Lodash集合批量更新

Question

I want some code like this:

_.bulkUpdate(myCollection,'meta.type','new');

In other words, I want to update a field in my collection by a string or function, I know that this function is exist, but dont know its name

Answer 1

You can bulk update in place by using _.forEach() to iterate the array, and then _.set() values, or _.update() using a function:

 var arr = [{ id: 1 }, { id: 2 }, { id: 3 }]; _.forEach(arr, function(item, index) { _.set(item, 'meta.type', 'new'); // to set a value _.update(item, 'meta.value', function() { return index; }); // to set with a function }); console.log(arr); 

 <script src="https://cdnjs.cloudflare.com/ajax/libs/lodash.js/4.17.3/lodash.min.js"></script> 

Answer 2

尝试使用_.update或_.updateWith