The fact that we are not going to go sit in a cave for nine years, or the fact that we’re not going to leave home and be monastics or leave home and live the life of a homeless recluse, that is not a limitation. It’s the equivalent of the elbow not bending backwards.

perhaps 100 million human researcher equivalents running day and night t

a transcendental is something that is, or not a thing, of course, but it's very well known and it has been well known for a very long time.

A new class for containing value objects: it is somewhat similar to Struct (and reuses some of the implementation internally), but is intended to be immutable, and have more modern and cleaner API.

As an aside, I think I now prefer this technique to Python for at least one reason: passing arguments to the decorator method does not make the technique any more complex. Contrast this with Python: <artima.com/weblogs/viewpost.jsp?thread=240845>

def document(f): def wrap(x): print "I am going to square", x f(x) return wrap @document def square(x): print math.pow(x, 2) square(5)

Functions are much more flexible than aliases. The following would overload the usual ls with a version that always does ls -F (arguments are passed in $@, including any flags that you use), pretty much as the alias alias ls="ls -F" would do: ls () { command ls -F "$@" }

an equivalent of R's signif function in Ruby.

Instead of render props, we use Svelte's slot props: // React version <Listbox.Button> {({open, disabled} => /* Something using open and disabled */)} </Listbox.Button> <!--- Svelte version ---> <ListboxButton let:open let:disabled> <!--- Something using open and disabled ---> </ListboxButton>

For those coming from Ruby, Javascript has no builtin method like Ruby’s Array#compact.

get: function(target, prop, receiver) { return "world"; }

Negative margins are in many cases equivalent to position:relative; with negative position, e.g. position:relative; top:-100px, as in Guffa's answer.

What is the equivalent of unbuffer program on Windows?

A job is the same as a process group.

To understand this helper, you should understand that every step invocation calls Output() for you behind the scenes. The following DSL use is identical to the one [above]. class Execute < Trailblazer::Activity::Railway step :find_provider, Output(Trailblazer::Activity::Left, :failure) => Track(:failure), Output(Trailblazer::Activity::Right, :success) => Track(:success)

Since an inverse is the contrapositive of the converse, inverse and converse are logically equivalent to each other.

In logic and mathematics, statements p {\displaystyle p} and q {\displaystyle q} are said to be logically equivalent if they are provable from each other under a set of axioms,[1] or have the same truth value in every model.

{a: 1, b: 2, c: 3, d: 4} => {a:, b:, **rest} # a == 1, b == 2, rest == {:c=>3, :d=>4}

{a, b, ...rest} = {a: 1, b: 2, c: 3, d: 4}

Preload is the Sapper equivalent to getInitialProps in Next.js or asyncData in Nuxt.js.

the error thrown from throw Error("Error from Asynchronous Fn") is equivalent to:async function innerAsyncFn(){ return Promise.reject(Error("Error from Asynchronous Fn"));}

Don't: import { get_store_value } from 'svelte/internal'; There's a public API equivalent

Converting Angular components into Svelte is largely a mechanical process. For the most part, each Angular template feature has a direct corollary in Svelte. Some things are simpler and some are more complex but overall it's pretty easy to do.

This does solve the problem, but now our project and API is structured differently. In large projects it might be very hard to determine how to pull this trick off, or even impossible!

As such, curry is more suitably defined as an operation which, in many theoretical cases, is often applied recursively, but which is theoretically indistinguishable (when considered as an operation) from a partial application.

Supporting JSX out of the box is the engineering equivalent of Mozilla supporting DRM out of the box in FireFox.

We could freeze the objects in the model but don't for efficiency. (The benefits of an immutable-equivalent data structure will be documented in vtree or blog post at some point)

A VTree is designed to be equivalent to an immutable data structure. While it's not actually immutable, you can reuse the nodes in multiple places and the functions we have exposed that take VTrees as arguments never mutate the trees.

For event listeners we support the standard jsx naming convention onEventname (this is converted to on:eventname in svelte) as well.

The $: can also be used to trigger effects.

We can run effects when some data changes using watchEffect - it takes a function that runs whenever a reactive value used inside changes.

page components can have an optional preload function that will load some data that the page depends on. This is similar to getInitialProps in Next.js or asyncData in Nuxt.js.

for example, reactive declarations essentially do the work of React's useMemo, useCallback and useEffect without the boilerplate (or indeed the garbage collection overhead of creating inline functions and arrays on each state change).

You know those useMemo and useCallback hooks? Well, Svelte has something like this. If you declare a variable like this: $: double = counter * 2;, Svelte will recalculate it only if counter changes.

In other words for those tools, you cannot create a package interface where const lib = require("your-lib") yields the same as import lib from "your-lib". With named export mode however, const {lib} = require("your-lib") will be equivalent to import {lib} from "your-lib".

React doesn’t provide something like ng-class, but there is a great library called classnames that does the same and more. Install it:

# Two commits are considered the same if they have the same tree and # the same commit and author metadata. This is how we re-identify # commits after their hash IDs have been rewritten.

+45ºC and minimum of -18ºC.