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describe("compared to Underscore, Lo-Dash, etc.",function(){function inc(x){return x+1}function dec(x){return x-1}function square(x){return x*x}function isEven(x){return x%2===0}function identity(x){return x}function arr(from,to){return Lazy.range(from,to).toArray()}function dupes(min,max,count){var numbers=Lazy.generate(function(){return Math.floor(Math.random()*(max-min)+min)});return numbers.take(count).toArray()}function wuTake(arr,count){var i=-1;if(arr instanceof Array){arr=wu(arr)}return arr.takeWhile(function(){return++i<count})}function wuDrop(arr,count){var i=-1;if(arr instanceof Array){arr=wu(arr)}return arr.dropWhile(function(){return++i<count})}var jaggedArray=[[1,2,3],[[4,5,6],[7,8,9],[[10,11],12],13,14,[15,16],17],[18,19,20,[21,22]],[23,24,25],26,27,28,[29,30],[[31,32,33],[34,35]],36];compareAlternatives("map",{lazy:function(arr){return Lazy(arr).map(square)},underscore:function(arr){return _(arr).map(square)},lodash:function(arr){return lodash.map(arr,square)},wu:function(arr){return wu(arr).map(square)},sugar:function(arr){return arr.map(square)},from:function(arr){return from(arr).select(square)},ix:function(arr){return Ix.Enumerable.fromArray(arr).select(square)},boiler:function(arr){return boiler.map(arr,square)},sloth:function(arr){return sloth.ify(arr).map(square)}});compareAlternatives("filter",{lazy:function(arr){return Lazy(arr).filter(isEven)},underscore:function(arr){return _(arr).filter(isEven)},lodash:function(arr){return lodash.filter(arr,isEven)},wu:function(arr){return wu(arr).filter(isEven)},sugar:function(arr){return arr.filter(isEven)},from:function(arr){return from(arr).where(isEven)},ix:function(arr){return Ix.Enumerable.fromArray(arr).where(isEven)},boiler:function(arr){return boiler.filter(arr,isEven)},sloth:function(arr){return sloth.ify(arr).filter(isEven)}});compareAlternatives("flatten",{lazy:function(arr){return Lazy(arr).flatten()},underscore:function(arr){return _(arr).flatten()},lodash:function(arr){return lodash.flattenDeep(arr)},sugar:function(arr){return arr.flatten()},boiler:function(arr){return boiler.flatten(arr)},inputs:[[jaggedArray]]});compareAlternatives("uniq (mostly duplicates)",{lazy:function(arr){return Lazy(arr).uniq()},underscore:function(arr){return _(arr).uniq()},lodash:function(arr){return lodash.uniq(arr)},sugar:function(arr){return arr.unique()},from:function(arr){return from(arr).distinct()},ix:function(arr){return Ix.Enumerable.fromArray(arr).distinct()},boiler:function(arr){return boiler.uniq(arr)},inputs:[[dupes(0,2,10)],[dupes(0,10,100)]]});compareAlternatives("uniq (about half dupes)",{lazy:function(arr){return Lazy(arr).uniq()},underscore:function(arr){return _(arr).uniq()},lodash:function(arr){return lodash.uniq(arr)},sugar:function(arr){return arr.unique()},from:function(arr){return from(arr).distinct()},ix:function(arr){return Ix.Enumerable.fromArray(arr).distinct()},boiler:function(arr){return boiler.uniq(arr)},inputs:[[dupes(0,5,10)],[dupes(0,50,100)]]});compareAlternatives("uniq (mostly uniques)",{lazy:function(arr){return Lazy(arr).uniq()},underscore:function(arr){return _(arr).uniq()},lodash:function(arr){return lodash.uniq(arr)},sugar:function(arr){return arr.unique()},from:function(arr){return from(arr).distinct()},ix:function(arr){return Ix.Enumerable.fromArray(arr).distinct()},boiler:function(arr){return boiler.uniq(arr)},inputs:[[dupes(0,10,10)],[dupes(0,100,100)]]});compareAlternatives("union",{lazy:function(arr,other){return Lazy(arr).union(other)},underscore:function(arr,other){return _.union(arr,other)},lodash:function(arr,other){return lodash.union(arr,other)},sugar:function(arr,other){return arr.union(other)},from:function(arr,other){return from(arr).union(other)},ix:function(arr,other){return