node-range

Simple Lazy Ranges for Node/Javascript
Install:
npm install node-range
/ Faster than Array.map since it does array composition and function application in same step / var arr = range(1,11).map(function(i) {

return i*5

}) console.log(arr)
/ You can still do / arr = range(1,11).toArray().map(function(i) {

return i*2

}) console.log(arr)
/ As well we can just execute a function against a range but not return an array / range(1,11).forEach(function(i) {

console.log(Math.exp(i,2))

})
/ As well we can execute Async / range(1,11).forEachAsync(function(i) {

console.log('num:' + Math.exp(i,2));

}) console.log('This should come first')