javascript - One liner to delete multiple object properties
问题描述
I have a few object properties I need to delete at certain point but I still need others so I can't just write delete vm.model;
to remove all of it.
At the moment there are 5 properties I need to delete but the list will most likely grow so I don't want to end up with.
delete vm.model.$$hashKey;
delete vm.model.expiryDate;
delete vm.model.sentDate;
delete vm.model.startDate;
delete vm.model.copied;
I'm looking for a one liner that will do it for me. I did some research and found the _.omit lodash function but I don't want to end up downloading whole library just for a single function.
Is there a angularjs/js function that will clear multiple properties at once?
解决方案
There is no native function that does this yet; but you can always just loop and delete
:
const obj = {
prop1: 'foo',
prop2: 'bar',
prop3: 'baz'
}
;[ 'prop1', 'prop2' ].forEach(prop => delete obj[prop])
console.log(obj)
... found the _.omit lodash function but I don't want to end up downloading whole library just for a single function.
Just abstract the same concept into a function and reuse it:
const obj = {
prop1: 'foo',
prop2: 'bar',
prop3: 'baz'
}
const filterKeys = (obj, keys = []) => {
// NOTE: Clone object to avoid mutating original!
obj = JSON.parse(JSON.stringify(obj))
keys.forEach(key => delete obj[key])
return obj
}
const result1 = filterKeys(obj, ['prop1', 'prop2'])
const result2 = filterKeys(obj, ['prop2'])
console.log(result1)
console.log(result2)