chore: apply suggestions from review

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Author: anandkaranubc

lib/node_modules/@stdlib/stats/base/dists/hypergeometric/pmf/manifest.json

@@ -43,7 +43,8 @@
         "@stdlib/math/base/special/factorialln",
         "@stdlib/math/base/special/max",
         "@stdlib/math/base/special/min",
-        "@stdlib/math/base/assert/is-nonnegative-integer"
+        "@stdlib/math/base/assert/is-nonnegative-integer",
+        "@stdlib/math/base/assert/is-nan"
       ]
     },
     {
@@ -63,7 +64,8 @@
         "@stdlib/math/base/special/max",
         "@stdlib/math/base/special/min",
         "@stdlib/math/base/special/round",
-        "@stdlib/math/base/assert/is-nonnegative-integer"
+        "@stdlib/math/base/assert/is-nonnegative-integer",
+        "@stdlib/math/base/assert/is-nan"
       ]
     },
     {
@@ -83,7 +85,8 @@
         "@stdlib/math/base/special/max",
         "@stdlib/math/base/special/min",
         "@stdlib/math/base/special/round",
-        "@stdlib/math/base/assert/is-nonnegative-integer"
+        "@stdlib/math/base/assert/is-nonnegative-integer",
+        "@stdlib/math/base/assert/is-nan"
       ]
     }
   ]

lib/node_modules/@stdlib/stats/base/dists/hypergeometric/pmf/src/main.c

@@ -18,6 +18,7 @@
 
 #include "stdlib/stats/base/dists/hypergeometric/pmf.h"
 #include "stdlib/math/base/assert/is_nonnegative_integer.h"
+#include "stdlib/math/base/assert/is_nan.h"
 #include "stdlib/math/base/special/factorialln.h"
 #include "stdlib/math/base/special/exp.h"
 #include "stdlib/math/base/special/max.h"
@@ -44,7 +45,7 @@ double stdlib_base_dists_hypergeometric_pmf( const double x, const int32_t N, co
 	double maxs;
 	double mins;
 
-	if (  N < 0 || K < 0 || n < 0 || K > N || n > N ) {
+	if ( stdlib_base_is_nan( x ) || N < 0 || K < 0 || n < 0 || K > N || n > N ) {
 		return 0.0/0.0; // NaN
 	}
 

lib/node_modules/@stdlib/stats/base/dists/hypergeometric/pmf/test/test.native.js

@@ -49,6 +49,12 @@ tape( 'main export is a function', opts, function test( t ) {
 	t.end();
 });
 
+tape( 'if provided `NaN` for input value `x`, the function returns `NaN`', function test( t ) {
+	var y = pmf( NaN, 10, 10, 5 );
+	t.equal( isnan( y ), true, 'returns expected value' );
+	t.end();
+});
+
 tape( 'if provided an integer `x` greater than `min( n, K )`, the function returns `0` (provided all parameters are valid)', opts, function test( t ) {
 	var y = pmf( 11.0, 20, 20, 10 );
 	t.equal( y, 0.0, 'returns expected value' );