[英]How to check if an object has keys that are in an array?
I have an array of strings and I want to check if the object has all properties that are in this array. 我有一个字符串数组,我想检查对象是否具有此数组中的所有属性。
I could do a for loop and use .hasOwnProperty()
but I want a better and smaller way to do it. 我可以做一个for循环并使用
.hasOwnProperty()
但是我想要一种更好,更小的方法。 I tried things like .includes
, var v in obj
, passing an array to .hasOwnProperty
but nothing seems to work. 我尝试了诸如
.includes
, var v in obj
类的事情,将数组传递给.hasOwnProperty
但似乎没有任何效果。
const obj = {Password: '123456', Username: 'MeMyselfAndI'}
const checkFields= ['Method', 'Password', 'Username']
return checkIfObjectHaveKeysOfArray(obj, checkFields) // should return false because object doesn't have property 'Method'
Is there a way to do that without using a for loop? 有没有一种方法,而无需使用for循环? If yes, how?
如果是,怎么办?
I could do a for loop and use .hasOwnProperty() but I wan't a better and smaller way to do it
我可以做一个for循环并使用.hasOwnProperty()但我没有更好,更小的方法
Loops aren't that big. 循环不是那么大。 :-) But you could use
every
with an arrow function: :-)但是您可以将
every
箭头功能使用:
return checkFields.every(key => obj.hasOwnProperty(key));
Live Example: 现场示例:
const obj = {Password: '123456', Username: 'MeMyselfAndI'} const checkFields= ['Method', 'Password', 'Username'] const result = checkFields.every(key => obj.hasOwnProperty(key)); console.log(result); // false
You could use Object.hasOwnProperty
and check every key. 您可以使用
Object.hasOwnProperty
并检查每个键。
const object = { Password: '123456', Username: 'MeMyselfAndI' }, checkFields = ['Method', 'Password', 'Username'], hasAllKeys = checkFields.every({}.hasOwnProperty.bind(object)); console.log(hasAllKeys);
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