Ecosyste.ms: Awesome

An open API service indexing awesome lists of open source software.

https://github.com/robb/Underscore.m

A DSL for Data Manipulation
https://github.com/robb/Underscore.m

Last synced: about 2 months ago
JSON representation

A DSL for Data Manipulation

Lists

README 

        
# Underscore.m



## About Underscore.m



Underscore.m is a small utility library to facilitate working with common data structures in Objective-C.  

It tries to encourage chaining by eschewing the square bracket]]]]]].  

It is inspired by the awesome [underscore.js][js].



[js]: http://documentcloud.github.com/underscore



## Real world example



```objective-c

// First, let's compose a twitter search request

NSURL *twitterSearch = [NSURL URLWithString:@"http://search.twitter.com/search.json?q=@SoundCloud&rpp=100"];



// ... then we fetch us some json ...

NSData *data = [NSData dataWithContentsOfURL:twitterSearch];



// ... and parse it.

NSDictionary *json = [NSJSONSerialization JSONObjectWithData:data

                                                     options:kNilOptions

                                                       error:NULL];



// This is where the fun starts!

NSArray *tweets = [json valueForKey:@"results"];



NSArray *processed = _array(tweets)

    // Let's make sure that we only operate on NSDictionaries, you never

    // know with these APIs ;-)

    .filter(Underscore.isDictionary)

    // Remove all tweets that are in English

    .reject(^BOOL (NSDictionary *tweet) {

        return [[tweet valueForKey:@"iso_language_code"] isEqualToString:@"en"];

    })

    // Create a simple string representation for every tweet

    .map(^NSString *(NSDictionary *tweet) {

        NSString *name = [tweet valueForKey:@"from_user_name"];

        NSString *text = [tweet valueForKey:@"text"];



        return [NSString stringWithFormat:@"%@: %@", name, text];

    })

    .unwrap;

```



## Documentation



Documentation for Underscore.m can be found on [the website](https://robb.github.io/Underscore.m/).