แมปและรวม Flow

Raw data rarely matches what the screen needs. You use flow operators to transform a stream into ready-to-render UI state.

The map operator runs a function on each emission and passes the result downstream, leaving the original stream untouched.

Use filter to drop emissions you do not care about, so only the items that pass your condition reach the UI.

The combine operator merges multiple flows and re-runs whenever any of them emits, giving you the latest value from each.

A common pattern is to combine several source flows into one immutable UiState object that fully describes the screen.

While combine fires on any change, zip pairs emissions one-to-one and waits until both flows have produced a new value.

With flatMapLatest a new value cancels the previous inner flow and switches to a fresh one, perfect for live search.

Transformations like map and filter are cold: they describe work but do nothing until something downstream collects.

You can chain operators into a pipeline. Each one reads the stream above it and feeds the one below, top to bottom.

The catch operator intercepts exceptions upstream so you can emit a fallback instead of crashing the whole stream.

Do your combine and map work in the ViewModel, then expose one clean state flow. The Composable stays simple and dumb.

Pick the operator for the job.

Great work! Operators like map, filter, and combine reshape and merge streams in the ViewModel so the UI gets exactly the state it needs. 🎯