Compares two objects to determine if the first one contains equivalent property values to the second one, based on a provided function.
- Use
Object.keys()
to get all the keys of the second object. - Use
Array.prototype.every()
,Object.prototype.hasOwnProperty()
and the provided function to determine if all keys exist in the first object and have equivalent values. - If no function is provided, the values will be compared using the equality operator.
代码实现
const matchesWith = (obj, source, fn) =>
Object.keys(source).every(key =>
obj.hasOwnProperty(key) && fn
? fn(obj[key], source[key], key, obj, source)
: obj[key] == source[key]
);
const isGreeting = val => /^h(?:i|ello)$/.test(val);
matchesWith(
{ greeting: 'hello' },
{ greeting: 'hi' },
(oV, sV) => isGreeting(oV) && isGreeting(sV)
); // true
翻译自:https://www.30secondsofcode.org/js/s/function-based-object-property-matches