TEEING.md

Teeing:

An small variation for the chaining pattern, that uses functions, but ignores its result (if any):

    value val1 = method1(initialValue);
    method2(val1);
    value val3 = method3(val1);

Chain steps

Using the tee method will allow to insert the method into the chain:

    chain(initialValue).tee(method2).to(method3);

This is pretty useful for side-effects only functions, like logging or void operations:

    chain(...).to(generateData).tee(logData).to(methodOnData)...

Chain start

Like for chaining, teeing offer two top-level methods for starting a chain: tee and tees

    value ch = tee(initialValue, logMethod).to(method1);

Note there is no tee variant accepting only the initial value.

END

If you understood chaining, teeing is just a piece of cake. Next chapter will introduce advanced spreading concepts.