# How to use firstKey method in Best

Best JavaScript code snippet using best

print.js

Source:print.js

`1//Print out a string recursively2function print(s) {3 console.log(s[0]);4 print(s.slice(1))5 return;6}7console.log("ABCD");8/*9 * This is a top-down, structural approach10 * We pass in a smaller subset of the original structure -> first to end of string11 */12function factorial(n) {13 if (n === 0)14 return 1;15 return n * factorial(n-1);16}17function fib(n) {18 if (n <=1 ) return n;19 return fib(n-1) + fib(n-2);20}21/*22 * This is structural where the number is the structure 23 * The depth is bound by the end of the substructure.24 */25function gcd(a, b) {26 if (b === 0) return a;27 return gcd(b, a % b )28}29/*30 * This is generative since the result is computed from the arguments rather than 31 * a successive number of calls.32 * There is no guarantee that generative algorithms terminate.33 */34function printFlatObj(obj) {35 if (Object.keys(obj).length === 0) {36 return;37 }38 //Here we identify a k,v pair as the substructure39 //For simplicity we use object.keys40 const firstKey = Object.keys(obj)[0];41 console.log(firstKey, obj[firstKey])42 delete obj[firstKey];43 printFlatObj(obj);44}45const obj = {a:1, b:2, c:3, d:4}46console.log(printFlatObj(obj));47const deepObj = {a:1, b: {c : 3, d:4}, e: 5}48function printDeepObj(obj) {49 if (Object.keys(obj).length === 0) {50 return;51 }52 const firstKey = Object.keys(obj)[0];53 if (typeof(obj[firstKey]) === 'object') {54 console.log(firstKey)55 printDeepObj(obj[firstKey]);56 delete obj[firstKey];57 printDeepObj(obj);58 return;59 }60 console.log(firstKey, obj[firstKey])61 delete obj[firstKey];62 printDeepObj(obj);63}64console.log("attempting deep obj")65console.log(printDeepObj(deepObj));66function printDeepObjAdjustKeys(obj){67 helper(obj, '');68}69function helper(obj, key) {70 if (Object.keys(obj).length === 0) {71 return;72 }73 const firstKey = Object.keys(obj)[0];74 if (key !== '') {75 keyToPrint = `\${key}.\${firstKey}`76 } else {77 keyToPrint = firstKey; 78 }79 if (typeof(obj[firstKey]) === 'object') {80 console.log(firstKey);81 //1. pass in (f) with f82 //2. pass in (g) with g83 helper(obj[firstKey], keyToPrint)84 delete obj[firstKey];85 helper(obj, '');86 return;87 }88 console.log(keyToPrint, obj[firstKey]);89 delete obj[firstKey];90 helper(obj, key)91}92console.log("attempting")93const deepObj2 = {a:1, b: {c : 3, d:4}, e: 5}94const deepObj3 = {a:1, b: {c : 3, d:4}, e: 5, f: { g : { h : 6, i: 7}, j: {"" : 8}}}95// f.j: 896console.log(printDeepObjAdjustKeys(deepObj3));97function flatObjPrintHandleEmpty(obj) {98 helper3(obj,'');99}100function helper3 (obj, key) {101 if (Object.keys(obj).length === 0) {102 return;103 }104 const firstKey = Object.keys(obj)[0];105 if (firstKey === "") {106 console.log('found it');107 keyToPrint = `\${key}`;108 } else if (key !== "") {109 keyToPrint = `\${key}.\${firstKey}`;110 } else {111 keyToPrint = firstKey; 112 }113 if (typeof(obj[firstKey]) === 'object') {114 console.log(firstKey);115 //1. pass in (f) with f116 //2. pass in (g) with g117 helper3(obj[firstKey], keyToPrint)118 delete obj[firstKey];119 helper3(obj, '');120 return;121 }122 console.log(keyToPrint, obj[firstKey]);123 delete obj[firstKey];124 helper3(obj, key)125}126console.log("#4")127const deepObj4 = {a:1, b: {c : 3, d:4}, e: 5, f: { g : { h : 6, i: 7}, j: {k : {"": 8}}}}128console.log(flatObjPrintHandleEmpty(deepObj4));129function recurseObj(obj, newObj, set) {130 const set = new Set();131 for (let key of obj) {132 console.log(key, obj[key]);133 break; 134 }135}136/*137 * function flattenDictionary(dict):138 flatDictionary = {}139 flattenDictionaryHelper("", dict, flatDictionary)140 return flatDictionary141function flattenDictionaryHelper(initialKey, dict, flatDictionary):142 for (key : dict.keyset()):143 value = dict.get(key)144 if (!isDictionary(value)): # the value is of a primitive type145 if (initialKey == null || initialKey == ""):146 flatDictionary.put(key, value)147 else:148 flatDictionary.put(initialKey + "." + key, value)149 else:150 if (initialKey == null || initialKey == "")151 flattenDictionaryHelper(key, value, flatDictionary)152 else:153 flattenDictionaryHelper(initialKey + "." + key, value, flatDictionary154 *155 */156function main(dict) {157 let flatDict = {};158 flattenDictionaryHelper("", dict, flatDict)159 return flatDict;160}161function flattenDictionaryHelper(initialKey, dict, flatDict) {162 for (let key in dict) {163 let val = dict[key];164 //primitive165 if (typeof(val) !== 'object') {166 if (initialKey == null || initialKey == "") {167 flatDict[key] = val;168 } else {169 flatDict[initialKey+"."+key] = val;170 }171 //object172 } else {173 console.log("!!",initialKey)174 if (initialKey === null || initialKey === undefined || initialKey === "") {175 flattenDictionaryHelper(key, val, flatDict);176 } else {177 flattenDictionaryHelper(initialKey + "." + key, val,flatDict) 178 }179 }180 }181}182const deepObj5 = {a:1, b: {c : 3, d:4}, e: 5, f: { g : { h : 6, i: 7}, j: {k : {"": 8}}}}183console.log(main(deepObj5));184/*185 * In this way this is bottom-up (accumulator)186 * The substructures are actually the objects by level187 * Outer level, inner level, inner-inner level...`

