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https://github.com/Jermolene/TiddlyWiki5
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jeremy@jermolene.com
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167
core/modules/filters/json-ops.js
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167
core/modules/filters/json-ops.js
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/*\
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title: $:/core/modules/filters/json-ops.js
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type: application/javascript
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module-type: filteroperator
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Filter operators for JSON operations
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\*/
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(function(){
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/*jslint node: true, browser: true */
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/*global $tw: false */
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"use strict";
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exports["getjson"] = function(source,operator,options) {
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var results = [];
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source(function(tiddler,title) {
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var data = options.wiki.getTiddlerDataCached(title);
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if(data) {
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var item = getDataItemValueAsStrings(data,operator.operands);
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if(item !== undefined) {
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results.push.apply(results,item);
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}
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}
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});
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return results;
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};
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exports["indexesjson"] = function(source,operator,options) {
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var results = [];
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source(function(tiddler,title) {
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var data = options.wiki.getTiddlerDataCached(title);
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if(data) {
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var item = getDataItemKeysAsStrings(data,operator.operands);
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if(item !== undefined) {
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results.push.apply(results,item);
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}
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}
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});
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return results;
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};
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exports["typejson"] = function(source,operator,options) {
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var results = [];
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source(function(tiddler,title) {
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var data = options.wiki.getTiddlerDataCached(title);
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if(data) {
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var item = getDataItemType(data,operator.operands);
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if(item !== undefined) {
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results.push(item);
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}
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}
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});
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return results;
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};
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/*
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Given a JSON data structure and an array of index strings, return an array of the string representation of the values at the end of the index chain, or "undefined" if any of the index strings are invalid
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*/
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function getDataItemValueAsStrings(data,indexes) {
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// Get the item
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var item = getDataItem(data,indexes);
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// Return the item as a string
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return convertDataItemValueToStrings(item);
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}
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/*
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Given a JSON data structure and an array of index strings, return an array of the string representation of the keys of the item at the end of the index chain, or "undefined" if any of the index strings are invalid
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*/
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function getDataItemKeysAsStrings(data,indexes) {
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// Get the item
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var item = getDataItem(data,indexes);
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// Return the item keys as a string
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return convertDataItemKeysToStrings(item);
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}
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/*
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Return an array of the string representation of the values of a data item, or "undefined" if the item is undefined
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*/
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function convertDataItemValueToStrings(item) {
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// Return the item as a string
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if(item === undefined) {
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return item;
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}
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if(typeof item === "object") {
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if(item === null) {
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return ["null"];
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}
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var results = [];
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if($tw.utils.isArray(item)) {
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$tw.utils.each(item,function(value) {
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results.push.apply(results,convertDataItemValueToStrings(value));
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});
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return results;
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} else {
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$tw.utils.each(Object.keys(item).sort(),function(key) {
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results.push.apply(results,convertDataItemValueToStrings(item[key]));
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});
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return results;
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}
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}
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return [item.toString()];
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}
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/*
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Return an array of the string representation of the keys of a data item, or "undefined" if the item is undefined
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*/
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function convertDataItemKeysToStrings(item) {
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// Return the item as a string
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if(item === undefined) {
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return item;
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} else if(typeof item === "object") {
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if(item === null) {
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return [];
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}
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var results = [];
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if($tw.utils.isArray(item)) {
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for(var i=0; i<item.length; i++) {
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results.push(i.toString());
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}
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return results;
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} else {
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$tw.utils.each(Object.keys(item).sort(),function(key) {
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results.push(key);
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});
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return results;
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}
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}
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return [];
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}
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function getDataItemType(data,indexes) {
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// Get the item
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var item = getDataItem(data,indexes);
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// Return the item type
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if(item === undefined) {
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return item;
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} else if(item === null) {
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return "null";
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} else if($tw.utils.isArray(item)) {
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return "array";
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} else if(typeof item === "object") {
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return "object";
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} else {
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return typeof item;
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}
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}
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/*
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Given a JSON data structure and an array of index strings, return the value at the end of the index chain, or "undefined" if any of the index strings are invalid
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*/
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function getDataItem(data,indexes) {
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if(indexes.length === 0 || (indexes.length === 1 && indexes[0] === "")) {
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return data;
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}
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// Get the item
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var item = data;
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for(var i=0; i<indexes.length; i++) {
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if(item !== undefined) {
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item = item[indexes[i]];
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}
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}
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return item;
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}
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})();
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82
editions/test/tiddlers/tests/test-json-filters.js
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82
editions/test/tiddlers/tests/test-json-filters.js
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/*\
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title: test-json-filters.js
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type: application/javascript
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tags: [[$:/tags/test-spec]]
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Tests the JSON filters.
