Comparator Funcs Guide

Comparator Funcs in R

ascend

Convert a function into an ascending comparator.

Func f = (Func)R.ascend.run(R.identity);
System.debug(f.run(1, 2));
// -1

cascade

Combine the comparator functions into one.

Func f = (Func)R.cascade.run(
    (Func)R.ascend.run(R.prop.apply('FirstName')),
    (Func)R.ascend.run(R.prop.apply('Description'))
);

clamp

Limit the value between the min and the max.

R.clamp.run(1, 3, 5)
// 3

comparator

Convert a Boolean-returning comparator to an Integer-returning comparator.

Func f = (Func)R.comparator.run(R.lt);
System.debug(f.run(1, 2));
// -1

compare

Compare two objects.

R.compare.run(1, 2)
// -1

descend

Convert a function into an descending comparator.

Func f = (Func)R.descend.run(R.identity);
System.debug(f.run(1, 2));
// 1

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