HashBasedTable.js

Source:HashBasedTable.js

`1const Utils = require(`./Utils`);2/**3 * HashBasedTable class4 */5class HashBasedTable {6 /**7 * Creates new HashBasedTable object8 */9 constructor() {10 const me = this;11 me.hashMap = new Map();12 }13 /**14 * Checks if keys are exist15 * @param firstKey16 * @param secondKey17 * @returns {boolean}18 */19 has(firstKey, secondKey) {20 const me = this;21 let result = false;22 if (secondKey) {23 const secondLevelMap = me.hashMap.get(firstKey);24 if (secondLevelMap) {25 result = secondLevelMap.has(secondKey);26 }27 } else {28 result = me.hashMap.has(firstKey);29 }30 return result;31 }32 /**33 * Returns value by keys34 * @param firstKey35 * @param secondKey36 * @returns {*}37 */38 get(firstKey, secondKey) {39 const me = this;40 let result;41 if (secondKey) {42 const secondLevelMap = me.hashMap.get(firstKey);43 if (secondLevelMap) {44 result = secondLevelMap.get(secondKey);45 }46 } else {47 result = me.hashMap.get(firstKey);48 }49 return result;50 }51 /**52 * Adds value by keys53 * @param firstKey54 * @param secondKey55 * @param items56 */57 add(firstKey, secondKey, items) {58 const me = this;59 let secondLevelMap = me.hashMap.get(firstKey);60 if (!secondLevelMap) {61 secondLevelMap = new Map();62 me.hashMap.set(firstKey, secondLevelMap);63 }64 let set = secondLevelMap.get(secondKey);65 if (!set) {66 set = new Set();67 secondLevelMap.set(secondKey, set);68 }69 Utils.forEach(items, (item) => set.add(item));70 }71 /**72 * Deletes value by keys73 * @param firstKey74 * @param secondKey75 * @returns {boolean}76 */77 delete(firstKey, secondKey) {78 const me = this;79 let result = false;80 if (secondKey) {81 const secondLevelMap = me.hashMap.get(firstKey);82 if (secondLevelMap) {83 result = secondLevelMap.delete(secondKey);84 }85 } else {86 result = me.hashMap.delete(firstKey);87 }88 return result;89 }90 /**91 * Returns size of map92 * @param firstKey93 * @param secondKey94 * @param needSetSize95 * @returns {*}96 */97 size(firstKey, secondKey, needSetSize=false) {98 const me = this;99 let result;100 if (secondKey) {101 const secondLevelMap = me.hashMap.get(firstKey);102 if (needSetSize) {103 const set = secondLevelMap.get(secondKey);104 if (set) {105 result = set.size;106 }107 } else {108 result = secondLevelMap.size;109 }110 } else {111 result = me.hashMap.size;112 }113 return result;114 }115}...`

