function unary( arrays, shape, strides, accessors, fcn ) {
	var offsets;
	var N;

	N = shape[ 0 ];
	offsets = [
		stride2offset( N, strides[ 0 ] ),
		stride2offset( N, strides[ 1 ] )
	];
	return ndarray( arrays, shape, strides, offsets, accessors, fcn );
}
Applies a unary callback to elements in a strided input array and assigns results to elements in a strided output array.

@private
@param {ArrayLikeObject<Collection>} arrays - array-like object containing one input array and one output array
@param {NonNegativeIntegerArray} shape - array-like object containing a single element, the number of indexed elements
@param {IntegerArray} strides - array-like object containing the stride lengths for the input and output arrays
@param {Array<Function>} accessors - array-like object containing accessors for the input and output arrays
@param {Callback} fcn - unary callback
@returns {void}

@example
var Float64Array = require( '@stdlib/array/float64' );

function scale( x ) {
    return x * 10.0;
}

function get( buf, idx ) {
    return buf[ idx ] * 2.0;
}

function set( buf, idx, value ) {
    buf[ idx ] = value;
}

var x = new Float64Array( [ 1.0, 2.0, 3.0, 4.0, 5.0 ] );
var y = new Float64Array( x.length );

var shape = [ x.length ];
var strides = [ 1, 1 ];

unary( [ x, y ], shape, strides, [ get, set ], scale );

console.log( y );
// => <Float64Array>[ 20.0, 40.0, 60.0, 80.0, 100.0 ]