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1. 1

   function copyWithin (array, startPasting, startCopying, endCopying) {

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             // no arguments passed in

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             if (arguments.length === 0) {

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               throw new TypeError('undefined is not an array');

2. 1

   // I find it useful to read expr1 && expr2 as "if expr1 is true, than expr2"

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   // By definition, expr1 && expr2 returns expr2 if expr1 can be converted to true; otherwise, it returns expr2. 

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   // Seeing things through an if statement helps me build this sort of mental shortcut.

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   function and(expr1, expr2) {

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     if (Boolean(expr1) === true) {

3. Clone of Keyzen repo (link in README). App =>

   JavaScript

4. Forked from scripting/myWordEditor

   A simple silo-free blogging tool that creates beautiful essay pages.

   JavaScript

5. Firefox DevTools UX Community

   103 20

6. sito web corso base ux ui design

   JavaScript