How to append elements in an array to another array using Ramdajs with a single line statement?
state = {
items:[10,11,]
};
newItems = [1,2,3,4];
state = {
...state,
taggable_friends: R.append(action.payload, state.taggable_friends)
};
//now state is [10,11,[1,2,3,4]], but I want [10,11,1,2,3,4]
Ramda's append works by "pushing" the 1st param into a clone of the 2nd param, which should be an array:
R.append('tests', ['write', 'more']); //=> ['write', 'more', 'tests']
R.append(['tests'], ['write', 'more']); //=> ['write', 'more', ['tests']]
In your case:
R.append([1,2,3,4], [10,11]); // => [10,11,[1,2,3,4]]
Instead use RamdaJS's concat, and reverse the order of the parameters:
R.concat(state.taggable_friends, action.payload)
If you want to use just basic JavaScript you can do this:
return {
...state,
taggable_friends: [...state.taggable_friends, action.payload],
}