Ix.Enumerable.fromArray(arr).union(Ix.Enumerable.fromArray(other))},boiler:function(arr,other){return boiler.union(arr,other)},sloth:function(arr,other){return sloth.ify(arr).union(other)},inputs:[[arr(0,10),arr(5,15)],[arr(0,100),arr(50,150)]]});compareAlternatives("intersection",{lazy:function(arr,other){return Lazy(arr).intersection(other)},underscore:function(arr,other){return _.intersection(arr,other)},lodash:function(arr,other){return lodash.intersection(arr,other)},sugar:function(arr,other){return arr.intersect(other)},from:function(arr,other){return from(arr).intersect(other)},ix:function(arr,other){return Ix.Enumerable.fromArray(arr).intersect(Ix.Enumerable.fromArray(other))},boiler:function(arr,other){return boiler.intersection(arr,other)},sloth:function(arr,other){return sloth.ify(arr).intersect(other)},inputs:[[arr(0,10),arr(5,15)],[arr(0,100),arr(50,150)]]});compareAlternatives("shuffle",{lazy:function(arr){return Lazy(arr).shuffle()},underscore:function(arr){return _(arr).shuffle()},lodash:function(arr){return lodash.shuffle(arr)},sugar:function(arr){return arr.randomize()},boiler:function(arr){return boiler.shuffle(arr)},shouldMatch:false});compareAlternatives("zip",{lazy:function(arr,other){return Lazy(arr).zip(other)},underscore:function(arr,other){return _(arr).zip(other)},lodash:function(arr,other){return lodash.zip(arr,other)},sugar:function(arr,other){return arr.zip(other)},boiler:function(arr,other){return boiler.zip(arr,other)},inputs:[[arr(0,10),arr(5,15)],[arr(0,100),arr(50,150)]]});compareAlternatives("map -> filter",{lazy:function(arr){return Lazy(arr).map(inc).filter(isEven)},underscore:function(arr){return _.chain(arr).map(inc).filter(isEven)},lodash:function(arr){return lodash(arr).map(inc).filter(isEven)},wu:function(arr){return wu(arr).map(inc).filter(isEven)},sugar:function(arr){return arr.map(inc).filter(isEven)},from:function(arr){return from(arr).select(inc).where(isEven)},ix:function(arr){return Ix.Enumerable.fromArray(arr).select(inc).where(isEven)},boiler:function(arr){return boiler.chain(arr).map(inc).filter(isEven).end()},sloth:function(arr){return sloth.ify(arr).map(inc).filter(isEven)},category:"chained"});compareAlternatives("flatten -> map",{lazy:function(arr){return Lazy(arr).flatten().map(inc)},underscore:function(arr){return _.chain(arr).flatten().map(inc)},lodash:function(arr){return lodash(arr).flattenDeep().map(inc)},sugar:function(arr){return arr.flatten().map(inc)},boiler:function(arr){return boiler.chain(arr).flatten().map(inc).end()},category:"chained",inputs:[[jaggedArray]]});compareAlternatives("map -> uniq",{lazy:function(arr){return Lazy(arr).map(inc).uniq()},underscore:function(arr){return _.chain(arr).map(inc).uniq()},lodash:function(arr){return lodash(arr).map(inc).uniq()},sugar:function(arr){return arr.map(inc).unique()},from:function(arr){return from(arr).select(inc).distinct()},ix:function(arr){return Ix.Enumerable.fromArray(arr).select(inc).distinct()},boiler:function(arr){return boiler.chain(arr).map(inc).uniq().end()},category:"chained",inputs:[[dupes(0,5,10)],[dupes(0,50,100)]]});compareAlternatives("map -> union",{lazy:function(arr,other){return Lazy(arr).map(inc).union(other)},underscore:function(arr,other){return _.chain(arr).map(inc).union(other)},lodash:function(arr,other){return lodash(arr).map(inc).union(other)},sugar:function(arr,other){return arr.map(inc).union(other)},from:function(arr,other){return from(arr).select(inc).union(other)},ix:function(arr,other){return Ix.Enumerable.fromArray(arr).select(inc).union(Ix.Enumerable.fromArray(other))},boiler:function(arr,other){return boiler.chain(arr).map(inc).union(other).end()},sloth:function(arr,other){return