📝 delete std/sort.nas & update test file

test/quick_sort.nas

@@ -1,10 +1,32 @@
-import.std.sort;
 
-var var_sort = sort.var_sort;
-var sort = sort.sort;
+var var_sort=func(){
+    srand(); # be aware! this causes global changes
+    var quick_sort_core=func(vec,left,right){
+        if(left>=right) return nil;
+        var base=left+int(rand()*(right-left));
+        (vec[left],vec[base])=(vec[base],vec[left]);
+        var (i,j,tmp)=(left,right,vec[left]);
+        while(i<j){
+            while(i<j and tmp<vec[j])
+                j-=1;
+            vec[i]=vec[j];
+            while(i<j and vec[i]<tmp)
+                i+=1;
+            vec[j]=vec[i];
+            j-=1;
+        }
+        vec[i]=tmp;
+        quick_sort_core(vec,left,i-1);
+        quick_sort_core(vec,i+1,right);
+        return nil;
+    }
+    return func(vec){
+        quick_sort_core(vec,0,size(vec)-1);
+        return nil;
+    }
+}();
 
-
-var vec=[];
+var vec = [];
 setsize(vec, 1e4);
 rand(time(0));
 for(var i=0;i<1e4;i+=1)