Iterating is easy to understand. It simply means looping over a sequence of elements. Here are some easy examples: Iterating over a String Iterating over an Array Iterating Over a String You can use afor..ofloop to iterate over the elements of a string: ...
import{createReadStream}from"node:fs";import{Splitable}from"async-iterable-split";constiterable=createReadStream("./foo.txt");// Node.js readable stream is async iterable (since v10.0.0)constsplitable=newSplitable(iterable);// Any object that deploys the [Symbol.asyncIterator] interface can ...
An async iterator doesn't need to stop the world, but its overhead means you probably need to batch items. The only reasonable choice is a mixture of the behaviors: in this example 1% async and 99% synchronous behavior (edit: technically 0.1%). You will almost certainly implement this by...
By using a iterator, we can obtain a value when needed rather than get all values at a time, which means that we can save lots of memory. However, this also means that we can only access each value for just one time, algorithms that perform this way are generally called "single pass"...
type === 2means "end" (a.k.a. "unsubscribe" on Subscriptions) (type: number, payload?: any) => void Definitions Callbag: a function of signature (TypeScript syntax:)(type: 0 | 1 | 2, payload?: any) => void Greet: if a callbag is called with0as the first argument, we say ...
in usually means a lot of guard clauses in your loop block to avoid properties you don’t want. Early javascript worked around this via libraries. Many javascript libraries (Prototype.js, jQuery, lodash, etc.) have something like an each or foreach utility method/function that let you loop...
The first problem with string being iterable by default is that, in your program's semantics, strings are rarely actually collections. Something being a collection means that the important part of it is that it's a sequence of individual things, each of which is important to your program. An...
However none of these new data-structures can be used in libraries where an Array is expected, which means developers are often stuck between abandoning their favorite libraries or limiting their data-structure choices at the cost of efficiency or usefulness....
I don't know if the right move for our sake is to check if it is a Immutable.js structure or not, as this might cause too much overhead in our shouldComponentUpdate and leads to a slippery path where it does too much. Makes sense?
Returns an object with the means for producing and consuming values exposed as direct properties. Acts like a "stripped down" version of the mainiterifiedabove. Does not receive anexecutor function. Can be seen essentially as a bare, general-purpose channel of events, however while still support...