Updates changelog and readme

hasura · Feb 7, 2022 · 2ed8228 · 2ed8228
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diff --git a/CHANGELOG.md b/CHANGELOG.md
@@ -1,7 +1,8 @@
 # Revision history for Kriti-Lang
 
 ## Upcoming
-  - Adds optional lookup operator.
+  - adds defaulting operator `??`
+  - Adds optional path lookup operator.
   - Fixes unicode support.
   - Adds a Pretty Printer.
   - Adds `!=`, `>=`, `<=`, `in` operators and `not` function.

diff --git a/README.md b/README.md
@@ -35,6 +35,14 @@ This example will return a `null` if `foo` is not bound in `$body`. Optional loo
 * `?[x]` is used to optionally lookup array indices
 * `?['a b c']` is used to optionally lookup string literal object fields
 
+#### Defaulting Operator
+
+The defaulting operator `??` can be used to replace a `null` value with any other value. The expression `null ?? true` will evaluate to `true`. This is especially useful when used with path lookups:
+
+```
+$foo?.bar ?? true
+```
+
 #### Loops
 
 The `range` identifier is used to declare for loops: