qns: de-duplicate questions

Author: yangshun

README.md

@@ -1,13 +1,16 @@
 {
   "Data Types & Variables": [
-    "what-are-the-primitive-data-types-in-javascript",
+    "what-are-the-various-data-types-in-javascript",
     "how-do-you-check-the-data-type-of-a-variable",
+    "whats-the-difference-between-a-variable-that-is-null-undefined-or-undeclared-how-would-you-go-about-checking-for-any-of-these-states",
+    "what-are-the-differences-between-variables-created-using-let-var-or-const",
+    "why-is-it-in-general-a-good-idea-to-leave-the-global-scope-of-a-website-as-is-and-never-touch-it",
+    "how-do-you-convert-a-string-to-a-number-in-javascript",
     "what-are-template-literals-and-how-are-they-used",
     "explain-the-concept-of-tagged-templates",
     "what-is-the-spread-operator-and-how-is-it-used",
-    "what-is-the-difference-between-null-and-undefined",
-    "how-do-you-convert-a-string-to-a-number-in-javascript",
-    "what-are-global-variables-and-why-are-they-generally-avoided"
+    "what-are-symbols-used-for",
+    "what-are-proxies-in-javascript-used-for"
   ],
   "Hoisting": [
     "explain-hoisting",
@@ -17,32 +20,33 @@
     "how-can-you-avoid-problems-related-to-hoisting"
   ],
   "Operators & Control Flow": [
-    "explain-the-difference-between-the-double-equal-and-triple-equal-operators",
-    "what-are-the-different-types-of-loops-in-javascript",
+    "what-is-the-difference-between-double-equal-and-triple-equal",
+    "what-language-constructs-do-you-use-for-iterating-over-object-properties-and-array-items",
     "what-is-the-purpose-of-the-break-and-continue-statements",
     "what-is-the-ternary-operator-and-how-is-it-used",
-    "what-is-the-difference-between-forin-and-forof-loops",
     "how-do-you-access-the-index-of-an-element-in-an-array-during-iteration",
     "what-is-the-purpose-of-the-switch-statement",
     "what-are-rest-parameters-and-how-are-they-used",
     "explain-the-concept-of-the-spread-operator-and-its-uses",
-    "what-are-the-benefits-of-using-spread-syntax-and-how-is-it-different-from-rest-syntax"
+    "what-are-the-benefits-of-using-spread-syntax-and-how-is-it-different-from-rest-syntax",
+    "what-are-iterators-and-generators-and-what-are-they-used-for"
   ],
   "Functions": [
     "explain-the-differences-on-the-usage-of-foo-between-function-foo-and-var-foo-function",
-    "explain-the-difference-between-global-scope-function-scope-and-block-scope",
-    "explain-the-concept-of-scope-in-javascript",
     "what-is-the-difference-between-a-parameter-and-an-argument",
     "explain-the-concept-of-hoisting-with-regards-to-functions",
-    "what-are-arrow-functions-and-how-do-they-differ-from-regular-functions",
+    "whats-the-difference-between-call-and-apply",
+    "can-you-offer-a-use-case-for-the-new-arrow-function-syntax-how-does-this-new-syntax-differ-from-other-functions",
     "difference-between-function-person-var-person-person-and-var-person-new-person",
-    "explain-the-concept-of-higher-order-functions",
+    "what-is-the-definition-of-a-higher-order-function",
     "what-are-callback-functions-and-how-are-they-used",
+    "whats-a-typical-use-case-for-anonymous-functions",
     "what-is-recursion-and-how-is-it-used-in-javascript",
-    "what-are-default-parameters-and-how-are-they-used"
+    "what-are-default-parameters-and-how-are-they-used",
+    "explain-why-the-following-doesnt-work-as-an-iife-function-foo--what-needs-to-be-changed-to-properly-make-it-an-iife"
   ],
   "Objects & Arrays": [
-    "what-are-the-different-ways-to-create-an-object-in-javascript",
+    "what-are-the-various-ways-to-create-objects-in-javascript",
     "explain-the-difference-between-dot-notation-and-bracket-notation-for-accessing-object-properties",
     "what-are-the-different-methods-for-iterating-over-an-array",
