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Check synchronously if file/directory exists in Node.js
...t the top, followed by the various answers over the years in chronological order:
Current Answer
You can use fs.existsSync():
const fs = require("fs"); // Or `import fs from "fs";` with ESM
if (fs.existsSync(path)) {
// Do something
}
It was deprecated for several years, but no longer is. F...
How to add onload event to a div element
...d of the html document just before the </body> tag? If yes, does the order in which they're written matter?
– Neo
Oct 10 '17 at 9:34
...
How do I update a GitHub forked repository?
...rebased your branch onto upstream/master you may need to force the push in order to push it to your own forked repository on GitHub. You'd do that with:
git push -f origin master
You only need to use the -f the first time after you've rebased.
...
How do Trigonometric functions work?
...ey do a lousy job of distributing the function approximation's accuracy in order to be "perfect" right near the evaluation point; the error generally zooms upwards as you get away from it. And if you have a function with any noncontinuous derivative (e.g. square waves, triangle waves, and their inte...
Find intersection of two nested lists?
...
Plus, using set will lead to code that's orders of magnitude faster. Here's a sample benchmark®: gist.github.com/andersonvom/4d7e551b4c0418de3160
– andersonvom
Nov 25 '15 at 15:33
...
Easiest way to convert a List to a Set in Java
...run. As I mentioned in my answer, you could use a tree set to get a stable ordering. Another option would be to use a LinkedHashSet which remembers the order that items were added to it.
– Spina
Sep 23 '13 at 12:45
...
Git - How to use .netrc file on Windows to save user and password
... GPG before parsing.
Multiple -f arguments are OK. They are processed in order, and the first matching entry found is returned via the credential helper protocol.
When no -f option is given, .authinfo.gpg, .netrc.gpg, .authinfo, and .netrc files in your home directory are used in this order.
...
What are enums and why are they useful?
...tants, which may override methods).
Implementing an interface (or more) in order to not bind the client code to the enum (which should only provide a set of default implementations).
The simplest example would be a set of Comparator implementations:
enum StringComparator implements Comparator<...
Why can't I have abstract static methods in C#?
...also for something like class Car {public static virtual Car Build(PurchaseOrder PO);}, where every class deriving from Car would have to define a method which could build an instance given a purchase order.
– supercat
Jun 16 '13 at 20:23
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Generate all permutations of a list without adjacent equal elements
...ptotic running time is optimal, since the overhead of generation is on the order of the length of the output. The worst-case delay unfortunately is quadratic; it could be reduced to linear (optimal) with better data structures.
from collections import Counter
from itertools import permutations
from...