Underscore.JS range方法

_.range([start], stop, [step])

var _ = require('underscore');

//Example 1: create an array of 5 elements
result = _.range(5);
console.log(result)

//Example 2: create an array of 5 elements from 5 to 10
result = _.range(5, 11);
console.log(result)

//Example 3: create an array of elements from 0 to 20(exclusive) with step 5
result = _.range(0, 20, 5);
console.log(result)

//Example 4: create an array of 5 negative elements
result = _.range(0, -5, -1);
console.log(result)

//Example 5: create an empty array
result = _.range(0);
console.log(result)

>node tester.js

[ 0, 1, 2, 3, 4 ]
[ 5, 6, 7, 8, 9, 10 ]
[ 0, 5, 10, 15 ]
[ 0, -1, -2, -3, -4 ]
[]