     "how-do-you-add-remove-and-update-elements-in-an-array",
@@ -60,19 +64,18 @@
     "how-do-you-reliably-determine-whether-an-object-is-empty"
   ],
   "Asynchronous JavaScript": [
+    "what-is-event-loop-what-is-the-difference-between-call-stack-and-task-queue",
     "explain-the-difference-between-synchronous-and-asynchronous-functions",
     "explain-the-concept-of-a-callback-function-in-asynchronous-operations",
     "what-are-promises-and-how-do-they-work",
     "explain-the-different-states-of-a-promise",
-    "what-are-the-advantages-of-using-promises-over-callbacks",
+    "what-are-the-pros-and-cons-of-using-promises-instead-of-callbacks",
     "what-is-the-use-of-promiseall",
     "how-is-promiseall-different-from-promiseallsettled",
     "what-is-asyncawait-and-how-does-it-simplify-asynchronous-code",
     "how-do-you-handle-errors-in-asynchronous-operations",
-    "what-is-the-event-loop-and-how-does-it-relate-to-asynchronous-javascript",
     "explain-the-concept-of-a-microtask-queue",
-    "what-is-the-difference-between-settimeout-setimmediate-and-processnexttick",
-    "what-are-the-different-ways-to-make-an-api-call-in-javascript"
+    "what-is-the-difference-between-settimeout-setimmediate-and-processnexttick"
   ],
   "Prototypes & Inheritance": [
     "explain-how-prototypal-inheritance-works",
@@ -81,25 +84,28 @@
     "explain-the-concept-of-inheritance-in-es2015-classes",
     "what-is-the-purpose-of-the-new-keyword",
     "how-do-you-create-a-constructor-function",
-    "explain-the-concept-of-classes-in-es2015-and-how-they-differ-from-constructor-functions",
-    "what-are-static-methods-in-classes"
+    "what-are-the-differences-between-es6-class-and-es5-function-constructors",
+    "what-advantage-is-there-for-using-the-arrow-syntax-for-a-method-in-a-constructor",
+    "why-you-might-want-to-create-static-class-members"
   ],
   "Closures & Scope": [
     "what-is-a-closure-and-how-why-would-you-use-one",
     "explain-the-concept-of-lexical-scoping",
+    "explain-the-concept-of-scope-in-javascript",
     "how-can-closures-be-used-to-create-private-variables",
     "what-are-the-potential-pitfalls-of-using-closures",
     "explain-the-difference-between-global-scope-function-scope-and-block-scope"
   ],
   "This Keyword": [
     "explain-how-this-works-in-javascript",
+    "explain-function-prototype-bind",
     "explain-the-different-ways-the-this-keyword-can-be-bound",
-    "how-does-the-this-keyword-behave-in-arrow-functions",
     "what-are-the-common-pitfalls-of-using-the-this-keyword",
     "explain-the-concept-of-this-binding-in-event-handlers"
   ],
   "DOM Manipulation & Events": [
     "what-is-the-dom-and-how-is-it-structured",
+    "whats-the-difference-between-an-attribute-and-a-property",
     "explain-the-difference-between-documentqueryselector-and-documentgetelementbyid",
     "how-do-you-add-remove-and-modify-html-elements-using-javascript",
     "what-are-event-listeners-and-how-are-they-used",
@@ -109,6 +115,7 @@
     "explain-event-delegation",
     "how-do-you-prevent-the-default-behavior-of-an-event",
     "what-is-the-difference-between-eventpreventdefault-and-eventstoppropagation",
+    "what-is-the-difference-between-mouseenter-and-mouseover-event",
     "what-is-the-difference-between-innerhtml-and-textcontent",
     "how-do-you-manipulate-css-styles-using-javascript"
   ],
@@ -117,27 +124,34 @@
     "what-is-the-difference-between-the-window-object-and-the-document-object",
     "describe-the-difference-between-a-cookie-sessionstorage-and-localstorage",
     "how-do-you-make-an-http-request-using-the-fetch-api",
-    "what-are-web-workers-and-how-can-they-be-used",
+    "what-are-the-different-ways-to-make-an-api-call-in-javascript",
