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https://patch-diff.githubusercontent.com/Akshayprmar/123-Essential-JavaScript-Interview-Questions#123-javascript-interview-questions
https://patch-diff.githubusercontent.com/Akshayprmar/123-Essential-JavaScript-Interview-Questions#want-to-buy-a-book-in-paper-form-want-some-badass-flashcards
Google Formhttps://goo.gl/forms/c8ubV1tWBBdz6fJP2
Yuri's JavaScript Flashcardshttp://flashcardsjs.com
https://patch-diff.githubusercontent.com/Akshayprmar/123-Essential-JavaScript-Interview-Questions#question-1-whats-the-difference-between-undefined-and-not-defined-in-javascript
https://patch-diff.githubusercontent.com/Akshayprmar/123-Essential-JavaScript-Interview-Questions#ref-link
http://stackoverflow.com/questions/20822022/javascript-variable-definition-declarationhttp://stackoverflow.com/questions/20822022/javascript-variable-definition-declaration
https://patch-diff.githubusercontent.com/Akshayprmar/123-Essential-JavaScript-Interview-Questions#question-2-for-which-value-of-x-the-results-of-the-following-statements-are-not-the-same
https://patch-diff.githubusercontent.com/Akshayprmar/123-Essential-JavaScript-Interview-Questions#question-3-what-is-the-drawback-of-declaring-methods-directly-in-javascript-objects
https://patch-diff.githubusercontent.com/Akshayprmar/123-Essential-JavaScript-Interview-Questions#question-4-what-is-closure-in-javascript-can-you-provide-an-example
https://patch-diff.githubusercontent.com/Akshayprmar/123-Essential-JavaScript-Interview-Questions#question-5-write-a-mul-function-which-will-work-properly-when-invoked-with-following-syntax
https://patch-diff.githubusercontent.com/Akshayprmar/123-Essential-JavaScript-Interview-Questions#question-6-how-to-empty-an-array-in-javascript
https://patch-diff.githubusercontent.com/Akshayprmar/123-Essential-JavaScript-Interview-Questions#method-1
https://patch-diff.githubusercontent.com/Akshayprmar/123-Essential-JavaScript-Interview-Questions#method-2
https://patch-diff.githubusercontent.com/Akshayprmar/123-Essential-JavaScript-Interview-Questions#method-3
https://patch-diff.githubusercontent.com/Akshayprmar/123-Essential-JavaScript-Interview-Questions#method-4
https://patch-diff.githubusercontent.com/Akshayprmar/123-Essential-JavaScript-Interview-Questions#question-7-how-to-check-if-an-object-is-an-array-or-not
https://patch-diff.githubusercontent.com/Akshayprmar/123-Essential-JavaScript-Interview-Questions#question-8-what-will-be-the-output-of-the-following-code
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https://patch-diff.githubusercontent.com/Akshayprmar/123-Essential-JavaScript-Interview-Questions#question-20-whats-the-difference-between-typeof-and-instanceof
http://stackoverflow.com/questions/2449254/what-is-the-instanceof-operator-in-javascripthttp://stackoverflow.com/questions/2449254/what-is-the-instanceof-operator-in-javascript
https://patch-diff.githubusercontent.com/Akshayprmar/123-Essential-JavaScript-Interview-Questions#question-21-calculate-the-length-of-the-associative-array
https://patch-diff.githubusercontent.com/Akshayprmar/123-Essential-JavaScript-Interview-Questions#method-1-1
https://patch-diff.githubusercontent.com/Akshayprmar/123-Essential-JavaScript-Interview-Questions#method-2-1
https://patch-diff.githubusercontent.com/Akshayprmar/123-Essential-JavaScript-Interview-Questions#method-3-1
getOwnPropertyNameshttps://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/Object/getOwnPropertyNames
https://patch-diff.githubusercontent.com/Akshayprmar/123-Essential-JavaScript-Interview-Questions#method-4-1
Underscorehttps://underscorejs.org/#size
lodashhttps://lodash.com/docs/4.17.10#size
https://patch-diff.githubusercontent.com/Akshayprmar/123-Essential-JavaScript-Interview-Questions#question-22-difference-between-function-method-and-constructor-calls-in-javascript
https://patch-diff.githubusercontent.com/Akshayprmar/123-Essential-JavaScript-Interview-Questions#question-23-what-would-be-the-output-of-the-following-code
ECMAScript Specificationhttp://www.ecma-international.org/ecma-262/6.0/#sec-assignment-operators-runtime-semantics-evaluation
https://patch-diff.githubusercontent.com/Akshayprmar/123-Essential-JavaScript-Interview-Questions#question-24-what-are-service-workers-and-when-can-you-use-them
