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Number.parseInt #4453

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#4522
Open
Number.parseInt#4453
#4522
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enhancementNew feature or request
@jessekelly881

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@jessekelly881
jessekelly881
opened on Feb 14, 2025 · edited by jessekelly881
Contributor

What is the problem this feature would solve?

Like Number.parse this would be a nice addition.

What is the feature you are proposing to solve the problem?

const parseInt = (str: string, radix?: number): Option.Option<number> => {
  const num = Number.parseInt(str, radix);
  if (Number.isNaN(num)) {
    return Option.none();
  }
  return Option.some(num);
};

Exists internally here:

effect/packages/effect/src/internal/configProvider.ts

Line 696 in 3e7ce97

const parseInteger = (str: string): Option.Option<number> => {

What alternatives have you considered?

No response

Activity

jessekelly881
added
enhancementNew feature or request
on Feb 14, 2025
jessekelly881
changed the title [-]Number.parseInt :: Option<number>[/-] [+]Number.parseInt[/+] on Feb 14, 2025
giuliobracci

giuliobracci commented on Feb 20, 2025

@giuliobracci
giuliobracci
on Feb 20, 2025
Contributor

@jessekelly881 you can define a simple parseInt from Effect's Schema library.

import { Schema } from "effect"

const parseInt = Schema.decodeOption(Schema.NumberFromString);

const decodedNumber = parseInt("2");
const decodedNaN = parseInt("");

console.log(decodedNumber); // decodes to { _id: 'Option', _tag: 'Some', value: 2 }
console.log(decodedNaN); // decodes to { _id: 'Option', _tag: 'None' }

Demo

Let me know if that works for you.

jessekelly881
linked a pull request that will close this issue on Feb 26, 2025
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        Number.parseInt · Issue #4453 · Effect-TS/effect