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describe("flatten",function(){ensureLaziness(function(){Lazy([[david],[mary],[lauren],[adam]]).flatten()});it("flattens nested arrays of arrays into one big array",function(){var nested=[[david],[mary],[lauren,adam],[[daniel],happy]];var flattened=Lazy(nested).flatten().toArray();expect(flattened).toEqual([david,mary,lauren,adam,daniel,happy])});it("flattens nested sequences along with arrays",function(){var nestedSequences=[Lazy([david,mary,Lazy([lauren,adam,Lazy([daniel,happy])])])];var flattened=Lazy(nestedSequences).flatten().toArray();expect(flattened).toEqual([david,mary,lauren,adam,daniel,happy])});it("supports early exiting",function(){var nestedSequences=[Lazy([david,mary,Lazy([lauren,adam,Lazy([daniel,happy])])])];var iterated=[];Lazy(nestedSequences).flatten().each(function(p){iterated.push(p);if(p===lauren){return false}});expect(iterated).toEqual([david,mary,lauren])});it("doesn't over-collect on early exit for multiple 'top-level' arrays",function(){var arrays=[[1,2,3],[4,5,6]];var flattened=Lazy(arrays).flatten().take(2).toArray();expect(flattened).toEqual([1,2])});it("doesn't over-collect on early exit for multiple 'top-level' sequences",function(){var sequences=[Lazy([1,2,3]),Lazy([4,5,6])];var flattened=Lazy(sequences).flatten().take(2).toArray();expect(flattened).toEqual([1,2])});it("passes an index along with each element",function(){var nested=[[david],[mary],[lauren,adam],[[daniel],happy]];expect(Lazy(nested).flatten()).toPassToEach(1,[0,1,2,3,4,5])})});
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