Find matching elements in array and do something for each match - lodash

Question

I'm a little overwhelmed by all the functions available to me in Lodash, so I hope someone can point me to the one I'm sure exists which will do the following for me. I want to be able to pass an array and a search condition, and have it loop through all the matched items, allowing me to run a function for each. What I have at the moment is something akin to this:
_.each(myArray, (item) => {
if (item.field=="whatever") {
console.log("Matched by "+item.name);
}
});
This works fine, of course. It's just that I'm sure Lodash has a way for me to move the item.field=="whatever" into the function arguments somehow, and I'd prefer to go with the more idiomatic Lodash way if I can.

Answer 1

It's just that I'm sure Lodash has a way for me to move the item.field == "whatever" into the function arguments somehow
If you want to find all the matching items in an array based on the arguments you pass in, then you could use the _.filter method, which can use the _.matches shorthand internally:
_.filter(myArray, { field: 'whatever' });
However, you would still need to loop over the items if you want to do something for each match:
_.each(_.filter(myArray, { field: 'whatever' }), item => {
console.log("Matched by " + item.name);
});
Alternatively, if you want a different way of writing this, you can wrap the filtered items with the lodash object wrapper, _(), which essentially enables chaining, thereby allowing you to chain the _.each() method:
_(_.filter(myArray, { field: 'whatever' })).each(item => {
console.log("Matched by " + item.name);
});
Or a more readable version:
var matchedItems = _.filter(myArray, { field: 'whatever' });
_(matchedItems).each(item => {
console.log("Matched by " + item.name);
});
Personally, I would probably just keep what you originally wrote since it's short, readable and easy to maintain.