From 19cd94cab03604e2528cb444fe3e72003c6bbbeb Mon Sep 17 00:00:00 2001
From: ralphwetzel <ralphwetzel@users.noreply.github.com>
Date: Sat, 23 Jan 2021 19:53:45 +0100
Subject: [PATCH] Add 'subarray' and 'set' to TypedArray prototype

---
 js2py/prototypes/jstypedarray.py | 19 +++++++++++++++++++
 1 file changed, 19 insertions(+)

diff --git a/js2py/prototypes/jstypedarray.py b/js2py/prototypes/jstypedarray.py
index 43285aae..489de154 100644
--- a/js2py/prototypes/jstypedarray.py
+++ b/js2py/prototypes/jstypedarray.py
@@ -315,6 +315,25 @@ def reduceRight(callbackfn):
             k -= 1
         return accumulator
 
+    def subarray(begin, end):
+        return slice(begin, end)
+    
+    def set(array, offset = 0):
+        offset = 0 if (offset.is_undefined() or offset.is_null()) else offset.to_int()
+        target = this.to_object()
+        target_len = target.get("length").to_uint32()
+        vals = to_arr(array)
+        vals_len = len(vals)
+        
+        if offset + vals_len > target_len:
+            raise this.MakeError(
+                'RangeError', 'Trying to store values beyond target array length.')
+
+        n = 0
+        while n < vals_len:
+            this.put(str(n + offset), vals[n])
+            n += 1
+
 
 def sort_compare(a, b, comp):
     if a is None: