partial.lenses - npm Package Versions

3.4.1

Fixed bugs when removing a non-existing property from an object or a non-existent index from an array. Previously L.remove("x", {}) returned {}. Now it returns undefined as it was previously documented. Similarly L.remove(index, []) now returns undefined as was documented.

Tightened the semantics of combinators, including L.index, L.filter, L.prop and L.augment (and other combinators whose semantics are defined in terms of those), that specifically work on objects or arrays. Previously such combinators worked asymmetrically when operating on values not in their domain. Now they consistently treat values that are not in their domain as undefined. For example, L.get("x", null) now returns undefined (previously null) and, consistently, L.set("x", 1, null) now returns {x: 1} (previously error).

3.4.0

Added minimalistic experimental traversal support in the form of the sequence traversal.

13.1.0

Obsoleted L.iftes and added L.ifElse and L.cond as the replacements for it. The motivation for the change is that formatting tools such as Prettier cannot produce readable layouts for combinators that use such non-trivial argument patterns. In cases where there is just a single predicate, use L.ifElse:

-L.iftes(predicate, consequent, alternative)
+L.ifElse(predicate, consequent, alternative)

In cases where there are multiple predicates, use L.cond:

-L.iftes(predicate1, consequent1,
-        predicate2, consequent2,
-        alternative)
+L.cond([predicate1, consequent1],
+       [predicate2, consequent2],
+       [alternative])

3.0.0

Dropped implicit Ramda compatibility. To interop with Ramda, one must now explicitly convert lenses using L.toRamda and L.fromRamda. In particular, L.compose no longer necessarily returns a Ramda compatible lens and, in the future, the implementation may be changed more drastically. This change was made, because now a lens returned by L.compose can take less memory and it will also be possible to further optimize the implementation in the future.

Removed deprecated functions L.view, L.over and L.firstOf.

2.2.0

Renamed L.view and L.over:

-L.view
+L.get

-L.over
+L.modify

Calling deprecated functions now results in console.warn messages.

2.1.0

Deprecated L.firstOf and added L.choice, L.nothing and L.orElse that allows the same (and more) functionality to be expressed more compositionally.