_.sortedIndexBy

_.sortedIndexBy(array, value, [iteratee=_.identity])

This method is like _.sortedIndex except that it accepts iteratee which is invoked for value and each element of array to compute their sort ranking. The iteratee is invoked with one argument: (value).

Since

4.0.0

Arguments

1. array (Array): The sorted array to inspect.
2. value (*): The value to evaluate.
3. [iteratee=_.identity] (Function): The iteratee invoked per element.

Returns

(number): Returns the index at which value should be inserted into array.

Example

var objects = [{ 'x': 4 }, { 'x': 5 }];
 
_.sortedIndexBy(objects, { 'x': 4 }, function(o) { return o.x; });
// => 0
 
// The `_.property` iteratee shorthand.
_.sortedIndexBy(objects, { 'x': 4 }, 'x');
// => 0