查找属性，然后替换其所有值-lodash

Question

I have an array of objects:

users = [
  {userId: 23, userName:"foo"},
  {userId: 34, userName:"wrong"},
  {userId: 45, userName:"baz"},
  {userId: 56, userName:"..."},
]

Lets say I want to find all objects with the property of userName and replace the value with updatedUser:

updatedUser = {"foo"}

so in this case I will end up with a new array like:

users = [
  {userId: 23, userName:"foo"},
  {userId: 34, userName:"foo"},
  {userId: 45, userName:"foo"},
  {userId: 56, userName:"foo"}
]

I am using lodash but dont mind native.

Any help please?

Answer 1

Why you need lodash, you can do it simply like following.

users.forEach((el)=>{el.userName= "foo";}) 

 users = [ {userId: 23, userName:"foo"}, {userId: 34, userName:"wrong"}, {userId: 45, userName:"baz"}, {userId: 56, userName:"..."} ] users.forEach((el)=>{el.userName = "foo";}) console.log(users); 

Still if you prefer using lodash , you can try like following.

_.setProperty( users, 'userName', 'foo' );

Answer 2

You could assign a new object with the wanted value.

 var users = [{ userId: 23, userName: "foo" }, { userId: 34, userName: "wrong" }, { userId: 45, userName: "baz" }, { userId: 56, userName: "..." }], update = { userName: "foo" }, result = users.map(o => Object.assign({}, o, update)); console.log(result); 

Answer 3

you can users Array.prototype.map and override the userName field for each element

 const users = [ {userId: 23, userName:"foo"}, {userId: 34, userName:"wrong"}, {userId: 45, userName:"baz"}, {userId: 56, userName:""} ]; const result = users.map(u => ({...u, userName: "foo"})); console.log(result);