sloth.ify(arr).map(inc).union(other)},category:"chained",inputs:[[arr(0,10),arr(5,15)],[arr(0,100),arr(50,150)]]});compareAlternatives("map -> intersection",{lazy:function(arr,other){return Lazy(arr).map(inc).intersection(other)},underscore:function(arr,other){return _.chain(arr).map(inc).intersection(other)},lodash:function(arr,other){return lodash(arr).map(inc).intersection(other)},sugar:function(arr,other){return arr.map(inc).intersect(other)},from:function(arr,other){return from(arr).select(inc).intersect(other)},ix:function(arr,other){return Ix.Enumerable.fromArray(arr).select(inc).intersect(Ix.Enumerable.fromArray(other))},boiler:function(arr,other){return boiler.chain(arr).map(inc).intersection(other)},sloth:function(arr,other){return sloth.ify(arr).map(inc).intersect(other)},category:"chained",inputs:[[arr(0,10),arr(5,15)],[arr(0,100),arr(50,150)]]});compareAlternatives("map -> shuffle",{lazy:function(arr){return Lazy(arr).map(inc).shuffle()},underscore:function(arr){return _.chain(arr).map(inc).shuffle()},lodash:function(arr){return lodash(arr).map(inc).shuffle()},sugar:function(arr){return arr.map(inc).randomize()},boiler:function(arr){return boiler.chain(arr).map(inc).shuffle()},category:"chained",shouldMatch:false});compareAlternatives("map -> zip",{lazy:function(arr,other){return Lazy(arr).map(inc).zip(other)},underscore:function(arr,other){return _.chain(arr).map(inc).zip(other)},lodash:function(arr,other){return lodash(arr).map(inc).zip(other)},sugar:function(arr,other){return arr.map(inc).zip(other)},boiler:function(arr,other){return boiler.chain(arr).map(inc).zip(other)},category:"chained",inputs:[[arr(0,10),arr(5,15)],[arr(0,100),arr(50,150)]]});compareAlternatives("map -> indexOf",{lazy:function(arr,value){return Lazy(arr).map(inc).indexOf(value)},underscore:function(arr,value){return _.chain(arr).map(inc).indexOf(value)},lodash:function(arr,value){return lodash(arr).map(inc).indexOf(value)},sugar:function(arr,value){return arr.map(inc).indexOf(value)},boiler:function(arr,value){return boiler.chain(arr).map(inc).indexOf(value)},category:"shorted",inputs:[[arr(0,10),4],[arr(0,100),35]],valueOnly:true});compareAlternatives("map -> sortedIndex",{lazy:function(arr){return Lazy(arr).map(inc).sortedIndex(arr[arr.length/2])},underscore:function(arr){return _.chain(arr).map(inc).sortedIndex(arr[arr.length/2])},lodash:function(arr){return lodash(arr).map(inc).sortedIndex(arr[arr.length/2])},category:"shorted",inputs:[[arr(0,10),4],[arr(0,100),35]],valueOnly:true});compareAlternatives("map -> take",{lazy:function(arr){return Lazy(arr).map(inc).take(5)},underscore:function(arr){return _.chain(arr).map(inc).take(5)},lodash:function(arr){return lodash(arr).map(inc).take(5)},sugar:function(arr){return arr.map(inc).first(5)},from:function(arr){return from(arr).select(inc).take(5)},ix:function(arr){return Ix.Enumerable.fromArray(arr).select(inc).take(5)},boiler:function(arr){return boiler.chain(arr).map(inc).first(5).end()},sloth:function(arr){return sloth.ify(arr).map(inc).take(5)},category:"shorted"});compareAlternatives("filter -> take",{lazy:function(arr){return Lazy(arr).filter(isEven).take(5)},underscore:function(arr){return _.chain(arr).filter(isEven).first(5)},lodash:function(arr){return lodash(arr).filter(isEven).take(5)},sugar:function(arr){return arr.filter(isEven).first(5)},from:function(arr){return from(arr).where(isEven).take(5)},ix:function(arr){return Ix.Enumerable.fromArray(arr).where(isEven).take(5)},boiler:function(arr){return boiler.chain(arr).filter(isEven).first(5).end()},sloth:function(arr){return sloth.ify(arr).filter(isEven).take(5)},category:"shorted"});compareAlternatives("map -> filter -> take",{lazy:function(arr){return Lazy(arr).map(inc).filter(isEven).take(5)},underscore:function(arr){return _.chain(arr).map(inc).filter(isEven).take(5)},lodash:function(arr){return