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\*/
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(function(){
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/* jslint node: true, browser: true */
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/* eslint-env node, browser, jasmine */
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/* eslint no-mixed-spaces-and-tabs: ["error", "smart-tabs"]*/
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/* global $tw, require */
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"use strict";
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describe("json filter tests", function() {
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var wiki = new $tw.Wiki();
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var tiddlers = [{
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title: "First",
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text: '{"a":"one","b":"","c":1.618,"d": {"e": "four","f": ["five","six",true,false,null]}}',
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type: "application/json"
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},{
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title: "Second",
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text: '["une","deux","trois"]',
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type: "application/json"
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}];
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wiki.addTiddlers(tiddlers);
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it("should support the getindex operator", function() {
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expect(wiki.filterTiddlers("[[First]getindex[b]]")).toEqual([]);
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});
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it("should support the getjson operator", function() {
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expect(wiki.filterTiddlers("[[First]getjson[]]")).toEqual(["one","","1.618","four","five","six","true","false","null"]);
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expect(wiki.filterTiddlers("[[First]getjson[a]]")).toEqual(["one"]);
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expect(wiki.filterTiddlers("[[First]getjson[b]]")).toEqual([""]);
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expect(wiki.filterTiddlers("[[First]getjson[d]]")).toEqual(["four","five","six","true","false","null"]);
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expect(wiki.filterTiddlers("[[First]getjson[d],[e]]")).toEqual(["four"]);
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expect(wiki.filterTiddlers("[[First]getjson[d],[f]]")).toEqual(["five","six","true","false","null"]);
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expect(wiki.filterTiddlers("[[First]getjson[d],[f],[0]]")).toEqual(["five"]);
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expect(wiki.filterTiddlers("[[First]getjson[d],[f],[1]]")).toEqual(["six"]);
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expect(wiki.filterTiddlers("[[First]getjson[d],[f],[2]]")).toEqual(["true"]);
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expect(wiki.filterTiddlers("[[First]getjson[d],[f],[3]]")).toEqual(["false"]);
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expect(wiki.filterTiddlers("[[First]getjson[d],[f],[4]]")).toEqual(["null"]);
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});
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it("should support the indexesjson operator", function() {
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expect(wiki.filterTiddlers("[[Second]indexesjson[]]")).toEqual(["0","1","2"]);
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expect(wiki.filterTiddlers("[[First]indexesjson[]]")).toEqual(["a","b","c","d"]);
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expect(wiki.filterTiddlers("[[First]indexesjson[a]]")).toEqual([]);
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expect(wiki.filterTiddlers("[[First]indexesjson[b]]")).toEqual([]);
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expect(wiki.filterTiddlers("[[First]indexesjson[d]]")).toEqual(["e","f"]);
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expect(wiki.filterTiddlers("[[First]indexesjson[d],[e]]")).toEqual([]);
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expect(wiki.filterTiddlers("[[First]indexesjson[d],[f]]")).toEqual(["0","1","2","3","4"]);
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expect(wiki.filterTiddlers("[[First]indexesjson[d],[f],[0]]")).toEqual([]);
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expect(wiki.filterTiddlers("[[First]indexesjson[d],[f],[1]]")).toEqual([]);
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expect(wiki.filterTiddlers("[[First]indexesjson[d],[f],[2]]")).toEqual([]);
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expect(wiki.filterTiddlers("[[First]indexesjson[d],[f],[3]]")).toEqual([]);
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expect(wiki.filterTiddlers("[[First]indexesjson[d],[f],[4]]")).toEqual([]);
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});
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it("should support the typejson operator", function() {
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expect(wiki.filterTiddlers("[[First]typejson[]]")).toEqual(["object"]);
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expect(wiki.filterTiddlers("[[First]typejson[a]]")).toEqual(["string"]);
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expect(wiki.filterTiddlers("[[First]typejson[b]]")).toEqual(["string"]);
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expect(wiki.filterTiddlers("[[First]typejson[c]]")).toEqual(["number"]);
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expect(wiki.filterTiddlers("[[First]typejson[d]]")).toEqual(["object"]);
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expect(wiki.filterTiddlers("[[First]typejson[d],[e]]")).toEqual(["string"]);
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expect(wiki.filterTiddlers("[[First]typejson[d],[f]]")).toEqual(["array"]);
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expect(wiki.filterTiddlers("[[First]typejson[d],[f],[0]]")).toEqual(["string"]);
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expect(wiki.filterTiddlers("[[First]typejson[d],[f],[1]]")).toEqual(["string"]);
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expect(wiki.filterTiddlers("[[First]typejson[d],[f],[2]]")).toEqual(["boolean"]);
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expect(wiki.filterTiddlers("[[First]typejson[d],[f],[3]]")).toEqual(["boolean"]);
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expect(wiki.filterTiddlers("[[First]typejson[d],[f],[4]]")).toEqual(["null"]);
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});
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});
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})();
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