Fix example and add example

Author: kgryte

lib/node_modules/@stdlib/array/complex64/lib/main.js

@@ -280,11 +280,20 @@ Object.defineProperty( Complex64Array, 'BYTES_PER_ELEMENT', {
 *
 * @example
 * var Complex64 = require( '@stdlib/complex/float32' );
+*
+* var arr = Complex64Array.from( [ new Complex64( 1.0, 1.0 ) ] );
+* // returns <Complex64Array>
+*
+* var len = arr.length;
+* // returns 1
+*
+* @example
+* var Complex64 = require( '@stdlib/complex/float32' );
 * var real = require( '@stdlib/complex/real' );
 * var imag = require( '@stdlib/complex/imag' );
 *
 * function clbk( v ) {
-*     return new Complex( real(v)*2.0, imag(v)*2.0 );
+*     return new Complex64( real(v)*2.0, imag(v)*2.0 );
 * }
 *
 * var arr = Complex64Array.from( [ new Complex64( 1.0, 1.0 ) ], clbk );