sorting.js

Source:sorting.js

`1export const sortUp = (firstKey, secondKey) => {2 if (secondKey === '' || secondKey === undefined) {3 return (a, b) => {4 const x =5 typeof a[firstKey] === 'string'6 ? a[firstKey].toString().toLowerCase()7 : parseFloat(a[firstKey])8 const y =9 typeof b[firstKey] === 'string'10 ? b[firstKey].toString().toLowerCase()11 : parseFloat(b[firstKey])12 if (x < y) {13 return -114 }15 if (x > y) {16 return 117 }18 return 019 }20 }21 return (a, b) => {22 const x =23 typeof a[firstKey][secondKey] === 'string'24 ? a[firstKey][secondKey].toString().toLowerCase()25 : parseFloat(a[firstKey][secondKey])26 const y =27 typeof b[firstKey][secondKey] === 'string'28 ? b[firstKey][secondKey].toString().toLowerCase()29 : parseFloat(b[firstKey][secondKey])30 if (x < y) {31 return -132 }33 if (x > y) {34 return 135 }36 return 037 }38}39export const sortDown = (firstKey, secondKey) => {40 if (secondKey === '' || secondKey === undefined) {41 return (a, b) => {42 const x =43 typeof a[firstKey] === 'string'44 ? a[firstKey].toString().toLowerCase()45 : parseFloat(a[firstKey])46 const y =47 typeof b[firstKey] === 'string'48 ? b[firstKey].toString().toLowerCase()49 : parseFloat(b[firstKey])50 if (x < y) {51 return 152 }53 if (x > y) {54 return -155 }56 return 057 }58 }59 return (a, b) => {60 const x =61 typeof a[firstKey][secondKey] === 'string'62 ? a[firstKey][secondKey].toString().toLowerCase()63 : parseFloat(a[firstKey][secondKey])64 const y =65 typeof b[firstKey][secondKey] === 'string'66 ? b[firstKey][secondKey].toString().toLowerCase()67 : parseFloat(b[firstKey][secondKey])68 if (x < y) {69 return 170 }71 if (x > y) {72 return -173 }74 return 075 }...`

Using AI Code Generation

`1var bestBook = new BestBook();2console.log(bestBook.firstKey());3console.log(bestBook.secondKey());4console.log(bestBook.thirdKey());5console.log(bestBook.fourthKey());6console.log(bestBook.fifthKey());7var BestBook = function() {8 var book = {9 };10 this.firstKey = function() {11 return Object.keys(book)[0];12 };13 this.secondKey = function() {14 return Object.keys(book)[1];15 };16 this.thirdKey = function() {17 return Object.keys(book)[2];18 };19 this.fourthKey = function() {20 return Object.keys(book)[3];21 };22 this.fifthKey = function() {23 return Object.keys(book)[4];24 };25};26var BestBook = function() {27 var book = {28 };29 this.firstKey = function() {30 return Object.keys(book)[0];31 };`

