Function apply_first 

pub fn apply_first<'a, ClonableFnBrand: 'a + ClonableFn, Brand: ApplyFirst, A: 'a + Clone, B: Clone>(
    fa: Apply0L1T<Brand, A>,
) -> ApplyFn<'a, ClonableFnBrand, Apply0L1T<Brand, B>, Apply0L1T<Brand, A>>

Combines two contexts, keeping the value from the first context.

Free function version that dispatches to the type class’ associated function.

Type Signature

forall a b. ApplyFirst f => f a -> f b -> f a

Parameters

• fa: The first context containing a value.
• fb: The second context containing a value (will be discarded).

Returns

The first context with its value preserved.

Examples

use fp_library::{brands::{OptionBrand, RcFnBrand}, functions::apply_first};

assert_eq!(apply_first::<RcFnBrand, OptionBrand, _, _>(Some(5))(Some("hello")), Some(5));