optional-type
v1.0.5
Published
Optional implementation in Typescript
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Optional-type 🤷♂️
A Typescript class trying to be Java's Optional.
Resources
- docs (navigate using the right hand side)
- github repository
- issue tracker
- create issue
- npm package
Why
- Your application might need to add special meaning to
null
values. - Avoid repeating
if(expr === null)
- Avoid
cannot read property prop of null
Examples
Some very good examples can be found here. The examples are written in Java, but the concept should get across regardless.
Sample code:
Optional.ofNullable(response)
.map(response => response.data)
.filter(data => !!data.length)
.ifPresent(data => serialize(data))
.orElse([]);
Now has support for pivoting on both undefined
& null
if you
don't want to differentiate in JS, just expect it to work.
Optional.ofUndefinable(response);
Contributing
To get the project running locally:
git clone
npm install
npm run test
to run jest
Before committing, please recompile the docs using npm run docs
.