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lazy-eval
Advanced tools
Readme
Simple and small library to do lazy evaluation (and memoization) with Javascript.
import lazy from 'lazy-eval';
let counter = 0;
const executor = () => {
counter += 1;
return 'result';
};
const lazyVal = lazy(executor);
console.log(counter); // 0
console.log(lazyVal()); // 'result'
console.log(counter); // 1
console.log(lazyVal()); // 'result'
console.log(counter); // 1
console.log(lazyVal.isLazy); // true
import lazy from 'lazy-eval';
let counter = 0;
const lazyVal = lazy(() => {
counter += 1;
return 1;
});
const lazyOp = lazyVal.then((v1) => lazy(() => {
counter += 1;
return v1 + 1;
}));
console.log(counter); // 1
console.log(lazyOp()); // 2
console.log(counter); // 2
console.log(lazyOp()); // 2
console.log(counter); // 2
import lazy from 'lazy-eval';
let counter = 0;
const lazyVal = lazy(() => {
counter += 1;
return 1;
});
const lazyOp = lazyVal.map(v => {
counter += 1;
return v + 1;
});
console.log(counter); // 0
console.log(lazyOp()); // 2
console.log(counter); // 2
console.log(lazyOp()); // 2
console.log(counter); // 2
import { default as lazy, Lazy } from 'lazy-eval';
let counter = 0;
const executor = (): string => {
counter += 1;
return 'result';
};
const lazyVal: Lazy<string> = lazy(executor);
console.log(counter); // 0
console.log(lazyVal()); // 'result'
console.log(counter); // 1
console.log(lazyVal()); // 'result'
console.log(counter); // 1
console.log(lazyVal.isLazy); // true
FAQs
Library to do lazy evaluation with Typescript
The npm package lazy-eval receives a total of 104 weekly downloads. As such, lazy-eval popularity was classified as not popular.
We found that lazy-eval demonstrated a not healthy version release cadence and project activity because the last version was released a year ago. It has 1 open source maintainer collaborating on the project.
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