javascript set all values in array of object

Question

Two part question about similar problems. I\'ve got 2 different arrays,

array 1:

 array1 = [{
     name : \"users\",
     checked :          


        

Answer 1

You can't do this without looping over the elements, however there are functional abstractions you can use instead of for:

For array 1, you can use map

array1.map(function(x) { 
  x.checked = true; 
  return x
});

Or using _.map from lodash:

_.map(array1, function(x) { 
  x.checked = true; 
  return x
});

For array 2 you can use _.mapValues from lodash.

_.mapValues(array2[0], function() {
  return true;
});

You can see that lodash implements _.map using while at https://github.com/lodash/lodash/blob/a1b15df6489f47498edda244552c9804e046a45d/lodash.js#L3125