refactor: reduce code duplication

Author: kgryte

lib/node_modules/@stdlib/strided/base/map-by/lib/accessors.js

@@ -18,6 +18,12 @@
 
 'use strict';
 
+// MODULES //
+
+var stride2offset = require( '@stdlib/strided/base/stride2offset' );
+var ndarray = require( './accessors.ndarray.js' );
+
+
 // MAIN //
 
 /**
@@ -60,32 +66,7 @@
 * // => [ 2.0, 4.0, 6.0, 8.0, 10.0 ]
 */
 function mapBy( N, x, strideX, xget, y, strideY, yset, fcn, clbk, thisArg ) {
-	var ix;
-	var iy;
-	var v;
-	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++ ) {
-		v = clbk.call( thisArg, xget( x, ix ), i, [ ix, iy ], [ x, y ] );
-		if ( v !== void 0 ) {
-			yset( y, iy, fcn( v ) );
-		}
-		ix += strideX;
-		iy += strideY;
-	}
-	return y;
+	return ndarray( N, x, strideX, stride2offset( N, strideX ), xget, y, strideY, stride2offset( N, strideY ), yset, fcn, clbk, thisArg ); // eslint-disable-line max-len
 }
 
 

lib/node_modules/@stdlib/strided/base/map-by/lib/map.js

@@ -18,6 +18,12 @@
 
 'use strict';
 
+// MODULES //
+
+var stride2offset = require( '@stdlib/strided/base/stride2offset' );
+var ndarray = require( './map.ndarray.js' );
+
+
 // MAIN //
 
 /**
@@ -50,32 +56,7 @@
 * // => [ 2.0, 4.0, 6.0, 8.0, 10.0 ]
 */
 function mapBy( N, x, strideX, y, strideY, fcn, clbk, thisArg ) {
-	var ix;
-	var iy;
-	var v;
-	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++ ) {
-		v = clbk.call( thisArg, x[ ix ], i, [ ix, iy ], [ x, y ] );
-		if ( v !== void 0 ) {
-			y[ iy ] = fcn( v );
-		}
-		ix += strideX;
-		iy += strideY;
-	}
-	return y;
+	return ndarray( N, x, strideX, stride2offset( N, strideX ), y, strideY, stride2offset( N, strideY ), fcn, clbk, thisArg ); // eslint-disable-line max-len
 }