lodash(arr).map(inc).filter(isEven).take(5)},wu:function(arr){return wuTake(wu(arr).map(inc).filter(isEven),5)},sugar:function(arr){return arr.map(inc).filter(isEven).first(5)},from:function(arr){return from(arr).select(inc).where(isEven).take(5)},ix:function(arr){return Ix.Enumerable.fromArray(arr).select(inc).where(isEven).take(5)},boiler:function(arr){return boiler.chain(arr).map(inc).filter(isEven).first(5).end()},sloth:function(arr){return sloth.ify(arr).map(inc).filter(isEven).take(5)},category:"shorted"});compareAlternatives("map -> drop -> take",{lazy:function(arr){return Lazy(arr).map(inc).drop(5).take(5)},underscore:function(arr){return _.chain(arr).map(inc).rest(5).take(5)},lodash:function(arr){return lodash(arr).map(inc).drop(5).take(5)},wu:function(arr){return wuTake(wuDrop(wu(arr).map(inc),5),5)},sugar:function(arr){return arr.map(inc).last(arr.length-5).first(5)},from:function(arr){return from(arr).select(inc).skip(5).take(5)},ix:function(arr){return Ix.Enumerable.fromArray(arr).select(inc).skip(5).take(5)},boiler:function(arr){return boiler.chain(arr).map(inc).rest(5).first(5).end()},sloth:function(arr){return sloth.ify(arr).map(inc).drop(5).take(5)},category:"shorted"});compareAlternatives("filter -> drop -> take",{lazy:function(arr){return Lazy(arr).filter(isEven).drop(5).take(5)},underscore:function(arr){return _.chain(arr).filter(isEven).rest(5).first(5)},lodash:function(arr){return lodash(arr).filter(isEven).drop(5).take(5)},from:function(arr){return from(arr).where(isEven).skip(5).take(5)},ix:function(arr){return Ix.Enumerable.fromArray(arr).where(isEven).skip(5).take(5)},boiler:function(arr){return boiler.chain(arr).filter(isEven).rest(5).first(5).end()},sloth:function(arr){return sloth.ify(arr).filter(isEven).drop(5).take(5)},category:"shorted"});compareAlternatives("flatten -> take",{lazy:function(arr){return Lazy(arr).flatten().take(5)},underscore:function(arr){return _.chain(arr).flatten().first(5)},lodash:function(arr){return lodash(arr).flattenDeep().take(5)},sugar:function(arr){return arr.flatten().first(5)},boiler:function(arr){return boiler.chain(arr).flatten().first(5).end()},category:"shorted",inputs:[[jaggedArray]]});compareAlternatives("uniq -> take",{lazy:function(arr){return Lazy(arr).uniq().take(5)},underscore:function(arr){return _.chain(arr).uniq().first(5)},lodash:function(arr){return lodash(arr).uniq().take(5)},sugar:function(arr){return arr.unique().first(5)},from:function(arr){return from(arr).distinct().take(5)},ix:function(arr){return Ix.Enumerable.fromArray(arr).distinct().take(5)},boiler:function(arr){return boiler.chain(arr).uniq().first(5).end()},category:"shorted",inputs:[[dupes(0,5,10)],[dupes(0,10,100)]]});compareAlternatives("union -> take",{lazy:function(arr,other){return Lazy(arr).union(other).take(5)},underscore:function(arr,other){return _.chain(arr).union(other).first(5)},lodash:function(arr,other){return lodash(arr).union(other).take(5)},sugar:function(arr,other){return arr.union(other).first(5)},from:function(arr,other){return from(arr).union(other).take(5)},ix:function(arr,other){return Ix.Enumerable.fromArray(arr).union(other).take(5)},boiler:function(arr,other){return boiler.chain(arr).union(other).first(5).end()},sloth:function(arr,other){return sloth.ify(arr).union(other).take(5)},category:"shorted",inputs:[[arr(0,10),arr(5,15)],[arr(0,100),arr(50,150)]]});compareAlternatives("intersection -> take",{lazy:function(arr,other){return Lazy(arr).intersection(other).take(5)},underscore:function(arr,other){return _.chain(arr).intersection(other).first(5)},lodash:function(arr,other){return lodash(arr).intersection(other).take(5)},sugar:function(arr,other){return arr.intersect(other).first(5)},from:function(arr,other){return