+    "explain-ajax-in-as-much-detail-as-possible",
+    "what-are-the-advantages-and-disadvantages-of-using-ajax",
+    "what-are-the-differences-between-xmlhttprequest-and-fetch",
+    "how-do-you-abort-a-web-request-using-abortcontrollers",
+    "explain-how-jsonp-works-and-how-its-not-really-ajax",
+    "what-are-workers-in-javascript-used-for",
     "explain-the-concept-of-the-web-socket-api",
-    "what-are-polyfills-used-for",
+    "what-are-javascript-polyfills-for",
     "how-do-you-detect-if-javascript-is-disabled-on-a-page",
     "what-is-the-intl-namespace-object-for",
     "how-do-you-validate-form-elements-using-the-constraint-validation-api",
     "how-do-you-use-windowhistory-api",
     "how-do-iframe-on-a-page-communicate",
-    "how-do-you-cancel-a-fetch-request",
     "difference-between-document-load-event-and-document-domcontentloaded-event",
     "how-do-you-redirect-to-a-new-page-in-javascript",
     "how-do-you-get-the-query-string-values-of-the-current-page-in-javascript",
+    "what-are-server-sent-events",
     "what-are-progressive-web-applications-pwas"
   ],
   "Modules": [
     "what-are-modules-and-why-are-they-useful",
-    "explain-the-difference-between-commonjs-and-es-modules",
+    "explain-the-differences-between-commonjs-modules-and-es-modules",
     "how-do-you-import-and-export-modules-in-javascript",
     "what-are-the-benefits-of-using-a-module-bundler",
     "explain-the-concept-of-tree-shaking-in-module-bundling",
-    "what-are-the-metadata-fields-of-a-module"
+    "what-are-the-metadata-fields-of-a-module",
+    "what-do-you-think-of-amd-vs-commonjs"
   ],
   "Error Handling": [
     "what-are-the-different-types-of-errors-in-javascript",
@@ -155,9 +169,9 @@
   ],
   "Sets & Maps": [
     "what-are-sets-and-maps-and-how-are-they-used",
-    "how-do-maps-in-javascript-differ-from-objects",
-    "what-are-some-use-cases-for-using-a-weakset-or-weakmap-in-javascript",
+    "what-are-the-differences-between-map-set-and-weakmap-weakset",
     "how-do-you-convert-a-set-to-an-array-in-javascript",
+    "what-is-the-difference-between-a-map-object-and-a-plain-object-in-javascript",
     "how-do-sets-and-maps-handle-equality-checks-for-objects"
   ],
   "Performance Optimization": [
@@ -192,7 +206,8 @@
     "explain-the-concept-of-the-prototype-pattern",
     "what-is-the-decorator-pattern-and-how-is-it-used",
     "explain-the-concept-of-the-strategy-pattern",
-    "what-is-the-command-pattern-and-how-is-it-used"
+    "what-is-the-command-pattern-and-how-is-it-used",
+    "why-is-extending-built-in-javascript-objects-not-a-good-idea"
   ],
   "Security": [
     "what-is-cross-site-scripting-xss-and-how-can-you-prevent-it",
@@ -204,6 +219,17 @@
     "how-can-you-prevent-clickjacking-attacks",
     "explain-the-concept-of-input-validation-and-its-importance-in-security",
     "what-are-some-tools-and-techniques-for-identifying-security-vulnerabilities-in-javascript-code",
-    "how-can-you-implement-secure-authentication-and-authorization-in-javascript-applications"
+    "how-can-you-implement-secure-authentication-and-authorization-in-javascript-applications",
+    "explain-the-same-origin-policy-with-regards-to-javascript"
+  ],
+  "Misc": [
+    "what-is-use-strict-what-are-the-advantages-and-disadvantages-to-using-it",
+    "what-tools-and-techniques-do-you-use-for-debugging-javascript-code",
+    "how-does-javascript-garbage-collection-work",
+    "explain-what-a-single-page-app-is-and-how-to-make-one-seo-friendly",
+    "how-can-you-share-code-between-files",
+    "how-do-you-organize-your-code-module-pattern-classical-inheritance",
+    "what-are-some-of-the-advantages-disadvantages-of-writing-javascript-code-in-a-language-that-compiles-to-javascript",
+    "when-would-you-use-document-write"
   ]
 }