String.prototype.replace is an existing method that allows us to replace a pattern in a string with something else. One

But once you untether, you also make the experience entirely solitary. No more national Who Killed JR? conversations; no communal groaning at the finale of St. Elsewhere; no office pools on the outcome of Lost. I miss that. Even though watching television has always been a housebound activity, it felt public when we all watched the same things at the same time. Now, like everything else we do, it floats in some milky ether, timeless. For instance, I’m currently watching The Leftovers, long after anyone else I know is watching it, and they’re all talked out about it by now. Damn.

// short new Intl.DateTimeFormat('en' , { dateStyle: 'short' }).format(Date.now()) // '11/19/20' // medium new Intl.DateTimeFormat('en' , { dateStyle: 'medium' }).format(Date.now()) // 'Nov 19, 2020' // long new Intl.DateTimeFormat('en' , { dateStyle: 'long' }).format(Date.now()) // 'November 19, 2020'

// IIFE function to print the object after 3 secs (async function(){ await new Promise((resolve) => { setTimeout(() => { callback(); // {name: 'Harsha'} resolve(); }, 3000); }); })();

// short new Intl.DateTimeFormat('en' , { timeStyle: 'short' }).format(Date.now()) // '6:35 PM' // medium new Intl.DateTimeFormat('en' , { timeStyle: 'medium' }).format(Date.now()) // '6:35:13 PM' // long new Intl.DateTimeFormat('en' , { timeStyle: 'long' }).format(Date.now()) // '6:35:55 PM GMT 5:30'

This method is different from Promise.race because with race, the promise short-circuits once when one of the given promises resolves or rejects, but here it resolves if any of the promises are fulfilled and it is rejected only if all the promises are rejected.

// short new Intl.DateTimeFormat('en' , { dateStyle: 'short' }).format(Date.now()) // '11/19/20' // medium new Intl.DateTimeFormat('en' , { dateStyle: 'medium' }).format(Date.now()) // 'Nov 19, 2020' // long new Intl.DateTimeFormat('en' , { dateStyle: 'long' }).format(Date.now()) // 'November 19, 2020'

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in today’s time has to be influenced by how expensive or cheap the stock market is as well as the level of future inflation the market expects. In fact, the cheaper the stock market is the higher the expected returns it is expected to achieve and the higher the safe withdrawal rate is. Bill Bengen says that, based on today’s conditions, new retirees should be safe if they start with a withdrawal rate of no more than 5%. As stated above, this compares with an average of safe withdrawal of 7% given stocks and bonds are currently not cheap.

The above example might seem complicated. But, it is actually simple. The code basically calls a callback function after 3 seconds, where the function prints an object. Whenever we call the callback function, the obj is still present in the memory. To manage cache efficiently we can use WeakRef .

?? is also known as the Nullish Coalescing operator, which checks if the value is null or undefined. a ??= b will return b if a is null or undefined, or it’ll return b . In other words, it assign RHS variable value to LHS variable, only if LHS value is null or undefined.

Promise.any() method takes in a list of promises and returns a value, as soon as it hits the first resolved promise from the list. If all the promises are rejected then it will throw an AggregatedError message.

The Intl.ListFormat object is a constructor for objects that enable language-sensitive list formatting. It takes in two parameters — the first parameter is locale and second parameter is an options object that has two properties — style and type. Having a look at an example will be easier than explaining in words:

I would really like to discuss the final episode of The Undoing. But what I really want to discuss is how much I like watching television as part of a herd. The advantages of being able to watch anything, anytime, anywhere, are myriad, obviously. Being tethered to a broadcast schedule is frustrating, impractical, anachronistic, I know, I know, I know. First with VCRs and now with streaming, we liberated ourselves from the era in which you had to squint and read the TV Guide, running your finger anxiously up and down the grid to make sure you knew when your show was on.

Here in WeakRef the reference is read using deref() method. The value will be printed the first time, and for the second time there is no guarantee that it’ll be printed, as it might have been cleaned by the GC.

Since JavaScript is a garbage collected language, if a variable is no longer reachable, the GC automatically removes it. As a good practice, we would not want to keep a lot in memory for a long time. We can allow the memory to be garbage collected and later if we need it again, we can generate a fresh cache.

// IIFE function to print the object after 2 and 5 secs (async function(){ await new Promise((resolve) => { setTimeout(() => { callback(); // Guaranteed to print 'Harsha' resolve(); }, 2000); }); await new Promise((resolve) => { setTimeout(() => { callback(); // No Gaurantee that 'Harsha' is printed resolve(); }, 5000); }); })();