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stdlib-js · Feb 15, 2024 · aa0a057 · aa0a057
1 parent 9aad113
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Showing 3 changed files with 1,250 additions and 9 deletions.
diff --git a/index/lib/main.js b/index/lib/main.js
@@ -83,16 +83,20 @@ function ArrayIndex( x ) {
 
 	// When provided a "generic" array or an array of an unknown data type, attempt to infer the type of index array...
 	if ( dt === 'generic' || dt === null ) {
-		get = resolveGetter( x );
-		v = get( x, 0 );
-
-		// Infer the "type" of index array from the first element...
-		if ( isBoolean( v ) ) {
-			t = 'bool';
-		} else if ( isInteger( v ) ) {
-			t = 'int';
+		if ( x.length > 0 ) {
+			get = resolveGetter( x );
+			v = get( x, 0 );
+
+			// Infer the "type" of index array from the first element...
+			if ( isBoolean( v ) ) {
+				t = 'bool';
+			} else if ( isInteger( v ) ) {
+				t = 'int';
+			} else {
+				throw new TypeError( 'invalid argument. First argument must be a valid index array.' );
+			}
 		} else {
-			throw new TypeError( 'invalid argument. First argument must be a valid index array.' );
+			t = 'int';
 		}
 	} else if ( dt === 'int32' ) {
 		t = 'int';