refactor: reduce code duplication

lib/node_modules/@stdlib/strided/base/dmap/lib/main.js

@@ -18,6 +18,12 @@
 
 'use strict';
 
+// MODULES //
+
+var stride2offset = require( '@stdlib/strided/base/stride2offset' );
+var ndarray = require( './ndarray.js' );
+
+
 // MAIN //
 
 /**
@@ -47,28 +53,7 @@
 * // => <Float64Array>[ 10.0, 20.0, 30.0, 40.0, 50.0 ]
 */
 function dmap( N, x, strideX, y, strideY, fcn ) {
-	var ix;
-	var iy;
-	var i;
-	if ( N <= 0 ) {
-		return y;
-	}
-	if ( strideX < 0 ) {
-		ix = (1-N) * strideX;
-	} else {
-		ix = 0;
-	}
-	if ( strideY < 0 ) {
-		iy = (1-N) * strideY;
-	} else {
-		iy = 0;
-	}
-	for ( i = 0; i < N; i++ ) {
-		y[ iy ] = fcn( x[ ix ] );
-		ix += strideX;
-		iy += strideY;
-	}
-	return y;
+	return ndarray( N, x, strideX, stride2offset( N, strideX ), y, strideY, stride2offset( N, strideY ), fcn ); // eslint-disable-line max-len
 }