modifyBy.md

modifyBy (source code)

• Curried: true
• Failsafe status: alternative available

The modifyBy function modifies all items in the array that match the provided pattern using the given modifier function.

Arguments:

• pattern: The pattern using which the objects will be matched.
• modifier: A modifier function to modify required properties of the matched objects.
• entityArray: The array of objects in which the objects with given pattern will be modified using the modifier function.

Usage:

const array = [
  { id: 1, name: "Sam", address: { street: "First street", pin: 101283 } },
  { id: 2, name: "Oliver", address: { street: "Second street", pin: 998472 } },
];
const modifier = item => assoc("name", item.name.toUpperCase(), item);

modifyBy({ name: "Oliver" }, modifier, array);
/*
[{id: 1, name: "Sam"}, {id: 2, name: "OLIVER"}]
 */

See also

• modifyById