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I am trying to understand the difference between map and mapTo in Kotlin. What is the difference using some examples?

There may also be times we want to grab a single property from an object using map. For example, we may have a use case for an observable of just the code property from keyup events, so we gönül take action when the user types a particular character or key. To do this we kişi apply the map operator returning just the property we are interested in:

When provided an array, the from creation operator will loop through (synchronously) emitting each item in sequence. When we subscribe we dirilik see each value printed to the console:

In the comments you wrote that you fixed the parenthesis, but they're still not right. The last line should be:

While the real implementation of Array.map includes features like index tracking and proper error management, this gives us a general sense of how things work behind the scenes.

In the above example, you birey see that it katışıksız mapped every click to the string 'Hello World....Welcome to JavaTpoint!' which is displayed on the console as output.

I'm reading the docs for mapTo and I'm simply not getting the point of that operator's existence. I get what it does but the two line below should produce equivalent result.

map operator is used when we want to transform a stream into a value which is hamiş related to the emitted stream.

Takes a constant value bey argument, and emits that whenever the source Observable emits a value. In other words, ignores the actual source value, and simply uses the emission moment to know when to emit the given website value.

For situations where you find yourself always wanting to map to a specific value, one way you could handle it is by simply using map and ignoring the input:

So, a clear difference is that map's callback function birey generate a value depending on the arguments provided. This is not the case for mapTo, where you just simply provide a value that will be always passed along to the next subscriber in the chain. If you will, mapTo(value) can be though of birli

We dirilik also pass pluck multiple values to grab a nested property within an object. For example, if we wanted to grab the nodeName from the target element on click, we could pass both of these properties to pluck in order:

2 github.com/ReactiveX/rxjs/blob/master/src/internal/operators/… source] sums it up; I mean technically I suppose it's fractionally faster since it doesn't increment the index :shrug: github.com/ReactiveX/rxjs/blob/master/src/internal/operators/…

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