function absBy( N, x, strideX, y, strideY, clbk, thisArg ) {
	return mapBy( N, x, strideX, y, strideY, abs, clbk, thisArg );
}
Computes the absolute value of each element retrieved from a strided input array `x` via a callback function and assigns each result to an element in a strided output array `y`.

@param {NonNegativeInteger} N - number of indexed elements
@param {Collection} x - input array/collection
@param {integer} strideX - `x` stride length
@param {Collection} y - destination array/collection
@param {integer} strideY - `y` stride length
@param {Callback} clbk - callback
@param {*} [thisArg] - callback execution context
@returns {Collection} `y`

@example
function accessor( v ) {
    return v * 2.0;
}

var x = [ 1.0, -2.0, 3.0, -4.0, 5.0 ];
var y = [ 0.0, 0.0, 0.0, 0.0, 0.0 ];

absBy( x.length, x, 1, y, 1, accessor );

console.log( y );
// => [ 2.0, 4.0, 6.0, 8.0, 10.0 ]