This API is similar to ndarray/base/for-each, except that a provided function is only invoked while a predicate function returns true. Once the predicate function returns false, the function should immediately return.

API signature:

whileEach( arrays, predicate, fcn[, thisArg ] )

where

• arrays: array-like object containing an input ndaray.
• predicate: predicate function.
• fcn: callback to apply.
• thisArg: callback function execution context.

Both the predicate and callback functions should be provided the following arguments:

• value: current array element.
• indices: current array element indices.
• arr: the input ndarray.

This package should be very similar to ndarray/base/for-each except that the inner loop logic becomes:

ind = take( [ i1, i0 ], idx );
if ( !predicate( xbuf[ ix ], ind, x.ref ) {
    return;
}
fcn.call( thisArg, xbuf[ ix ], ind, x.ref );
ix += dx0;