refactor: clean up of some todos

gohypergiant · Dec 3, 2024 · a2b915e · a2b915e
1 parent 6c23f31
commit a2b915e
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Showing 3 changed files with 10 additions and 14 deletions.
diff --git a/packages/predicates/src/is-latitude/index.ts b/packages/predicates/src/is-latitude/index.ts
@@ -12,8 +12,7 @@
 
 import { isFiniteNumber } from '../is-number';
 
-const MIN_LATITUDE = -90;
-const MAX_LATITUDE = 90;
+const MAX_ABSOLUTE_VALUE = 90;
 
 /**
  * Determines if given value is a valid latitude range.
@@ -32,8 +31,7 @@ export function isLatitude(val: unknown) {
     return false;
   }
 
-  // TODO: is there a better way to tell TS this is a number now based on isFiniteNumeber?
-  const ensuredValue = val as number;
+  const abs = Math.abs(val);
 
-  return ensuredValue >= MIN_LATITUDE && ensuredValue <= MAX_LATITUDE;
+  return abs >= 0 && abs <= MAX_ABSOLUTE_VALUE;
 }
diff --git a/packages/predicates/src/is-longitude/index.ts b/packages/predicates/src/is-longitude/index.ts
@@ -12,8 +12,7 @@
 
 import { isFiniteNumber } from '../is-number';
 
-const MIN_LONGITUDE = -180;
-const MAX_LONGITUDE = 180;
+const MAX_ABSOLUTE_VALUE = 180;
 
 /**
  * Determines if given value is a valid longitude range.
@@ -32,8 +31,7 @@ export function isLongitude(val: unknown) {
     return false;
   }
 
-  // TODO: is there a better way to tell TS this is a number now based on isFiniteNumeber?
-  const ensuredValue = val as number;
+  const abs = Math.abs(val);
 
-  return ensuredValue >= MIN_LONGITUDE && ensuredValue <= MAX_LONGITUDE;
+  return abs >= 0 && abs <= MAX_ABSOLUTE_VALUE;
 }
diff --git a/packages/predicates/src/is-number/index.ts b/packages/predicates/src/is-number/index.ts
@@ -23,7 +23,7 @@ import { isString } from '../is-string';
  * isNumber(NaN) // true
  * isNumber('1.23') // false
  */
-export function isNumber(val: unknown) {
+export function isNumber(val: unknown): val is number {
   return typeof val === 'number' || val instanceof Number;
 }
 
@@ -38,7 +38,7 @@ export function isNumber(val: unknown) {
  * isFiniteNumber(NaN) // false
  * isFiniteNumber('1.23') // false
  */
-export function isFiniteNumber(val: unknown) {
+export function isFiniteNumber(val: unknown): val is number {
   return Number.isFinite(val);
 }
 
@@ -54,7 +54,7 @@ export function isFiniteNumber(val: unknown) {
  * isFiniteNumeric('1.23') // true
  * isFiniteNumeric('hi') // false
  */
-export function isFiniteNumeric(val: unknown) {
+export function isFiniteNumeric(val: unknown): val is number {
   const parsed = isString(val) ? Number.parseFloat(val as string) : val;
 
   return !Number.isNaN(parsed) && isFiniteNumber(parsed);
@@ -72,7 +72,7 @@ export function isFiniteNumeric(val: unknown) {
  * isNumeric('1.23') // true
  * isNumeric('hi') // false
  */
-export function isNumeric(val: unknown) {
+export function isNumeric(val: unknown): val is number {
   if (isString(val)) {
     return (
       val === 'Infinity' ||