partial source npm
_.partial(func, [partials])
Creates a function that invokes func
with partial
arguments prepended
to those provided to the new function. This method is like _.bind
except
it does not alter the this
binding.
The _.partial.placeholder
value, which defaults to _
in monolithic
builds, may be used as a placeholder for partially applied arguments.
Note: This method doesn't set the "length" property of partially
applied functions.
Arguments
- func (Function)
The function to partially apply arguments to.
- [partials] (...*)
The arguments to be partially applied.
Returns (Function)
Returns the new partially applied function.
Example
var greet = function(greeting, name) {
return greeting + ' ' + name;
};
var sayHelloTo = _.partial(greet, 'hello');
sayHelloTo('fred');
// => 'hello fred'
// using placeholders
var greetFred = _.partial(greet, _, 'fred');
greetFred('hi');
// => 'hi fred'