| 'use strict'; |
| |
| |
| function isNothing(subject) { |
| return (typeof subject === 'undefined') || (subject === null); |
| } |
| |
| |
| function isObject(subject) { |
| return (typeof subject === 'object') && (subject !== null); |
| } |
| |
| |
| function toArray(sequence) { |
| if (Array.isArray(sequence)) return sequence; |
| else if (isNothing(sequence)) return []; |
| |
| return [ sequence ]; |
| } |
| |
| |
| function extend(target, source) { |
| var index, length, key, sourceKeys; |
| |
| if (source) { |
| sourceKeys = Object.keys(source); |
| |
| for (index = 0, length = sourceKeys.length; index < length; index += 1) { |
| key = sourceKeys[index]; |
| target[key] = source[key]; |
| } |
| } |
| |
| return target; |
| } |
| |
| |
| function repeat(string, count) { |
| var result = '', cycle; |
| |
| for (cycle = 0; cycle < count; cycle += 1) { |
| result += string; |
| } |
| |
| return result; |
| } |
| |
| |
| function isNegativeZero(number) { |
| return (number === 0) && (Number.NEGATIVE_INFINITY === 1 / number); |
| } |
| |
| |
| module.exports.isNothing = isNothing; |
| module.exports.isObject = isObject; |
| module.exports.toArray = toArray; |
| module.exports.repeat = repeat; |
| module.exports.isNegativeZero = isNegativeZero; |
| module.exports.extend = extend; |