Boolean filter improvement alternative: TS upgrade (#4840)

* upgrade typescript and use new feature

* fix: typing error

src/components/dialogs/ThreadgateEditor.tsx

@@ -74,7 +74,9 @@ function DialogContent({
 
   const onPressAudience = (setting: ThreadgateSetting) => {
     // remove nobody
-    let newSelected = draft.filter(v => v.type !== 'nobody')
+    let newSelected: ThreadgateSetting[] = draft.filter(
+      v => v.type !== 'nobody',
+    )
     // toggle
     const i = newSelected.findIndex(v => isEqual(v, setting))
     if (i === -1) {

src/state/queries/post-feed.ts

@@ -375,11 +375,11 @@ export function usePostFeedQuery(
                         }
                         return undefined
                       })
-                      .filter(<T>(n?: T): n is T => Boolean(n)),
+                      .filter(n => !!n),
                   }
                   return feedPostSlice
                 })
-                .filter(<T>(n?: T): n is T => Boolean(n)),
+                .filter(n => !!n),
             })),
           ],
         }

src/state/queries/threadgate.ts

@@ -33,6 +33,6 @@ export function threadgateViewToSettings(
       }
       return setting
     })
-    .filter(<T>(n?: T): n is T => Boolean(n))
+    .filter(n => !!n)
   return settings
 }

src/view/screens/Search/Explore.tsx

@@ -119,7 +119,7 @@ function LoadMore({
         }
         return loadMoreItem
       })
-      .filter(<T,>(n?: T): n is T => Boolean(n))
+      .filter(n => !!n)
   }, [item.items, moderationOpts])
 
   if (items.length === 0) return null