https://patch-diff.githubusercontent.com/Akshayprmar/123-Essential-JavaScript-Interview-Questions#question-25-what-is-the-difference-between-a-method-and-a-function-in-javascript
https://patch-diff.githubusercontent.com/Akshayprmar/123-Essential-JavaScript-Interview-Questions#example-1
https://patch-diff.githubusercontent.com/Akshayprmar/123-Essential-JavaScript-Interview-Questions#example-2
https://patch-diff.githubusercontent.com/Akshayprmar/123-Essential-JavaScript-Interview-Questions#question-26-what-is-iife-immediately-invoked-function-expression-and-how-it-can-be-useful
https://patch-diff.githubusercontent.com/Akshayprmar/123-Essential-JavaScript-Interview-Questions#definition
https://patch-diff.githubusercontent.com/Akshayprmar/123-Essential-JavaScript-Interview-Questions#explanation
https://patch-diff.githubusercontent.com/Akshayprmar/123-Essential-JavaScript-Interview-Questions#applications-and-usefulness
https://patch-diff.githubusercontent.com/Akshayprmar/123-Essential-JavaScript-Interview-Questions#question-27-describe-singleton-pattern-in-javascript
https://patch-diff.githubusercontent.com/Akshayprmar/123-Essential-JavaScript-Interview-Questions#singleton-design-pattern-implementation
https://patch-diff.githubusercontent.com/Akshayprmar/123-Essential-JavaScript-Interview-Questions#question-28-what-are-the-ways-of-creating-objects-in-javascript-
https://patch-diff.githubusercontent.com/Akshayprmar/123-Essential-JavaScript-Interview-Questions#method-1-function-based
https://patch-diff.githubusercontent.com/Akshayprmar/123-Essential-JavaScript-Interview-Questions#method-2-object-literal
https://patch-diff.githubusercontent.com/Akshayprmar/123-Essential-JavaScript-Interview-Questions#method-3-from-object-using-new-keyword
https://patch-diff.githubusercontent.com/Akshayprmar/123-Essential-JavaScript-Interview-Questions#method-4-using-objectcreate
https://patch-diff.githubusercontent.com/Akshayprmar/123-Essential-JavaScript-Interview-Questions#question-29-write-a-function-called-deepclone-which-takes-an-object-and-creates-a-object-copy-of-it
https://patch-diff.githubusercontent.com/Akshayprmar/123-Essential-JavaScript-Interview-Questions#question-30-best-way-to-detect-undefined-object-property-in-javascript
https://patch-diff.githubusercontent.com/Akshayprmar/123-Essential-JavaScript-Interview-Questions#question-31-write-a-function-called-clone-which-takes-an-object-and-creates-a-object-copy-of-it-but-not-copy-deep-property-of-object
https://patch-diff.githubusercontent.com/Akshayprmar/123-Essential-JavaScript-Interview-Questions#question-32-what-are-promises-and-how-they-are-useful
one of the articles on a topichttps://opensourceconnections.com/blog/2014/02/16/a-simple-promise-implementation-in-about-20-lines-of-javascript/
simplest promise implementationhttps://gist.github.com/softwaredoug/9044640
https://patch-diff.githubusercontent.com/Akshayprmar/123-Essential-JavaScript-Interview-Questions#question-33-how-to-check-whether-a-key-exist-in-a-javascript-object-or-not
https://patch-diff.githubusercontent.com/Akshayprmar/123-Essential-JavaScript-Interview-Questions#question-34-what-is-nan-why-do-we-need-it-and-when-can-it-break-the-page
great blogpost on ariya.iohttps://ariya.io/2014/05/the-curious-case-of-javascript-nan
https://patch-diff.githubusercontent.com/Akshayprmar/123-Essential-JavaScript-Interview-Questions#question-35-fix-the-bug-using-es5-only
https://patch-diff.githubusercontent.com/Akshayprmar/123-Essential-JavaScript-Interview-Questions#question-36-how-to-check-if-the-value-of-a-variable-in-an-array
https://patch-diff.githubusercontent.com/Akshayprmar/123-Essential-JavaScript-Interview-Questions#question-37-best-way-to-detect-reference-values-of-any-type-in-javascript-
https://patch-diff.githubusercontent.com/Akshayprmar/123-Essential-JavaScript-Interview-Questions#question-38-how-does-objectcreate-method-works-javascript
https://patch-diff.githubusercontent.com/Akshayprmar/123-Essential-JavaScript-Interview-Questions#question-39-how-to-use-constructor-functions-for-inheritance-in-javascript
https://patch-diff.githubusercontent.com/Akshayprmar/123-Essential-JavaScript-Interview-Questions#question-40-how-we-can-prevent-modification-of-object-in-javascript-
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