Is there a way to assign values to multiple keys of an object without repeating the object name?
For example: We have this object created:
var obj = {
"a": 0,
"b": 0,
"c": 0,
"d": 0
}
What i want now is to assign values to some or all keys of this object which is already created(you would normally do it like this):
obj["a"] = yourValue;
obj["c"] = yourValue;
obj["d"] = yourValue;
but without repeating the object name as i did above.
Would there be a way to do such thing?
You could use Object.assign and map the wanted keys with the values as object for an update with the wanted value.
var object = { a: 0, b: 0, c: 0, d: 0 },
value = 42,
keys = ['a', 'c', 'd'];
Object.assign(object, ...keys.map(k => ({ [k]: value })));
console.log(object);ES5
var object = { a: 0, b: 0, c: 0, d: 0 },
value = 42,
keys = ['a', 'c', 'd'];
keys.forEach(function (k) {
object[k] = value;
});
console.log(object);but without repeating the object name as i did above.
Object assign might come handy here
Object.assign(obj, { a: 0,b:0,c:0 });
var obj = {
"a": 0,
"b": 0,
"c": 0,
"d": 0
}
Object.assign(obj, { a:1,b:0,c:1 });
console.log(obj)var obj = {
"a": 0,
"b": 0,
"c": 0,
"d": 0
};
yourvalue = 'test'
for(key in obj){
obj[key] = yourvalue
}
A for-in loop will work for you. It loops trough all key entries and allows you to assign a value to it.
What i want now is to assign values to some or all keys of this object which is already createdYou can't go without iterating through the keys
var obj = {
"a": 0,
"b": 0,
"c": 0,
"d": 0
}
Object.keys(obj).forEach(k => {
obj[k] = yourValue;
});
You could create an array with the key values and then use a for loop.
var obj = {
"a": 0,
"b": 0,
"c": 0,
"d": 0
}
var arr = ["a", "b", "c", "d"];
for(var i = 0; i<arr.length; i++){
obj[arr[i]] = yourValue;
}
yourValueonly a primitive value?obj...