使用ramda修改对象数组中的属性

Question

I am trying to remove some properties from an array of objects using ramda . I have an array of properties to remove like:

const colToHide = ['name', 'age']; 
// those properties are selected by the user 

And I want to remove the properties 'name' and 'age' (or any user selected property) from one array of objects. The array of objects is something like this:

const person = [
  {name:'sam', age:'24', address:'xyz avenue', employed:true},
  {name:'john', age:'25', address:'xyz avenue', employed:true}
];

What would be right way to update that array of object?

Answer 1

You can use the .omit() method in conjunction with a .map() . Something like this:

 const person = [ {name:'sam', age:'24', address:'xyz avenue', employed:true}, {name:'john', age:'25', address:'xyz avenue', employed:true} ] const omitKeys = (keys, arr) => R.map(R.omit(keys), arr); console.log(omitKeys(["name", "age"], person)); 

 .as-console {background-color:black !important; color:lime;} .as-console-wrapper {max-height:100% !important; top:0;} 

 <script src="//cdnjs.cloudflare.com/ajax/libs/ramda/0.25.0/ramda.min.js"></script> 

Even more, you can use .compose() as @ScottSauyet proposed on the comments to do:

const omitKeys = R.compose(R.map, R.omit);

And then use it as:

omitKeys(["name", "age"])(person);

 const person = [ {name:'sam', age:'24', address:'xyz avenue', employed:true}, {name:'john', age:'25', address:'xyz avenue', employed:true} ] const omitKeys = R.compose(R.map, R.omit); console.log(omitKeys(["name", "age"])(person)); 

 .as-console {background-color:black !important; color:lime;} .as-console-wrapper {max-height:100% !important; top:0;} 

 <script src="//cdnjs.cloudflare.com/ajax/libs/ramda/0.25.0/ramda.min.js"></script> 

Answer 2

or in a point free style using R.useWith :

 const omit = R.useWith(R.map, [ R.omit, R.identity, ]); const persons = [ {name:'sam', age:'24', address:'xyz avenue', employed:true}, {name:'john', age:'25', address:'xyz avenue', employed:true} ] console.log( 'result', omit(["name", "age"], persons), ); 

 <script src="//cdnjs.cloudflare.com/ajax/libs/ramda/0.25.0/ramda.min.js"></script>