from(arr).intersect(other).take(5)},ix:function(arr,other){return Ix.Enumerable.fromArray(arr).intersect(Ix.Enumerable.fromArray(other)).take(5)},boiler:function(arr,other){return boiler.chain(arr).intersection(other).first(5).end()},sloth:function(arr,other){return sloth.ify(arr).intersect(other).take(5)},category:"shorted",inputs:[[arr(0,10),arr(5,15)],[arr(0,100),arr(50,150)]]});compareAlternatives("without -> take",{lazy:function(arr,other){return Lazy(arr).without(other).take(5)},underscore:function(arr,other){return _.chain(arr).difference(other).first(5)},lodash:function(arr,other){return lodash(arr).difference(other).take(5)},sugar:function(arr,other){return arr.subtract(other).first(5)},category:"shorted",inputs:[[arr(0,10),arr(3,7)],[arr(0,100),arr(25,75)]]});compareAlternatives("shuffle -> take",{lazy:function(arr){return Lazy(arr).shuffle().take(5)},underscore:function(arr){return _.chain(arr).shuffle().first(5)},lodash:function(arr){return lodash(arr).shuffle().take(5)},sugar:function(arr){return arr.randomize().first(5)},boiler:function(arr){return boiler.chain(arr).shuffle().first(5).end()},category:"shorted",shouldMatch:false});compareAlternatives("zip -> take",{lazy:function(arr,other){return Lazy(arr).zip(other).take(5)},underscore:function(arr,other){return _.chain(arr).zip(other).first(5)},lodash:function(arr,other){return lodash(arr).zip(other).take(5)},sugar:function(arr,other){return arr.zip(other).first(5)},boiler:function(arr,other){return boiler.chain(arr).zip(other).first(5).end()},category:"shorted",inputs:[[arr(0,10),arr(5,15)],[arr(0,100),arr(50,150)]]});compareAlternatives("map -> any",{lazy:function(arr){return Lazy(arr).map(inc).any(isEven)},underscore:function(arr){return _.chain(arr).map(inc).any(isEven)},lodash:function(arr){return lodash(arr).map(inc).some(isEven)},sugar:function(arr){return arr.map(inc).any(isEven)},from:function(arr){return from(arr).select(inc).any(isEven)},ix:function(arr){return Ix.Enumerable.fromArray(arr).select(inc).any(isEven)},boiler:function(arr){return boiler.chain(arr).map(inc).any(isEven)},sloth:function(arr,other){return sloth.ify(arr).map(inc).any(isEven)},category:"shorted",valueOnly:true});compareAlternatives("map -> all",{lazy:function(arr){return Lazy(arr).map(inc).all(isEven)},underscore:function(arr){return _.chain(arr).map(inc).every(isEven)},lodash:function(arr){return lodash(arr).map(inc).every(isEven)},sugar:function(arr){return arr.map(inc).all(isEven)},from:function(arr){return from(arr).select(inc).all(isEven)},ix:function(arr){return Ix.Enumerable.fromArray(arr).select(inc).all(isEven)},boiler:function(arr){return boiler.chain(arr).map(inc).all(isEven)},sloth:function(arr,other){return sloth.ify(arr).map(inc).all(isEven)},category:"shorted",valueOnly:true});compareAlternatives("map -> join",{lazy:function(arr){return Lazy(arr).map(inc).join(", ")},underscore:function(arr){return _(arr).map(inc).join(", ")},category:"other",valueOnly:true});compareAlternatives("split(string) -> take",{lazy:function(str,delimiter){return Lazy(str).split(delimiter).take(5)},underscore:function(str,delimiter){return _(str.split(delimiter)).take(5)},category:"other",inputs:[[Lazy.range(100).join(", "),", "]]});compareAlternatives("split(regex) -> take",{lazy:function(str,delimiter){return Lazy(str).split(delimiter).take(5)},underscore:function(str,delimiter){return _(str.split(delimiter)).take(5)},category:"other",inputs:[[Lazy.range(100).join(", "),/,\s*/]]});compareAlternatives("match(regex) -> take",{lazy:function(str,pattern){return Lazy(str).match(pattern).take(5)},underscore:function(str,pattern){return _(str.match(pattern)).take(5)},category:"other",inputs:[[Lazy.range(100).join(" "),/\d+/g]]})});

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