Using AI Code Generation

`1var BestBuy = require('./BestBuy.js');2var bestbuy = new BestBuy();3console.log(bestbuy.firstKey());4console.log(bestbuy.lastKey());5function BestBuy() {6 this.products = {7 };8 this.firstKey = function() {9 var firstKey = Object.keys(this.products)[0];10 return firstKey;11 };12 this.lastKey = function() {13 var lastKey = Object.keys(this.products)[Object.keys(this.products).length - 1];14 return lastKey;15 };16}17module.exports = BestBuy;18JavaScript Object.keys() Method19JavaScript Object.values() Method20JavaScript Object.entries() Method21JavaScript Object.getOwnPropertyNames() Method22JavaScript Object.getOwnPropertySymbols() Method23JavaScript Object.is() Method24JavaScript Object.isExtensible() Method25JavaScript Object.isFrozen() Method26JavaScript Object.isSealed() Method27JavaScript Object.preventExtensions() Method28JavaScript Object.seal() Method29JavaScript Object.freeze() Method`

Using AI Code Generation

`1var BestRestaurant = require('./bestRestaurant');2var bestRestaurant = new BestRestaurant();3var firstKey = bestRestaurant.firstKey();4console.log(firstKey);5var BestRestaurant = function() {6 this.bestRestaurant = {7 };8};9BestRestaurant.prototype.firstKey = function() {10 for (var key in this.bestRestaurant) {11 return key;12 }13};14module.exports = BestRestaurant;15module.exports = BestRestaurant;16module.exports.firstKey = BestRestaurant.prototype.firstKey;`

Using AI Code Generation

`1var firstKey = require('best-library').firstKey;2var obj = {a: 1, b: 2};3var secondKey = require('best-library').secondKey;4var obj = {a: 1, b: 2};5var thirdKey = require('best-library').thirdKey;6var obj = {a: 1, b: 2, c: 3};7var fourthKey = require('best-library').fourthKey;8var obj = {a: 1, b: 2, c: 3, d: 4};9var fifthKey = require('best-library').fifthKey;10var obj = {a: 1, b: 2, c: 3, d: 4, e: 5};11var sixthKey = require('best-library').sixthKey;12var obj = {a: 1, b: 2, c: 3, d: 4, e: 5, f: 6};13var seventhKey = require('best-library').seventhKey;14var obj = {a: 1, b: 2, c: 3, d: 4, e: 5, f: 6, g: 7};`

Using AI Code Generation

`1var BestBuyAPI = require('bestbuyapi');2var bestbuy = new BestBuyAPI('yourapikey');3bestbuy.firstKey('products', 'categoryPath.id=abcat0502000', function(err, data) {4 console.log(data);5});6var BestBuyAPI = require('bestbuyapi');7var bestbuy = new BestBuyAPI('yourapikey');8bestbuy.firstKey('products', 'categoryPath.id=abcat0502000', function(err, data) {9 console.log(data);10});11var BestBuyAPI = require('bestbuyapi');12var bestbuy = new BestBuyAPI('yourapikey');13bestbuy.firstKey('products', 'categoryPath.id=abcat0502000', function(err, data) {14 console.log(data);15});16var BestBuyAPI = require('bestbuyapi');17var bestbuy = new BestBuyAPI('yourapikey');18bestbuy.firstKey('products', 'categoryPath.id=abcat0502000', function(err, data) {19 console.log(data);20});21var BestBuyAPI = require('bestbuyapi');22var bestbuy = new BestBuyAPI('yourapikey');23bestbuy.firstKey('products', 'categoryPath.id=abcat0502000', function(err, data) {24 console.log(data);25});26var BestBuyAPI = require('bestbuyapi');27var bestbuy = new BestBuyAPI('yourapikey');28bestbuy.firstKey('products', 'categoryPath.id=abcat0502000', function(err, data) {29 console.log(data);30});31var BestBuyAPI = require('bestbuyapi');32var bestbuy = new BestBuyAPI('yourapikey');33bestbuy.firstKey('products', 'categoryPath.id=abcat0502000', function(err, data) {34 console.log(data);35});`

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