter: {name: "complete"} }
+);
+
+console.log( JSON.stringify(unionization) ); //-> "{'filter':{'name':{'$in':['assigned','complete']}}}"