fix: handle edge case when provided an empty ndarray

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---

Author: kgryte

lib/node_modules/@stdlib/ndarray/base/pop/lib/main.js

@@ -89,10 +89,10 @@ function pop( x, dim, writable ) {
 	s[ dim ] = sh[ dim ] - 1;
 
 	// Create a truncated view:
-	v0 = sliceTo( x, s, true, writable );
+	v0 = sliceTo( x, s, false, writable );
 
 	// Create a view of the last element(s):
-	v1 = sliceFrom( x, s, true, writable );
+	v1 = sliceFrom( x, s, false, writable );
 
 	return [ v0, v1 ];
 }

lib/node_modules/@stdlib/ndarray/base/pop/test/test.js

@@ -356,3 +356,70 @@ tape( 'the function returns an array containing ndarrays (ndims=3, writable)', f
 
 	t.end();
 });
+
+tape( 'the function returns empty views if provided an empty array (ndims=2)', function test( t ) {
+	var actual;
+	var buf;
+	var ord;
+	var sh;
+	var st;
+	var o;
+	var x;
+
+	buf = zeroTo( 8, 'float64' );
+	st = [ 4, 1 ];
+	o = 0;
+	ord = 'row-major';
+
+	sh = [ 2, 0 ];
+	x = new ndarray( 'float64', buf, sh, st, o, ord );
+
+	actual = pop( x, 0, false );
+
+	t.strictEqual( isndarrayLike( actual[0] ), true, 'returns expected value' );
+	t.strictEqual( isndarrayLike( actual[1] ), true, 'returns expected value' );
+	t.strictEqual( isReadOnly( actual[0] ), true, 'returns expected value' );
+	t.strictEqual( isReadOnly( actual[1] ), true, 'returns expected value' );
+	t.deepEqual( getShape( actual[0] ), [ 1, 0 ], 'returns expected value' );
+	t.deepEqual( getShape( actual[1] ), [ 1, 0 ], 'returns expected value' );
+	t.deepEqual( ndarray2array( actual[0] ), [], 'returns expected value' );
+	t.deepEqual( ndarray2array( actual[1] ), [], 'returns expected value' );
+
+	actual = pop( x, 1, false );
+
+	t.strictEqual( isndarrayLike( actual[0] ), true, 'returns expected value' );
+	t.strictEqual( isndarrayLike( actual[1] ), true, 'returns expected value' );
+	t.strictEqual( isReadOnly( actual[0] ), true, 'returns expected value' );
+	t.strictEqual( isReadOnly( actual[1] ), true, 'returns expected value' );
+	t.deepEqual( getShape( actual[0] ), [ 2, 0 ], 'returns expected value' );
+	t.deepEqual( getShape( actual[1] ), [ 2, 0 ], 'returns expected value' );
+	t.deepEqual( ndarray2array( actual[0] ), [], 'returns expected value' );
+	t.deepEqual( ndarray2array( actual[1] ), [], 'returns expected value' );
+
+	sh = [ 0, 4 ];
+	x = new ndarray( 'float64', buf, sh, st, o, ord );
+
+	actual = pop( x, 0, false );
+
+	t.strictEqual( isndarrayLike( actual[0] ), true, 'returns expected value' );
+	t.strictEqual( isndarrayLike( actual[1] ), true, 'returns expected value' );
+	t.strictEqual( isReadOnly( actual[0] ), true, 'returns expected value' );
+	t.strictEqual( isReadOnly( actual[1] ), true, 'returns expected value' );
+	t.deepEqual( getShape( actual[0] ), [ 0, 4 ], 'returns expected value' );
+	t.deepEqual( getShape( actual[1] ), [ 0, 4 ], 'returns expected value' );
+	t.deepEqual( ndarray2array( actual[0] ), [], 'returns expected value' );
+	t.deepEqual( ndarray2array( actual[1] ), [], 'returns expected value' );
+
+	actual = pop( x, 1, false );
+
+	t.strictEqual( isndarrayLike( actual[0] ), true, 'returns expected value' );
+	t.strictEqual( isndarrayLike( actual[1] ), true, 'returns expected value' );
+	t.strictEqual( isReadOnly( actual[0] ), true, 'returns expected value' );
+	t.strictEqual( isReadOnly( actual[1] ), true, 'returns expected value' );
+	t.deepEqual( getShape( actual[0] ), [ 0, 3 ], 'returns expected value' );
+	t.deepEqual( getShape( actual[1] ), [ 0, 1 ], 'returns expected value' );
+	t.deepEqual( ndarray2array( actual[0] ), [], 'returns expected value' );
+	t.deepEqual( ndarray2array( actual[1] ), [], 'returns expected value' );
+
+	t.end();
+});