Function ifNotUndefined

Calls a function if the input value is not undefined. Return value from function is passed to next function in flow.

const flow = Process.flow(
 Process.max(),
 Process.seenLastToUndefined(),
 Process.ifNotUndefined(v => {
   console.log(`v:`, v);
 })
);
flow(100); // Prints 'v:100'
flow(90);  // Nothing happens max value has not changed
flow(110); // Prints 'v:110'
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