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Everything you need to know about VAR
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Everything you need to know about LET
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Constant
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TDZ: Temporal Dead Zone
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Real-life application of LET
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Who has the highest priority? Variable name, function name or argument name?
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Arguments, caller, callee
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Three ways to redirecting THIS of a funciton
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Higher-order function and currying
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Currying and closure
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Closure
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Real-life application of Closure
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Syntax of arrow function
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THIS in an arrow function
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Application of arrow function
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Destructure array
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Destructure object
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Destructure string
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Destructure number, boolean, null and undefined
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Destructure function arguments
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Map basics
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Iterate over MAP using FOR OF
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SET basics
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Application of SET
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Introduction to Symbol
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How to create a Symbol value
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Symbol.for()
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Use Symbol value as the property name
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Well-known Symbol
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The iteration protocol: the iterable protocol and the iterator protocol
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Create your own iterator
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Generator
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Application of generator
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The next() method
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yield *
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Introduction to Promise
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The Promise constructor
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The application of Promise
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The then_able object
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Promise.resolve() and Promise.reject()
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Limits of Promise.resolve() and Promise.reject()
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Process several promises together: .all(), .allSettled() and .race()
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async await
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async await: supplement
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Reflect and its methods
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What is Proxy
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Create private properties using the GET trap
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The SET trap
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The has and deleteProperty trap
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Use a proxy object as the prototype
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The defineProperty trap
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The apply trap
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The constructor trap
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Revocable proxy
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Real-life Application
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JSON
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Introduction to CommonJS
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The mechanism of CommonJS: the module object
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Circular dependency
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How CommonJS handles cache: require.cache
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ES6 import and export
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How to 'import'
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Named export
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Default export
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The difference between named export and dynamic export: dynamic reference
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Use ESM in browser
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How to enable the strict mode
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Changes brought by the strict mode
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__proto__
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The prototype property of a constructor
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How our own constructor uses the prototype chain
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Real-life application of prototype chain
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Introduction to the Object constructor
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Object.values(), Object.keys(), Object.entries(), Object.is()
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Object.setPrototypeOf() and Object.assign()
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Object.create() Part 1
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Object.create() Part 2
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Property attributes
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The descriptor object
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Create properties with customized attributes
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Object.preventExtensions()
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Object.seal()
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Object.freeze()
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Getter and Setter introduction
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Create accessors using Object.defineProperty()
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Two-way data binding using getter and setter
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How to define your own constructor function
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Prototype and static properties and methods
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Review, comparison and summary
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Private properties in constructors
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How to define getter and setter in a constructor
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Class introduction
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How to define properties
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How to define methods: instance, prototype and static
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Fields
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Private properties in classes
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Extend properties
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Extend methods
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Application: extending the Array() constructor
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static get [Symbol.species]
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new.target: control the instantiation location
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Make the parent class 'un-newable'
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Mixin
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Data structure: Queue, Stack, and Heap
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Thread and Process, sync and async, blocking and non-blocking
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Recursion and stack overflow
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Macro tasks, micro tasks, and their queues
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Event loop, micro task queue, macro task queue
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Interview challenges: predict the result of the following programs
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process.nextTick()
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What is tail call optimization
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Real-life application of tail call optimization
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Encapsulation, inheritance, polymorphism
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Differences between a primitive prop. value and a reference-type prop. value
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Douglas Crawford's program: recreate Object.create()
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The creative combination of a constructor and the call or apply method
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The genius combination of two constructors
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"Parasitic" inheritance
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instanceof and typeof
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'"Shallow" copy an object
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"Deep" copy an object
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"Deep" assign an object into another one
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JavaScript garbage collection and memory leak
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Circular reference, reference counting and mark and sweep
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Bit, byte, word, memory address and byte addressing
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Basic encoding knowledge
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Memory address and byte addressing
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Bit width
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Array basics
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How does an array affect THIS in a function or method
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Concatenate two arrays, operating the first and last element
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Remove duplicated elements using two methods
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Check the entire array and find the matching element
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How to remove and replace designated elements and retrieve an array segment
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How to find the max and min element and how to reorganize array elements
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Array with "holes"
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String basics
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Calculating word count using the split() method
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Extract a section of a string
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Replace a section of a string
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Highlight selected texts
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Data types in JavaScript
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Type coercion, wrapper object, explicit and implicit typecasting
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Compare NULL, undefined, and NaN
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The problems with typeof and instanceof
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Create a data type checker by combining typeof and instanceof
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Checking data type using the constructor property
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Checking data type using the toString method and the call or apply method
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Scope chain and closure
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Lexical scoping vs. dynamic scoping
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Switching two variable values without creating a new variable
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Count how many times each character of a string has been used
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Find the most and least frequently used character
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Count words
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Find the most and least frequently words
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Bubble sorting introduction
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Bubble sorting application
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Bubble sort "backwards"
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Reorganize array elements in ascending and descending order using bubble sorting
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Improve the bubble sorting program by ending the loop at the earliest timing
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The problem with the inner FOR loop
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Avoid unnecessary comparisons using rightSortBorder
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LeftSortBorder: avoiding unnecessary comparisons while iterating backwards
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Cocktail sorting
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Add the left and right sort border to avoid unnecessary comparisons
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Quick sorting introduction
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Quick sorting demo
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Counting sorting introduction
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Deal with duplicated elements
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Improve efficiency Part 1
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Improve efficiency Part 2
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Insertion sorting introduction
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Insertion sort demo
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Bucket sorting introduction
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Bucket sorting demo
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Selection sort introduction
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Selection sort demo
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Time and space complexity: big O notation
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Linear structures and how they are stored in memory
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Non-linear data structure
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How to realize binary heap in JavaScript
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Realize the binary heap structure using JavaScript codes
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The heap sorting algorithm intro
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The heap sorting algorithm demo
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Introduction to the Observer pattern
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Managing several page elements using the Observer pattern
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Two-way data binding using the Observer pattern
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The two "shocking" forms of FOR loop
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Challenge: iterating over the array backwards