Can (a== 1 && a ==2 && a==3) ever evaluate to true?
Moderator note: Please resist the urge to edit the code or remove this notice. The pattern of whitespace may be part of the question and therefore should not be tampered with unnecessarily. If you are in the "whitespace is insignificant" camp, you should be able to accept the code as is. Is it ever possible that (a== 1 && a ==2 && a==3) could evaluate to true in JavaScript? This is an interview qu
"can't create duplicate variable that shadows a global property"
Getting this error on Safari 10 Happens when a const is given a name that's exactly the same as an id of any element on the page. const abc = document.querySelector("#abc"); //err const abz = document.querySelector("#abc"); //no err var abc = document.querySelector("#abc"); //no err Is there a reason for this? I know you can access the elements via window.abc, is that part of the why? Test: <!doct
How to initialize an array's length in JavaScript?
Most of the tutorials that I've read on arrays in JavaScript (including w3schools and devguru) suggest that you can initialize an array with a certain length by passing an integer to the Array constructor using the var test = new Array(4); syntax. After using this syntax liberally in my js files, I ran one of the files through jsLint, and it freaked out: Error: Problem at line 1 character 22: Expe
Using async/await with a forEach loop
Are there any issues with using async/await in a forEach loop? I'm trying to loop through an array of files and await on the contents of each file. import fs from 'fs-promise' async function printFiles () { const files = await getFilePaths() // Assume this works fine files.forEach(async (file) => { const contents = await fs.readFile(file, 'utf8') console.log(contents) }) } printFiles() This code d
How to pass props to {this.props.children}
I'm trying to find the proper way to define some components which could be used in a generic way: <Parent> <Child value="1"> <Child value="2"> </Parent> There is a logic going on for rendering between parent and children components of course, you can imagine <select> and <option> as an example of this logic. This is a dummy implementation for the purpose of the question: var Parent = React.createC
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