Why wrappers are required?

[yuanmai]

Any reason to prefer wrapper over Category? Using category, we can achieve:

@[a, b, c].map(^(NSString *string) {
    return string.capitalizedString;
})

without any wrapping, right?

[robb]

whoops, hit reply too early

[robb]

Yes, but categories should be prefixed, so you'd have

@[a, b, c].us_map(^(NSString *string) {
    return string.capitalizedString;
});

which I don't find very pleasing, aesthetically. If prefer that, which I totally understand, check out BlocksKit, it uses categories and supports a similar functionality.

That being said, I have a branch where the wrappers are NSProxies, allowing you to skip the unwrapping, like so:

NSArray *myArray = _.wrap(@[foo])
   .map(^(NSString *string) {
        return string.capitalizedString;
    })
    .filter(^(NSString *foo){
        // yadda yadda
    });

Note that for the non-chaining use case you can already use

_.arrayMap(@[a, b, c], ^(NSString *string) {
    return string.capitalizedString;
});

[yuanmai]

Thanks for your explanation.