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- /**
- * 判断一个对象是否存在key,如果传入第二个参数key,则是判断这个obj对象是否存在key这个属性
- * 如果没有传入key这个参数,则判断obj对象是否有键值对
- */
- export const hasKey = (obj, key) => {
- if (key) return key in obj
- else {
- let keysArr = Object.keys(obj)
- return keysArr.length
- }
- }
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