chain_.chain(obj)
Returns a wrapped object. Calling methods on this object will continue to return wrapped objects until value is called.
var stooges = [{name: 'curly', age: 25}, {name: 'moe', age: 21}, {name: 'larry', age: 23}];
var youngest = _.chain(stooges)
.sortBy(function(stooge){ return stooge.age; })
.map(function(stooge){ return stooge.name + ' is ' + stooge.age; })
.first()
.value();
=> "moe is 21"
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